<documentid="4EDD8ED901F55E4657FD885873DD9727"ID-DOI="10.11646/zootaxa.5496.1.7"ID-ISSN="1175-5326"ID-Zenodo-Dep="13331098"ID-ZooBank="A5069C57-6179-41EE-9134-B3D4F8C7A222"IM.bibliography_approvedBy="carolina"IM.illustrations_approvedBy="felipe"IM.materialsCitations_approvedBy="carolina"IM.metadata_approvedBy="felipe"IM.taxonomicNames_approvedBy="felipe"IM.treatmentCitations_approvedBy="felipe"IM.treatments_approvedBy="felipe"checkinTime="1723805874868"checkinUser="plazi"docAuthor="Ng, Peter K. L. & Anker, Arthur"docDate="2024"docId="8509878D9B0CFF87C8A9FDF71286FD56"docLanguage="en"docName="zootaxa.5496.1.7.pdf"docOrigin="Zootaxa 5496 (1)"docSource="http://dx.doi.org/10.11646/zootaxa.5496.1.7"docStyle="DocumentStyle:647186512141C8FC8976D5BCC54AEB7D.9:Zootaxa.2013-.journal_article"docStyleId="647186512141C8FC8976D5BCC54AEB7D"docStyleName="Zootaxa.2013-.journal_article"docStyleVersion="9"docTitle="Camptoplax ahmar Ng & Anker, 2024, sp. nov."docType="treatment"docVersion="3"lastPageNumber="126"masterDocId="7930FFF59B0DFF80C83EFFD51605FF9B"masterDocTitle="Camptoplax ahmar sp. nov., a new pilumnid crab (Crustacea: Brachyura) from the Red Sea"masterLastPageNumber="126"masterPageNumber="119"pageNumber="120"updateTime="1725046574487"updateUser="carolina"zenodo-license-document="CLOSED">
<mods:namePartid="2C30E1253150CE81465D5E6D950E3FFC">Ng, Peter K. L.</mods:namePart>
<mods:affiliationid="964DCD2D322B980BFB7FB40593B33E79">Lee Kong Chian Natural History Museum, Faculty of Science, National University of Singapore, 2 Conservatory Drive, Singapore 117377, Singapore</mods:affiliation>
<mods:affiliationid="643ECAE4405D16A176FA1712ADA38715">Universidade Federal de Pelotas (UFPEL), Departamento de Ecologia, Zoologia e Genética, Instituto de Biologia, Campus Universitário Capão do Leão, RS, 96010 - 610, Brazil & Biological and Environmental Science & Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia</mods:affiliation>
<taxonomicNameid="CAA04D189B0CFF81C8A9FDF71784FDA6"authorityName="Ng & Anker"authorityYear="2024"box="[151,385,546,573]"class="Malacostraca"family="Pilumnidae"genus="Camptoplax"kingdom="Animalia"order="Decapoda"pageId="1"pageNumber="120"phylum="Arthropoda"rank="species"species="ahmar"status="sp. nov.">
<figureCitationid="959B2A1E9B0CFF81C8A1FD92170CFDFA"box="[159,265,582,609]"captionStart-0="FIGURE 1"captionStart-1="FIGURE 2"captionStart-2="FIGURE 3"captionStart-3="FIGURE 4"captionStart-4="FIGURE 5"captionStartId-0="2.[151,250,1912,1936]"captionStartId-1="3.[151,250,1772,1796]"captionStartId-2="4.[151,250,1856,1880]"captionStartId-3="5.[151,250,1097,1121]"captionStartId-4="6.[151,250,1328,1352]"captionTargetBox-0="[151,1436,179,1886]"captionTargetBox-1="[151,1435,181,1748]"captionTargetBox-2="[151,1435,181,1832]"captionTargetBox-3="[151,1435,181,1073]"captionTargetBox-4="[158,1428,496,1298]"captionTargetId-0="figure-20@2.[151,1436,179,1886]"captionTargetId-1="figure-17@3.[151,1435,181,1748]"captionTargetId-2="figure-20@4.[151,1435,181,1832]"captionTargetId-3="figure-17@5.[151,1435,181,1073]"captionTargetId-4="figure-148@6.[151,1435,489,1305]"captionTargetPageId-0="2"captionTargetPageId-1="3"captionTargetPageId-2="4"captionTargetPageId-3="5"captionTargetPageId-4="6"captionText-0="FIGURE 1. Camptoplax ahmar sp. nov., holotype, male (9.7 × 8.0 mm) from Thuwal, Saudi Arabia, FLMNH UF 72875, crab alive in dorsal (A), ventral (B) and frontal (C) views (right P2 missing). Photographs by AA."captionText-1="FIGURE 2. Camptoplax ahmar sp. nov., holotype, male (9.7 × 8.0 mm) from Thuwal, Saudi Arabia, FLMNH UF 72875; A, habitus, dorsal view (right P2 missing); B, carapace, dorsal view; C, right side of carapace, showing orbits and front, dorsal view; D, cephalothorax, frontal view; E, antennules, antenna, orbit, suborbital region and epistome, frontal view."captionText-2="FIGURE 3. Camptoplax ahmar sp. nov., holotype, male (9.7 × 8.0 mm) from Thuwal, Saudi Arabia, FLMNH UF 72875; A, antennules, antenna, orbit, suborbital region and epistome (denuded), frontal view; B, right third maxilliped (denuded), outer view; C, cephalothorax, anteroventral view; D, posterior thoracic sternum and pleonal somites 1–5, showing exposed sternite 8 (denuded), ventral view; E, anterior thoracic sternum and sternopleonal cavity, showing right G1 (denuded) in situ, ventral view."captionText-3="FIGURE 4. Camptoplax ahmar sp. nov., holotype, male (9.7 × 8.0 mm) from Thuwal, Saudi Arabia, FLMNH UF 72875; A, right and left chelae, outer view; B, right cheliped (partially denuded), dorsal view; C, right P4 (partially denuded), dorsal view; D, right P5 (partially denuded), dorsal view."captionText-4="FIGURE 5. Camptoplax ahmar sp. nov., holotype, male (9.7 × 8.0 mm) from Thuwal, Saudi Arabia, FLMNH UF 72875; A, pleon; B, left G1, ventral view; C, distal part of left G1, ventral view; D, distal part of left G1, dorsal view; E, left G2, ventral view. Scales: A = 1.0 mm; B, E = 0.5 mm; C, D = 0.2 mm."figureDoi-0="http://doi.org/10.5281/zenodo.13331100"figureDoi-1="http://doi.org/10.5281/zenodo.13331102"figureDoi-2="http://doi.org/10.5281/zenodo.13331104"figureDoi-3="http://doi.org/10.5281/zenodo.13331106"figureDoi-4="http://doi.org/10.5281/zenodo.13331109"httpUri-0="https://zenodo.org/record/13331100/files/figure.png"httpUri-1="https://zenodo.org/record/13331102/files/figure.png"httpUri-2="https://zenodo.org/record/13331104/files/figure.png"httpUri-3="https://zenodo.org/record/13331106/files/figure.png"httpUri-4="https://zenodo.org/record/13331109/files/figure.png"pageId="1"pageNumber="120">Figs. 1–5</figureCitation>
<materialsCitationid="BDC83CC69B0CFF81C9B7FD5A12BAFC8E"collectingDate="2022-12-29"collectionCode="FLMNH, KAUST"collectorName=" A. Anker & A. Assayie"country="Saudi Arabia"county="King Abdullah Monument"elevation="1"latitude="22.340612"location="Red Sea"longLatPrecision="1"longitude="39.08753"municipality="King Abdullah University of Science"pageId="1"pageNumber="120"specimenCode="UF 72875"specimenCount="1"typeStatus="holotype">
<collectionCodeid="6BB1AE5E9B0CFF81CAC5FD5A155AFD32"box="[763,863,655,681]"country="USA"httpUri="http://grbio.org/cool/24h4-51mc"name="Florida Museum of Natural History"pageId="1"pageNumber="120"type="Museum">FLMNH</collectionCode>
<specimenCodeid="5D069EE09B0CFF81CB59FD5A15D8FD32"box="[871,989,654,681]"collectionCode="UF"country="USA"lsid="urn:lsid:biocol.org:col:34858"name="Florida Museum of Natural History- Zoology, Paleontology and Paleobotany"pageId="1"pageNumber="120"type="Museum">UF 72875</specimenCode>
<locationid="087F60409B0CFF81CCACFD5A12EAFD32"LSID="urn:lsid:plazi:treatment:8509878D9B0CFF87C8A9FDF71286FD56:087F60409B0CFF81CCACFD5A12EAFD32"box="[1170,1263,655,681]"country="Saudi Arabia"county="King Abdullah Monument"latitude="22.340612"longLatPrecision="1"longitude="39.08753"municipality="King Abdullah University of Science"name="Red Sea"pageId="1"pageNumber="120">Red Sea</location>
coast,
<locationid="087F60409B0CFF81CD7EFD5A139DFD32"LSID="urn:lsid:plazi:treatment:8509878D9B0CFF87C8A9FDF71286FD56:087F60409B0CFF81CD7EFD5A139DFD32"box="[1344,1432,655,681]"country="Saudi Arabia"county="King Abdullah Monument"latitude="22.340612"longLatPrecision="1"longitude="39.08753"municipality="King Abdullah University of Science"name="Thuwal"pageId="1"pageNumber="120">Thuwal</location>
,
<collectingMunicipalityid="ED7BACE19B0CFF81C8A9FD661443FD56"box="[151,582,691,717]"pageId="1"pageNumber="120">King Abdullah University of Science</collectingMunicipality>
<collectingDateid="695AE9B39B0CFF81CB20FD2E15F6FC8E"box="[798,1011,763,789]"pageId="1"pageNumber="120"value="2022-12-29">29 December 2022</collectingDate>
. Frontal margin prominently projecting anteriorly, margin clearly beyond base of orbit (
<figureCitationid="959B2A1E9B0CFF81CD0FFCCA1392FCA2"box="[1329,1431,799,825]"captionStart="FIGURE 1"captionStartId="2.[151,250,1912,1936]"captionTargetBox="[151,1436,179,1886]"captionTargetId="figure-20@2.[151,1436,179,1886]"captionTargetPageId="2"captionText="FIGURE 1. Camptoplax ahmar sp. nov., holotype, male (9.7 × 8.0 mm) from Thuwal, Saudi Arabia, FLMNH UF 72875, crab alive in dorsal (A), ventral (B) and frontal (C) views (right P2 missing). Photographs by AA."figureDoi="http://doi.org/10.5281/zenodo.13331100"httpUri="https://zenodo.org/record/13331100/files/figure.png"pageId="1"pageNumber="120">Figs. 1A</figureCitation>
,
<figureCitationid="959B2A1E9B0CFF81C8A9FC9616E5FCC6"box="[151,224,835,861]"captionStart="FIGURE 2"captionStartId="3.[151,250,1772,1796]"captionTargetBox="[151,1435,181,1748]"captionTargetId="figure-17@3.[151,1435,181,1748]"captionTargetPageId="3"captionText="FIGURE 2. Camptoplax ahmar sp. nov., holotype, male (9.7 × 8.0 mm) from Thuwal, Saudi Arabia, FLMNH UF 72875; A, habitus, dorsal view (right P2 missing); B, carapace, dorsal view; C, right side of carapace, showing orbits and front, dorsal view; D, cephalothorax, frontal view; E, antennules, antenna, orbit, suborbital region and epistome, frontal view."figureDoi="http://doi.org/10.5281/zenodo.13331102"httpUri="https://zenodo.org/record/13331102/files/figure.png"pageId="1"pageNumber="120">2A–D</figureCitation>
); male chela relatively elongate, fingers shorter than palm (
<figureCitationid="959B2A1E9B0CFF81CB50FC9615F7FCC6"box="[878,1010,835,861]"captionStart="FIGURE 1"captionStartId="2.[151,250,1912,1936]"captionTargetBox="[151,1436,179,1886]"captionTargetId="figure-20@2.[151,1436,179,1886]"captionTargetPageId="2"captionText="FIGURE 1. Camptoplax ahmar sp. nov., holotype, male (9.7 × 8.0 mm) from Thuwal, Saudi Arabia, FLMNH UF 72875, crab alive in dorsal (A), ventral (B) and frontal (C) views (right P2 missing). Photographs by AA."figureDoi="http://doi.org/10.5281/zenodo.13331100"httpUri="https://zenodo.org/record/13331100/files/figure.png"pageId="1"pageNumber="120">Figs. 1A–C</figureCitation>
,
<figureCitationid="959B2A1E9B0CFF81CBC2FC961224FCC6"box="[1020,1057,835,861]"captionStart="FIGURE 2"captionStartId="3.[151,250,1772,1796]"captionTargetBox="[151,1435,181,1748]"captionTargetId="figure-17@3.[151,1435,181,1748]"captionTargetPageId="3"captionText="FIGURE 2. Camptoplax ahmar sp. nov., holotype, male (9.7 × 8.0 mm) from Thuwal, Saudi Arabia, FLMNH UF 72875; A, habitus, dorsal view (right P2 missing); B, carapace, dorsal view; C, right side of carapace, showing orbits and front, dorsal view; D, cephalothorax, frontal view; E, antennules, antenna, orbit, suborbital region and epistome, frontal view."figureDoi="http://doi.org/10.5281/zenodo.13331102"httpUri="https://zenodo.org/record/13331102/files/figure.png"pageId="1"pageNumber="120">2A</figureCitation>
,
<figureCitationid="959B2A1E9B0CFF81CC15FC96124BFCC6"box="[1067,1102,835,861]"captionStart="FIGURE 3"captionStartId="4.[151,250,1856,1880]"captionTargetBox="[151,1435,181,1832]"captionTargetId="figure-20@4.[151,1435,181,1832]"captionTargetPageId="4"captionText="FIGURE 3. Camptoplax ahmar sp. nov., holotype, male (9.7 × 8.0 mm) from Thuwal, Saudi Arabia, FLMNH UF 72875; A, antennules, antenna, orbit, suborbital region and epistome (denuded), frontal view; B, right third maxilliped (denuded), outer view; C, cephalothorax, anteroventral view; D, posterior thoracic sternum and pleonal somites 1–5, showing exposed sternite 8 (denuded), ventral view; E, anterior thoracic sternum and sternopleonal cavity, showing right G1 (denuded) in situ, ventral view."figureDoi="http://doi.org/10.5281/zenodo.13331104"httpUri="https://zenodo.org/record/13331104/files/figure.png"pageId="1"pageNumber="120">3C</figureCitation>
,
<figureCitationid="959B2A1E9B0CFF81CC67FC961298FCC6"box="[1113,1181,835,861]"captionStart="FIGURE 4"captionStartId="5.[151,250,1097,1121]"captionTargetBox="[151,1435,181,1073]"captionTargetId="figure-17@5.[151,1435,181,1073]"captionTargetPageId="5"captionText="FIGURE 4. Camptoplax ahmar sp. nov., holotype, male (9.7 × 8.0 mm) from Thuwal, Saudi Arabia, FLMNH UF 72875; A, right and left chelae, outer view; B, right cheliped (partially denuded), dorsal view; C, right P4 (partially denuded), dorsal view; D, right P5 (partially denuded), dorsal view."figureDoi="http://doi.org/10.5281/zenodo.13331106"httpUri="https://zenodo.org/record/13331106/files/figure.png"pageId="1"pageNumber="120">4A, B</figureCitation>
); P4 merus length 2.98 times width; P5 merus length 2.94 times width; P2–P4 propodus elongate, P4 propodus length 2.63 times width; P5 propodus short, length 1.80 times width; P4 dactylus long, falciform, length 1.07 times width; P5 dactylus short, length 0.94 times width (
<figureCitationid="959B2A1E9B0CFF81C98DFC7A141DFC52"box="[435,536,943,969]"captionStart="FIGURE 1"captionStartId="2.[151,250,1912,1936]"captionTargetBox="[151,1436,179,1886]"captionTargetId="figure-20@2.[151,1436,179,1886]"captionTargetPageId="2"captionText="FIGURE 1. Camptoplax ahmar sp. nov., holotype, male (9.7 × 8.0 mm) from Thuwal, Saudi Arabia, FLMNH UF 72875, crab alive in dorsal (A), ventral (B) and frontal (C) views (right P2 missing). Photographs by AA."figureDoi="http://doi.org/10.5281/zenodo.13331100"httpUri="https://zenodo.org/record/13331100/files/figure.png"pageId="1"pageNumber="120">Figs. 1A</figureCitation>
,
<figureCitationid="959B2A1E9B0CFF81CA1BFC7A144CFC52"box="[549,585,943,969]"captionStart="FIGURE 2"captionStartId="3.[151,250,1772,1796]"captionTargetBox="[151,1435,181,1748]"captionTargetId="figure-17@3.[151,1435,181,1748]"captionTargetPageId="3"captionText="FIGURE 2. Camptoplax ahmar sp. nov., holotype, male (9.7 × 8.0 mm) from Thuwal, Saudi Arabia, FLMNH UF 72875; A, habitus, dorsal view (right P2 missing); B, carapace, dorsal view; C, right side of carapace, showing orbits and front, dorsal view; D, cephalothorax, frontal view; E, antennules, antenna, orbit, suborbital region and epistome, frontal view."figureDoi="http://doi.org/10.5281/zenodo.13331102"httpUri="https://zenodo.org/record/13331102/files/figure.png"pageId="1"pageNumber="120">2A</figureCitation>
,
<figureCitationid="959B2A1E9B0CFF81CA68FC7A1498FC52"box="[598,669,943,969]"captionStart="FIGURE 4"captionStartId="5.[151,250,1097,1121]"captionTargetBox="[151,1435,181,1073]"captionTargetId="figure-17@5.[151,1435,181,1073]"captionTargetPageId="5"captionText="FIGURE 4. Camptoplax ahmar sp. nov., holotype, male (9.7 × 8.0 mm) from Thuwal, Saudi Arabia, FLMNH UF 72875; A, right and left chelae, outer view; B, right cheliped (partially denuded), dorsal view; C, right P4 (partially denuded), dorsal view; D, right P5 (partially denuded), dorsal view."figureDoi="http://doi.org/10.5281/zenodo.13331106"httpUri="https://zenodo.org/record/13331106/files/figure.png"pageId="1"pageNumber="120">4C, D</figureCitation>
); G1 sinuous, elongate, relatively slender; distal part gently curved, sharply tapering to rounded tip (
<figureCitationid="959B2A1E9B0CFF81CA3EFC06147EFC76"box="[512,635,978,1005]"captionStart="FIGURE 5"captionStartId="6.[151,250,1328,1352]"captionTargetBox="[158,1428,496,1298]"captionTargetId="figure-148@6.[151,1435,489,1305]"captionTargetPageId="6"captionText="FIGURE 5. Camptoplax ahmar sp. nov., holotype, male (9.7 × 8.0 mm) from Thuwal, Saudi Arabia, FLMNH UF 72875; A, pleon; B, left G1, ventral view; C, distal part of left G1, ventral view; D, distal part of left G1, dorsal view; E, left G2, ventral view. Scales: A = 1.0 mm; B, E = 0.5 mm; C, D = 0.2 mm."figureDoi="http://doi.org/10.5281/zenodo.13331109"httpUri="https://zenodo.org/record/13331109/files/figure.png"pageId="1"pageNumber="120">Fig. 5B–D</figureCitation>
<figureCitationid="959B2A1E9B0CFF81CA47FC2214D8FB8A"box="[633,733,1015,1041]"captionStart="FIGURE 1"captionStartId="2.[151,250,1912,1936]"captionTargetBox="[151,1436,179,1886]"captionTargetId="figure-20@2.[151,1436,179,1886]"captionTargetPageId="2"captionText="FIGURE 1. Camptoplax ahmar sp. nov., holotype, male (9.7 × 8.0 mm) from Thuwal, Saudi Arabia, FLMNH UF 72875, crab alive in dorsal (A), ventral (B) and frontal (C) views (right P2 missing). Photographs by AA."figureDoi="http://doi.org/10.5281/zenodo.13331100"httpUri="https://zenodo.org/record/13331100/files/figure.png"pageId="1"pageNumber="120">Figs. 1A</figureCitation>
,
<figureCitationid="959B2A1E9B0CFF81CAD7FC22152BFB8A"box="[745,814,1015,1041]"captionStart="FIGURE 2"captionStartId="3.[151,250,1772,1796]"captionTargetBox="[151,1435,181,1748]"captionTargetId="figure-17@3.[151,1435,181,1748]"captionTargetPageId="3"captionText="FIGURE 2. Camptoplax ahmar sp. nov., holotype, male (9.7 × 8.0 mm) from Thuwal, Saudi Arabia, FLMNH UF 72875; A, habitus, dorsal view (right P2 missing); B, carapace, dorsal view; C, right side of carapace, showing orbits and front, dorsal view; D, cephalothorax, frontal view; E, antennules, antenna, orbit, suborbital region and epistome, frontal view."figureDoi="http://doi.org/10.5281/zenodo.13331102"httpUri="https://zenodo.org/record/13331102/files/figure.png"pageId="1"pageNumber="120">2A, B</figureCitation>
), wider than long. Dorsal surface uneven, covered with flattened granules and rugosities, appearing finely eroded with pits; entire surface covered with dense, felt-like setae, and with 3 transverse swellings spanning entire carapace width: one at level of protogastric region stretching to epibranchial region, one across metagastric region reaching across mesobranchial region, and one across cardiac region stretching across metabranchial region, also forming 3 broad, shallow transverse depressions, anterior one being shallowest, with median parts relatively higher; gastro-cardiac grooves visible (
<figureCitationid="959B2A1E9B0CFF81CC7BFB7E12C3FB5E"box="[1093,1222,1195,1221]"captionStart="FIGURE 1"captionStartId="2.[151,250,1912,1936]"captionTargetBox="[151,1436,179,1886]"captionTargetId="figure-20@2.[151,1436,179,1886]"captionTargetPageId="2"captionText="FIGURE 1. Camptoplax ahmar sp. nov., holotype, male (9.7 × 8.0 mm) from Thuwal, Saudi Arabia, FLMNH UF 72875, crab alive in dorsal (A), ventral (B) and frontal (C) views (right P2 missing). Photographs by AA."figureDoi="http://doi.org/10.5281/zenodo.13331100"httpUri="https://zenodo.org/record/13331100/files/figure.png"pageId="1"pageNumber="120">Figs. 1A, C</figureCitation>
,
<figureCitationid="959B2A1E9B0CFF81CCEEFB7E1330FB5E"box="[1232,1333,1195,1221]"captionStart="FIGURE 2"captionStartId="3.[151,250,1772,1796]"captionTargetBox="[151,1435,181,1748]"captionTargetId="figure-17@3.[151,1435,181,1748]"captionTargetPageId="3"captionText="FIGURE 2. Camptoplax ahmar sp. nov., holotype, male (9.7 × 8.0 mm) from Thuwal, Saudi Arabia, FLMNH UF 72875; A, habitus, dorsal view (right P2 missing); B, carapace, dorsal view; C, right side of carapace, showing orbits and front, dorsal view; D, cephalothorax, frontal view; E, antennules, antenna, orbit, suborbital region and epistome, frontal view."figureDoi="http://doi.org/10.5281/zenodo.13331102"httpUri="https://zenodo.org/record/13331102/files/figure.png"pageId="1"pageNumber="120">2A, B, D</figureCitation>
). Median part lowest; branchial regions slightly higher in frontal view (
<figureCitationid="959B2A1E9B0CFF81CB68FB1A15BDFB72"box="[854,952,1231,1257]"captionStart="FIGURE 1"captionStartId="2.[151,250,1912,1936]"captionTargetBox="[151,1436,179,1886]"captionTargetId="figure-20@2.[151,1436,179,1886]"captionTargetPageId="2"captionText="FIGURE 1. Camptoplax ahmar sp. nov., holotype, male (9.7 × 8.0 mm) from Thuwal, Saudi Arabia, FLMNH UF 72875, crab alive in dorsal (A), ventral (B) and frontal (C) views (right P2 missing). Photographs by AA."figureDoi="http://doi.org/10.5281/zenodo.13331100"httpUri="https://zenodo.org/record/13331100/files/figure.png"pageId="1"pageNumber="120">Figs. 1C</figureCitation>
,
<figureCitationid="959B2A1E9B0CFF81CBF9FB1A15E8FB72"box="[967,1005,1231,1257]"captionStart="FIGURE 2"captionStartId="3.[151,250,1772,1796]"captionTargetBox="[151,1435,181,1748]"captionTargetId="figure-17@3.[151,1435,181,1748]"captionTargetPageId="3"captionText="FIGURE 2. Camptoplax ahmar sp. nov., holotype, male (9.7 × 8.0 mm) from Thuwal, Saudi Arabia, FLMNH UF 72875; A, habitus, dorsal view (right P2 missing); B, carapace, dorsal view; C, right side of carapace, showing orbits and front, dorsal view; D, cephalothorax, frontal view; E, antennules, antenna, orbit, suborbital region and epistome, frontal view."figureDoi="http://doi.org/10.5281/zenodo.13331102"httpUri="https://zenodo.org/record/13331102/files/figure.png"pageId="1"pageNumber="120">2D</figureCitation>
). Anterolateral margin convex, with 4 low teeth or lobes; first tooth (= external orbital tooth) very low, wide, almost straight, with granulated margin; second tooth dentiform, low; third tooth dentiform, low, with rounded tip; last tooth at junction of antero- and posterolateral margins very low, lobiform, broadly rounded (
<figureCitationid="959B2A1E9B0CFF81CB6EFAEE15DEFACE"box="[848,987,1339,1365]"captionStart="FIGURE 2"captionStartId="3.[151,250,1772,1796]"captionTargetBox="[151,1435,181,1748]"captionTargetId="figure-17@3.[151,1435,181,1748]"captionTargetPageId="3"captionText="FIGURE 2. Camptoplax ahmar sp. nov., holotype, male (9.7 × 8.0 mm) from Thuwal, Saudi Arabia, FLMNH UF 72875; A, habitus, dorsal view (right P2 missing); B, carapace, dorsal view; C, right side of carapace, showing orbits and front, dorsal view; D, cephalothorax, frontal view; E, antennules, antenna, orbit, suborbital region and epistome, frontal view."figureDoi="http://doi.org/10.5281/zenodo.13331102"httpUri="https://zenodo.org/record/13331102/files/figure.png"pageId="1"pageNumber="120">Figs. 2A–D</figureCitation>
). Posterolateral margin almost straight; lateral surfaces with low, oblique striae, distinctly converging to posterior carapace margin (
<figureCitationid="959B2A1E9B0CFF81CCF0FA8A1330FAE2"box="[1230,1333,1375,1401]"captionStart="FIGURE 1"captionStartId="2.[151,250,1912,1936]"captionTargetBox="[151,1436,179,1886]"captionTargetId="figure-20@2.[151,1436,179,1886]"captionTargetPageId="2"captionText="FIGURE 1. Camptoplax ahmar sp. nov., holotype, male (9.7 × 8.0 mm) from Thuwal, Saudi Arabia, FLMNH UF 72875, crab alive in dorsal (A), ventral (B) and frontal (C) views (right P2 missing). Photographs by AA."figureDoi="http://doi.org/10.5281/zenodo.13331100"httpUri="https://zenodo.org/record/13331100/files/figure.png"pageId="1"pageNumber="120">Figs. 1A</figureCitation>
,
<figureCitationid="959B2A1E9B0CFF81CD7BFA8A138BFAE2"box="[1349,1422,1375,1401]"captionStart="FIGURE 2"captionStartId="3.[151,250,1772,1796]"captionTargetBox="[151,1435,181,1748]"captionTargetId="figure-17@3.[151,1435,181,1748]"captionTargetPageId="3"captionText="FIGURE 2. Camptoplax ahmar sp. nov., holotype, male (9.7 × 8.0 mm) from Thuwal, Saudi Arabia, FLMNH UF 72875; A, habitus, dorsal view (right P2 missing); B, carapace, dorsal view; C, right side of carapace, showing orbits and front, dorsal view; D, cephalothorax, frontal view; E, antennules, antenna, orbit, suborbital region and epistome, frontal view."figureDoi="http://doi.org/10.5281/zenodo.13331102"httpUri="https://zenodo.org/record/13331102/files/figure.png"pageId="1"pageNumber="120">2A, B</figureCitation>
). Frontal margin prominently projecting anteriorly; margin clearly beyond base of orbit; lateral lobe small, barely visible in dorsal view, separated by shallow groove (
<figureCitationid="959B2A1E9B0CFF81CAC8FA721559FA5A"box="[758,860,1447,1473]"captionStart="FIGURE 1"captionStartId="2.[151,250,1912,1936]"captionTargetBox="[151,1436,179,1886]"captionTargetId="figure-20@2.[151,1436,179,1886]"captionTargetPageId="2"captionText="FIGURE 1. Camptoplax ahmar sp. nov., holotype, male (9.7 × 8.0 mm) from Thuwal, Saudi Arabia, FLMNH UF 72875, crab alive in dorsal (A), ventral (B) and frontal (C) views (right P2 missing). Photographs by AA."figureDoi="http://doi.org/10.5281/zenodo.13331100"httpUri="https://zenodo.org/record/13331100/files/figure.png"pageId="1"pageNumber="120">Figs. 1A</figureCitation>
,
<figureCitationid="959B2A1E9B0CFF81CB54FA7215ABFA5A"box="[874,942,1447,1473]"captionStart="FIGURE 2"captionStartId="3.[151,250,1772,1796]"captionTargetBox="[151,1435,181,1748]"captionTargetId="figure-17@3.[151,1435,181,1748]"captionTargetPageId="3"captionText="FIGURE 2. Camptoplax ahmar sp. nov., holotype, male (9.7 × 8.0 mm) from Thuwal, Saudi Arabia, FLMNH UF 72875; A, habitus, dorsal view (right P2 missing); B, carapace, dorsal view; C, right side of carapace, showing orbits and front, dorsal view; D, cephalothorax, frontal view; E, antennules, antenna, orbit, suborbital region and epistome, frontal view."figureDoi="http://doi.org/10.5281/zenodo.13331102"httpUri="https://zenodo.org/record/13331102/files/figure.png"pageId="1"pageNumber="120">2B–E</figureCitation>
). Supraorbital margin short, concave, lined with granules, without obvious notch or fissure (
<figureCitationid="959B2A1E9B0CFF81CAFCFA1E153BFA7E"box="[706,830,1483,1509]"captionStart="FIGURE 2"captionStartId="3.[151,250,1772,1796]"captionTargetBox="[151,1435,181,1748]"captionTargetId="figure-17@3.[151,1435,181,1748]"captionTargetPageId="3"captionText="FIGURE 2. Camptoplax ahmar sp. nov., holotype, male (9.7 × 8.0 mm) from Thuwal, Saudi Arabia, FLMNH UF 72875; A, habitus, dorsal view (right P2 missing); B, carapace, dorsal view; C, right side of carapace, showing orbits and front, dorsal view; D, cephalothorax, frontal view; E, antennules, antenna, orbit, suborbital region and epistome, frontal view."figureDoi="http://doi.org/10.5281/zenodo.13331102"httpUri="https://zenodo.org/record/13331102/files/figure.png"pageId="1"pageNumber="120">Fig. 2B, C</figureCitation>
<figureCitationid="959B2A1E9B0CFF81CD5AF9C616DEF9CA"captionStart="FIGURE 2"captionStartId="3.[151,250,1772,1796]"captionTargetBox="[151,1435,181,1748]"captionTargetId="figure-17@3.[151,1435,181,1748]"captionTargetPageId="3"captionText="FIGURE 2. Camptoplax ahmar sp. nov., holotype, male (9.7 × 8.0 mm) from Thuwal, Saudi Arabia, FLMNH UF 72875; A, habitus, dorsal view (right P2 missing); B, carapace, dorsal view; C, right side of carapace, showing orbits and front, dorsal view; D, cephalothorax, frontal view; E, antennules, antenna, orbit, suborbital region and epistome, frontal view."figureDoi="http://doi.org/10.5281/zenodo.13331102"httpUri="https://zenodo.org/record/13331102/files/figure.png"pageId="1"pageNumber="120">Figs. 2D, E</figureCitation>
,
<figureCitationid="959B2A1E9B0CFF81C8D6F9E2172BF9CA"box="[232,302,1591,1617]"captionStart="FIGURE 3"captionStartId="4.[151,250,1856,1880]"captionTargetBox="[151,1435,181,1832]"captionTargetId="figure-20@4.[151,1435,181,1832]"captionTargetPageId="4"captionText="FIGURE 3. Camptoplax ahmar sp. nov., holotype, male (9.7 × 8.0 mm) from Thuwal, Saudi Arabia, FLMNH UF 72875; A, antennules, antenna, orbit, suborbital region and epistome (denuded), frontal view; B, right third maxilliped (denuded), outer view; C, cephalothorax, anteroventral view; D, posterior thoracic sternum and pleonal somites 1–5, showing exposed sternite 8 (denuded), ventral view; E, anterior thoracic sternum and sternopleonal cavity, showing right G1 (denuded) in situ, ventral view."figureDoi="http://doi.org/10.5281/zenodo.13331104"httpUri="https://zenodo.org/record/13331104/files/figure.png"pageId="1"pageNumber="120">3A, C</figureCitation>
). Basal antennal article subrectangular, lodged into orbital hiatus; flagellum just entering orbit (
<figureCitationid="959B2A1E9B0CFF81CD5AF9E216DEF9EE"captionStart="FIGURE 2"captionStartId="3.[151,250,1772,1796]"captionTargetBox="[151,1435,181,1748]"captionTargetId="figure-17@3.[151,1435,181,1748]"captionTargetPageId="3"captionText="FIGURE 2. Camptoplax ahmar sp. nov., holotype, male (9.7 × 8.0 mm) from Thuwal, Saudi Arabia, FLMNH UF 72875; A, habitus, dorsal view (right P2 missing); B, carapace, dorsal view; C, right side of carapace, showing orbits and front, dorsal view; D, cephalothorax, frontal view; E, antennules, antenna, orbit, suborbital region and epistome, frontal view."figureDoi="http://doi.org/10.5281/zenodo.13331102"httpUri="https://zenodo.org/record/13331102/files/figure.png"pageId="1"pageNumber="120">Figs. 2D, E</figureCitation>
,
<figureCitationid="959B2A1E9B0CFF81C8D6F98E170BF9EE"box="[232,270,1627,1653]"captionStart="FIGURE 3"captionStartId="4.[151,250,1856,1880]"captionTargetBox="[151,1435,181,1832]"captionTargetId="figure-20@4.[151,1435,181,1832]"captionTargetPageId="4"captionText="FIGURE 3. Camptoplax ahmar sp. nov., holotype, male (9.7 × 8.0 mm) from Thuwal, Saudi Arabia, FLMNH UF 72875; A, antennules, antenna, orbit, suborbital region and epistome (denuded), frontal view; B, right third maxilliped (denuded), outer view; C, cephalothorax, anteroventral view; D, posterior thoracic sternum and pleonal somites 1–5, showing exposed sternite 8 (denuded), ventral view; E, anterior thoracic sternum and sternopleonal cavity, showing right G1 (denuded) in situ, ventral view."figureDoi="http://doi.org/10.5281/zenodo.13331104"httpUri="https://zenodo.org/record/13331104/files/figure.png"pageId="1"pageNumber="120">3A</figureCitation>
). Orbit short; orbital peduncle short, stout; cornea well developed (
<figureCitationid="959B2A1E9B0CFF81CC3BF98E128FF9EE"box="[1029,1162,1627,1653]"captionStart="FIGURE 2"captionStartId="3.[151,250,1772,1796]"captionTargetBox="[151,1435,181,1748]"captionTargetId="figure-17@3.[151,1435,181,1748]"captionTargetPageId="3"captionText="FIGURE 2. Camptoplax ahmar sp. nov., holotype, male (9.7 × 8.0 mm) from Thuwal, Saudi Arabia, FLMNH UF 72875; A, habitus, dorsal view (right P2 missing); B, carapace, dorsal view; C, right side of carapace, showing orbits and front, dorsal view; D, cephalothorax, frontal view; E, antennules, antenna, orbit, suborbital region and epistome, frontal view."figureDoi="http://doi.org/10.5281/zenodo.13331102"httpUri="https://zenodo.org/record/13331102/files/figure.png"pageId="1"pageNumber="120">Figs. 2B–D</figureCitation>
,
<figureCitationid="959B2A1E9B0CFF81CCA9F98E12B9F9EE"box="[1175,1212,1627,1653]"captionStart="FIGURE 3"captionStartId="4.[151,250,1856,1880]"captionTargetBox="[151,1435,181,1832]"captionTargetId="figure-20@4.[151,1435,181,1832]"captionTargetPageId="4"captionText="FIGURE 3. Camptoplax ahmar sp. nov., holotype, male (9.7 × 8.0 mm) from Thuwal, Saudi Arabia, FLMNH UF 72875; A, antennules, antenna, orbit, suborbital region and epistome (denuded), frontal view; B, right third maxilliped (denuded), outer view; C, cephalothorax, anteroventral view; D, posterior thoracic sternum and pleonal somites 1–5, showing exposed sternite 8 (denuded), ventral view; E, anterior thoracic sternum and sternopleonal cavity, showing right G1 (denuded) in situ, ventral view."figureDoi="http://doi.org/10.5281/zenodo.13331104"httpUri="https://zenodo.org/record/13331104/files/figure.png"pageId="1"pageNumber="120">3A</figureCitation>
). Epistome distinct, posterior margin with broadly triangular median lobe, with shallow median fissure, separated from lateral parts by wide concavities, shallow fissure present slightly mesial to concavities (
<figureCitationid="959B2A1E9B0CFF81CBE8F976125BF926"box="[982,1118,1699,1725]"captionStart="FIGURE 2"captionStartId="3.[151,250,1772,1796]"captionTargetBox="[151,1435,181,1748]"captionTargetId="figure-17@3.[151,1435,181,1748]"captionTargetPageId="3"captionText="FIGURE 2. Camptoplax ahmar sp. nov., holotype, male (9.7 × 8.0 mm) from Thuwal, Saudi Arabia, FLMNH UF 72875; A, habitus, dorsal view (right P2 missing); B, carapace, dorsal view; C, right side of carapace, showing orbits and front, dorsal view; D, cephalothorax, frontal view; E, antennules, antenna, orbit, suborbital region and epistome, frontal view."figureDoi="http://doi.org/10.5281/zenodo.13331102"httpUri="https://zenodo.org/record/13331102/files/figure.png"pageId="1"pageNumber="120">Figs. 2D, E</figureCitation>
,
<figureCitationid="959B2A1E9B0CFF81CC53F9761296F926"box="[1133,1171,1699,1725]"captionStart="FIGURE 3"captionStartId="4.[151,250,1856,1880]"captionTargetBox="[151,1435,181,1832]"captionTargetId="figure-20@4.[151,1435,181,1832]"captionTargetPageId="4"captionText="FIGURE 3. Camptoplax ahmar sp. nov., holotype, male (9.7 × 8.0 mm) from Thuwal, Saudi Arabia, FLMNH UF 72875; A, antennules, antenna, orbit, suborbital region and epistome (denuded), frontal view; B, right third maxilliped (denuded), outer view; C, cephalothorax, anteroventral view; D, posterior thoracic sternum and pleonal somites 1–5, showing exposed sternite 8 (denuded), ventral view; E, anterior thoracic sternum and sternopleonal cavity, showing right G1 (denuded) in situ, ventral view."figureDoi="http://doi.org/10.5281/zenodo.13331104"httpUri="https://zenodo.org/record/13331104/files/figure.png"pageId="1"pageNumber="120">3A</figureCitation>
Third maxilliped covered with short setae, latter not concealing margin; ischium rectangular, with shallow median oblique depression; inner margin serrate; merus quadrate, anteroexternal angle distinct, produced but not obviously auriculiform; exopod relatively stout, reaching to distal edge of merus, with long flagellum (
<figureCitationid="959B2A1E9B0CFF81CD0CF8E6139DF8D6"box="[1330,1432,1843,1869]"captionStart="FIGURE 2"captionStartId="3.[151,250,1772,1796]"captionTargetBox="[151,1435,181,1748]"captionTargetId="figure-17@3.[151,1435,181,1748]"captionTargetPageId="3"captionText="FIGURE 2. Camptoplax ahmar sp. nov., holotype, male (9.7 × 8.0 mm) from Thuwal, Saudi Arabia, FLMNH UF 72875; A, habitus, dorsal view (right P2 missing); B, carapace, dorsal view; C, right side of carapace, showing orbits and front, dorsal view; D, cephalothorax, frontal view; E, antennules, antenna, orbit, suborbital region and epistome, frontal view."figureDoi="http://doi.org/10.5281/zenodo.13331102"httpUri="https://zenodo.org/record/13331102/files/figure.png"pageId="1"pageNumber="120">Figs. 2D</figureCitation>
,
<figureCitationid="959B2A1E9B0CFF81C8A9F88216D9F8EA"box="[151,220,1879,1905]"captionStart="FIGURE 3"captionStartId="4.[151,250,1856,1880]"captionTargetBox="[151,1435,181,1832]"captionTargetId="figure-20@4.[151,1435,181,1832]"captionTargetPageId="4"captionText="FIGURE 3. Camptoplax ahmar sp. nov., holotype, male (9.7 × 8.0 mm) from Thuwal, Saudi Arabia, FLMNH UF 72875; A, antennules, antenna, orbit, suborbital region and epistome (denuded), frontal view; B, right third maxilliped (denuded), outer view; C, cephalothorax, anteroventral view; D, posterior thoracic sternum and pleonal somites 1–5, showing exposed sternite 8 (denuded), ventral view; E, anterior thoracic sternum and sternopleonal cavity, showing right G1 (denuded) in situ, ventral view."figureDoi="http://doi.org/10.5281/zenodo.13331104"httpUri="https://zenodo.org/record/13331104/files/figure.png"pageId="1"pageNumber="120">3B, C</figureCitation>
<taxonomicNameid="CAA04D189B0FFF82C927F8AD17DBF80B"authorityName="Ng & Anker"authorityYear="2024"box="[281,478,1912,1936]"class="Malacostraca"family="Pilumnidae"genus="Camptoplax"kingdom="Animalia"order="Decapoda"pageId="2"pageNumber="121"phylum="Arthropoda"rank="species"species="ahmar"status="sp. nov.">
<taxonomicNameid="CAA04D189B0EFF83C925F93917E4F89F"authorityName="Ng & Anker"authorityYear="2024"box="[283,481,1772,1796]"class="Malacostraca"family="Pilumnidae"genus="Camptoplax"kingdom="Animalia"order="Decapoda"pageId="3"pageNumber="122"phylum="Arthropoda"rank="species"species="ahmar"status="sp. nov.">
, holotype, male (9.7 × 8.0 mm) from Thuwal, Saudi Arabia, FLMNH UF 72875; A, habitus, dorsal view (right P2 missing); B, carapace, dorsal view; C, right side of carapace, showing orbits and front, dorsal view; D, cephalothorax, frontal view; E, antennules, antenna, orbit, suborbital region and epistome, frontal view.
<taxonomicNameid="CAA04D189B09FF84C925F89517E4F8C3"authorityName="Ng & Anker"authorityYear="2024"box="[283,481,1856,1880]"class="Malacostraca"family="Pilumnidae"genus="Camptoplax"kingdom="Animalia"order="Decapoda"pageId="4"pageNumber="123"phylum="Arthropoda"rank="species"species="ahmar"status="sp. nov.">
<taxonomicNameid="CAA04D189B08FF85C925FB9C17E4FBFA"authorityName="Ng & Anker"authorityYear="2024"box="[283,481,1097,1121]"class="Malacostraca"family="Pilumnidae"genus="Camptoplax"kingdom="Animalia"order="Decapoda"pageId="5"pageNumber="124"phylum="Arthropoda"rank="species"species="ahmar"status="sp. nov.">
, holotype, male (9.7 × 8.0 mm) from Thuwal, Saudi Arabia, FLMNH UF 72875; A, right and left chelae, outer view; B, right cheliped (partially denuded), dorsal view; C, right P4 (partially denuded), dorsal view; D, right P5 (partially denuded), dorsal view.
Thoracic sternites densely covered with very short setae; sternites 1 and 2 completely fused, their lateral margins sinuous; suture between sternites 2 and 3 gently convex towards buccal cavity; sternites 3 and 4 demarcated by shallow, oblique groove; sternopleonal cavity deep, reaching to imaginary line connecting proximo-distal edge of coxae of chelipeds; tubercle of pleonal locking mechanism round, on proximal third of sternite 5; sternite 8 visible as subrectangular plate when pleon closed (
<figureCitationid="959B2A1E9B08FF85CAAFFA5E14F0FA3D"box="[657,757,1419,1446]"captionStart="FIGURE 1"captionStartId="2.[151,250,1912,1936]"captionTargetBox="[151,1436,179,1886]"captionTargetId="figure-20@2.[151,1436,179,1886]"captionTargetPageId="2"captionText="FIGURE 1. Camptoplax ahmar sp. nov., holotype, male (9.7 × 8.0 mm) from Thuwal, Saudi Arabia, FLMNH UF 72875, crab alive in dorsal (A), ventral (B) and frontal (C) views (right P2 missing). Photographs by AA."figureDoi="http://doi.org/10.5281/zenodo.13331100"httpUri="https://zenodo.org/record/13331100/files/figure.png"pageId="5"pageNumber="124">Figs. 1B</figureCitation>
,
<figureCitationid="959B2A1E9B08FF85CB3BFA59154CFA3D"box="[773,841,1420,1446]"captionStart="FIGURE 3"captionStartId="4.[151,250,1856,1880]"captionTargetBox="[151,1435,181,1832]"captionTargetId="figure-20@4.[151,1435,181,1832]"captionTargetPageId="4"captionText="FIGURE 3. Camptoplax ahmar sp. nov., holotype, male (9.7 × 8.0 mm) from Thuwal, Saudi Arabia, FLMNH UF 72875; A, antennules, antenna, orbit, suborbital region and epistome (denuded), frontal view; B, right third maxilliped (denuded), outer view; C, cephalothorax, anteroventral view; D, posterior thoracic sternum and pleonal somites 1–5, showing exposed sternite 8 (denuded), ventral view; E, anterior thoracic sternum and sternopleonal cavity, showing right G1 (denuded) in situ, ventral view."figureDoi="http://doi.org/10.5281/zenodo.13331104"httpUri="https://zenodo.org/record/13331104/files/figure.png"pageId="5"pageNumber="124">3C–E</figureCitation>
). Penis relatively short, exiting from condyle of P5 coxa.
Chelipeds relatively short, subsymmetrical in shape, subequal in size, right slightly larger; outer surfaces covered with flattened rounded granules and short, felt-like setae partially obscuring margins and surface, however, leaving most granules visible; inner surface of carpus and chela smooth, that of merus rugose (
<figureCitationid="959B2A1E9B08FF85CCEEF9CE1333F9AD"box="[1232,1334,1563,1590]"captionStart="FIGURE 1"captionStartId="2.[151,250,1912,1936]"captionTargetBox="[151,1436,179,1886]"captionTargetId="figure-20@2.[151,1436,179,1886]"captionTargetPageId="2"captionText="FIGURE 1. Camptoplax ahmar sp. nov., holotype, male (9.7 × 8.0 mm) from Thuwal, Saudi Arabia, FLMNH UF 72875, crab alive in dorsal (A), ventral (B) and frontal (C) views (right P2 missing). Photographs by AA."figureDoi="http://doi.org/10.5281/zenodo.13331100"httpUri="https://zenodo.org/record/13331100/files/figure.png"pageId="5"pageNumber="124">Figs. 1A</figureCitation>
,
<figureCitationid="959B2A1E9B08FF85CD7DF9C91362F9AD"box="[1347,1383,1564,1590]"captionStart="FIGURE 2"captionStartId="3.[151,250,1772,1796]"captionTargetBox="[151,1435,181,1748]"captionTargetId="figure-17@3.[151,1435,181,1748]"captionTargetPageId="3"captionText="FIGURE 2. Camptoplax ahmar sp. nov., holotype, male (9.7 × 8.0 mm) from Thuwal, Saudi Arabia, FLMNH UF 72875; A, habitus, dorsal view (right P2 missing); B, carapace, dorsal view; C, right side of carapace, showing orbits and front, dorsal view; D, cephalothorax, frontal view; E, antennules, antenna, orbit, suborbital region and epistome, frontal view."figureDoi="http://doi.org/10.5281/zenodo.13331102"httpUri="https://zenodo.org/record/13331102/files/figure.png"pageId="5"pageNumber="124">2A</figureCitation>
,
<figureCitationid="959B2A1E9B08FF85CD4BF9C91392F9AD"box="[1397,1431,1564,1590]"captionStart="FIGURE 3"captionStartId="4.[151,250,1856,1880]"captionTargetBox="[151,1435,181,1832]"captionTargetId="figure-20@4.[151,1435,181,1832]"captionTargetPageId="4"captionText="FIGURE 3. Camptoplax ahmar sp. nov., holotype, male (9.7 × 8.0 mm) from Thuwal, Saudi Arabia, FLMNH UF 72875; A, antennules, antenna, orbit, suborbital region and epistome (denuded), frontal view; B, right third maxilliped (denuded), outer view; C, cephalothorax, anteroventral view; D, posterior thoracic sternum and pleonal somites 1–5, showing exposed sternite 8 (denuded), ventral view; E, anterior thoracic sternum and sternopleonal cavity, showing right G1 (denuded) in situ, ventral view."figureDoi="http://doi.org/10.5281/zenodo.13331104"httpUri="https://zenodo.org/record/13331104/files/figure.png"pageId="5"pageNumber="124">3C</figureCitation>
,
<figureCitationid="959B2A1E9B08FF85C8A9F99516D9F9C1"box="[151,220,1600,1626]"captionStart="FIGURE 4"captionStartId="5.[151,250,1097,1121]"captionTargetBox="[151,1435,181,1073]"captionTargetId="figure-17@5.[151,1435,181,1073]"captionTargetPageId="5"captionText="FIGURE 4. Camptoplax ahmar sp. nov., holotype, male (9.7 × 8.0 mm) from Thuwal, Saudi Arabia, FLMNH UF 72875; A, right and left chelae, outer view; B, right cheliped (partially denuded), dorsal view; C, right P4 (partially denuded), dorsal view; D, right P5 (partially denuded), dorsal view."figureDoi="http://doi.org/10.5281/zenodo.13331106"httpUri="https://zenodo.org/record/13331106/files/figure.png"pageId="5"pageNumber="124">4A, B</figureCitation>
). Margins of basis and ischium entire (
<figureCitationid="959B2A1E9B08FF85CAB2F9EA14E8F9C1"box="[652,749,1599,1626]"captionStart="FIGURE 1"captionStartId="2.[151,250,1912,1936]"captionTargetBox="[151,1436,179,1886]"captionTargetId="figure-20@2.[151,1436,179,1886]"captionTargetPageId="2"captionText="FIGURE 1. Camptoplax ahmar sp. nov., holotype, male (9.7 × 8.0 mm) from Thuwal, Saudi Arabia, FLMNH UF 72875, crab alive in dorsal (A), ventral (B) and frontal (C) views (right P2 missing). Photographs by AA."figureDoi="http://doi.org/10.5281/zenodo.13331100"httpUri="https://zenodo.org/record/13331100/files/figure.png"pageId="5"pageNumber="124">Figs. 1B</figureCitation>
,
<figureCitationid="959B2A1E9B08FF85CAC6F9951519F9C1"box="[760,796,1600,1626]"captionStart="FIGURE 3"captionStartId="4.[151,250,1856,1880]"captionTargetBox="[151,1435,181,1832]"captionTargetId="figure-20@4.[151,1435,181,1832]"captionTargetPageId="4"captionText="FIGURE 3. Camptoplax ahmar sp. nov., holotype, male (9.7 × 8.0 mm) from Thuwal, Saudi Arabia, FLMNH UF 72875; A, antennules, antenna, orbit, suborbital region and epistome (denuded), frontal view; B, right third maxilliped (denuded), outer view; C, cephalothorax, anteroventral view; D, posterior thoracic sternum and pleonal somites 1–5, showing exposed sternite 8 (denuded), ventral view; E, anterior thoracic sternum and sternopleonal cavity, showing right G1 (denuded) in situ, ventral view."figureDoi="http://doi.org/10.5281/zenodo.13331104"httpUri="https://zenodo.org/record/13331104/files/figure.png"pageId="5"pageNumber="124">3C</figureCitation>
). Merus short, with uneven but not serrate margins; distal angle of dorsal margin with low, rounded tubercle; subdistal edge of extensor margin with low tooth (
<figureCitationid="959B2A1E9B08FF85CD2CF9B6139DF9E5"box="[1298,1432,1635,1662]"captionStart="FIGURE 1"captionStartId="2.[151,250,1912,1936]"captionTargetBox="[151,1436,179,1886]"captionTargetId="figure-20@2.[151,1436,179,1886]"captionTargetPageId="2"captionText="FIGURE 1. Camptoplax ahmar sp. nov., holotype, male (9.7 × 8.0 mm) from Thuwal, Saudi Arabia, FLMNH UF 72875, crab alive in dorsal (A), ventral (B) and frontal (C) views (right P2 missing). Photographs by AA."figureDoi="http://doi.org/10.5281/zenodo.13331100"httpUri="https://zenodo.org/record/13331100/files/figure.png"pageId="5"pageNumber="124">Figs. 1A, B</figureCitation>
,
<figureCitationid="959B2A1E9B08FF85C8A9F95D16BEF939"box="[151,187,1672,1698]"captionStart="FIGURE 3"captionStartId="4.[151,250,1856,1880]"captionTargetBox="[151,1435,181,1832]"captionTargetId="figure-20@4.[151,1435,181,1832]"captionTargetPageId="4"captionText="FIGURE 3. Camptoplax ahmar sp. nov., holotype, male (9.7 × 8.0 mm) from Thuwal, Saudi Arabia, FLMNH UF 72875; A, antennules, antenna, orbit, suborbital region and epistome (denuded), frontal view; B, right third maxilliped (denuded), outer view; C, cephalothorax, anteroventral view; D, posterior thoracic sternum and pleonal somites 1–5, showing exposed sternite 8 (denuded), ventral view; E, anterior thoracic sternum and sternopleonal cavity, showing right G1 (denuded) in situ, ventral view."figureDoi="http://doi.org/10.5281/zenodo.13331104"httpUri="https://zenodo.org/record/13331104/files/figure.png"pageId="5"pageNumber="124">3C</figureCitation>
). Carpus surface slightly eroded, with smooth, sharp, triangular tooth on inner distal angle; outer angle slightly produced (
<figureCitationid="959B2A1E9B08FF85C930F97E1774F95D"box="[270,369,1707,1734]"captionStart="FIGURE 1"captionStartId="2.[151,250,1912,1936]"captionTargetBox="[151,1436,179,1886]"captionTargetId="figure-20@2.[151,1436,179,1886]"captionTargetPageId="2"captionText="FIGURE 1. Camptoplax ahmar sp. nov., holotype, male (9.7 × 8.0 mm) from Thuwal, Saudi Arabia, FLMNH UF 72875, crab alive in dorsal (A), ventral (B) and frontal (C) views (right P2 missing). Photographs by AA."figureDoi="http://doi.org/10.5281/zenodo.13331100"httpUri="https://zenodo.org/record/13331100/files/figure.png"pageId="5"pageNumber="124">Figs. 1A</figureCitation>
,
<figureCitationid="959B2A1E9B08FF85C942F97917A5F95D"box="[380,416,1708,1734]"captionStart="FIGURE 2"captionStartId="3.[151,250,1772,1796]"captionTargetBox="[151,1435,181,1748]"captionTargetId="figure-17@3.[151,1435,181,1748]"captionTargetPageId="3"captionText="FIGURE 2. Camptoplax ahmar sp. nov., holotype, male (9.7 × 8.0 mm) from Thuwal, Saudi Arabia, FLMNH UF 72875; A, habitus, dorsal view (right P2 missing); B, carapace, dorsal view; C, right side of carapace, showing orbits and front, dorsal view; D, cephalothorax, frontal view; E, antennules, antenna, orbit, suborbital region and epistome, frontal view."figureDoi="http://doi.org/10.5281/zenodo.13331102"httpUri="https://zenodo.org/record/13331102/files/figure.png"pageId="5"pageNumber="124">2A</figureCitation>
,
<figureCitationid="959B2A1E9B08FF85C995F97917CAF95D"box="[427,463,1708,1734]"captionStart="FIGURE 4"captionStartId="5.[151,250,1097,1121]"captionTargetBox="[151,1435,181,1073]"captionTargetId="figure-17@5.[151,1435,181,1073]"captionTargetPageId="5"captionText="FIGURE 4. Camptoplax ahmar sp. nov., holotype, male (9.7 × 8.0 mm) from Thuwal, Saudi Arabia, FLMNH UF 72875; A, right and left chelae, outer view; B, right cheliped (partially denuded), dorsal view; C, right P4 (partially denuded), dorsal view; D, right P5 (partially denuded), dorsal view."figureDoi="http://doi.org/10.5281/zenodo.13331106"httpUri="https://zenodo.org/record/13331106/files/figure.png"pageId="5"pageNumber="124">4B</figureCitation>
). Right chela relatively more swollen than minor chela, otherwise similar in form (
<figureCitationid="959B2A1E9B08FF85CD5AF97E16A0F971"captionStart="FIGURE 1"captionStartId="2.[151,250,1912,1936]"captionTargetBox="[151,1436,179,1886]"captionTargetId="figure-20@2.[151,1436,179,1886]"captionTargetPageId="2"captionText="FIGURE 1. Camptoplax ahmar sp. nov., holotype, male (9.7 × 8.0 mm) from Thuwal, Saudi Arabia, FLMNH UF 72875, crab alive in dorsal (A), ventral (B) and frontal (C) views (right P2 missing). Photographs by AA."figureDoi="http://doi.org/10.5281/zenodo.13331100"httpUri="https://zenodo.org/record/13331100/files/figure.png"pageId="5"pageNumber="124">Figs. 1</figureCitation>
,
<figureCitationid="959B2A1E9B08FF85C888F90516D9F971"box="[182,220,1744,1770]"captionStart="FIGURE 4"captionStartId="5.[151,250,1097,1121]"captionTargetBox="[151,1435,181,1073]"captionTargetId="figure-17@5.[151,1435,181,1073]"captionTargetPageId="5"captionText="FIGURE 4. Camptoplax ahmar sp. nov., holotype, male (9.7 × 8.0 mm) from Thuwal, Saudi Arabia, FLMNH UF 72875; A, right and left chelae, outer view; B, right cheliped (partially denuded), dorsal view; C, right P4 (partially denuded), dorsal view; D, right P5 (partially denuded), dorsal view."figureDoi="http://doi.org/10.5281/zenodo.13331106"httpUri="https://zenodo.org/record/13331106/files/figure.png"pageId="5"pageNumber="124">4A</figureCitation>
). Chela relatively elongate, fingers shorter than palm; outer surface with flattened granules covering most of surface of pollex except for distal-most part, covering proximal third of dactylus, with 2 low, uneven, rugose, longitudinal ridges; dorsal margin forming wide, low crest; inner surface longitudinally concave; cutting edges of fingers with low, rounded teeth (
<figureCitationid="959B2A1E9B08FF85CA3DF8EE1454F8CD"box="[515,593,1851,1878]"captionStart="FIGURE 1"captionStartId="2.[151,250,1912,1936]"captionTargetBox="[151,1436,179,1886]"captionTargetId="figure-20@2.[151,1436,179,1886]"captionTargetPageId="2"captionText="FIGURE 1. Camptoplax ahmar sp. nov., holotype, male (9.7 × 8.0 mm) from Thuwal, Saudi Arabia, FLMNH UF 72875, crab alive in dorsal (A), ventral (B) and frontal (C) views (right P2 missing). Photographs by AA."figureDoi="http://doi.org/10.5281/zenodo.13331100"httpUri="https://zenodo.org/record/13331100/files/figure.png"pageId="5"pageNumber="124">Figs. 1</figureCitation>
,
<figureCitationid="959B2A1E9B08FF85CA61F8E91486F8CD"box="[607,643,1852,1878]"captionStart="FIGURE 2"captionStartId="3.[151,250,1772,1796]"captionTargetBox="[151,1435,181,1748]"captionTargetId="figure-17@3.[151,1435,181,1748]"captionTargetPageId="3"captionText="FIGURE 2. Camptoplax ahmar sp. nov., holotype, male (9.7 × 8.0 mm) from Thuwal, Saudi Arabia, FLMNH UF 72875; A, habitus, dorsal view (right P2 missing); B, carapace, dorsal view; C, right side of carapace, showing orbits and front, dorsal view; D, cephalothorax, frontal view; E, antennules, antenna, orbit, suborbital region and epistome, frontal view."figureDoi="http://doi.org/10.5281/zenodo.13331102"httpUri="https://zenodo.org/record/13331102/files/figure.png"pageId="5"pageNumber="124">2A</figureCitation>
,
<figureCitationid="959B2A1E9B08FF85CAB1F8E914B4F8CD"box="[655,689,1852,1878]"captionStart="FIGURE 3"captionStartId="4.[151,250,1856,1880]"captionTargetBox="[151,1435,181,1832]"captionTargetId="figure-20@4.[151,1435,181,1832]"captionTargetPageId="4"captionText="FIGURE 3. Camptoplax ahmar sp. nov., holotype, male (9.7 × 8.0 mm) from Thuwal, Saudi Arabia, FLMNH UF 72875; A, antennules, antenna, orbit, suborbital region and epistome (denuded), frontal view; B, right third maxilliped (denuded), outer view; C, cephalothorax, anteroventral view; D, posterior thoracic sternum and pleonal somites 1–5, showing exposed sternite 8 (denuded), ventral view; E, anterior thoracic sternum and sternopleonal cavity, showing right G1 (denuded) in situ, ventral view."figureDoi="http://doi.org/10.5281/zenodo.13331104"httpUri="https://zenodo.org/record/13331104/files/figure.png"pageId="5"pageNumber="124">3C</figureCitation>
,
<figureCitationid="959B2A1E9B08FF85CA80F8E91506F8CD"box="[702,771,1852,1878]"captionStart="FIGURE 4"captionStartId="5.[151,250,1097,1121]"captionTargetBox="[151,1435,181,1073]"captionTargetId="figure-17@5.[151,1435,181,1073]"captionTargetPageId="5"captionText="FIGURE 4. Camptoplax ahmar sp. nov., holotype, male (9.7 × 8.0 mm) from Thuwal, Saudi Arabia, FLMNH UF 72875; A, right and left chelae, outer view; B, right cheliped (partially denuded), dorsal view; C, right P4 (partially denuded), dorsal view; D, right P5 (partially denuded), dorsal view."figureDoi="http://doi.org/10.5281/zenodo.13331106"httpUri="https://zenodo.org/record/13331106/files/figure.png"pageId="5"pageNumber="124">4A, B</figureCitation>
P2–P5 relatively short, P3 longest, P5 shortest, surfaces covered with short, felt-like setae obscuring surface and margins (
<figureCitationid="959B2A1E9B08FF85C93CF8561762F805"box="[258,359,1923,1950]"captionStart="FIGURE 1"captionStartId="2.[151,250,1912,1936]"captionTargetBox="[151,1436,179,1886]"captionTargetId="figure-20@2.[151,1436,179,1886]"captionTargetPageId="2"captionText="FIGURE 1. Camptoplax ahmar sp. nov., holotype, male (9.7 × 8.0 mm) from Thuwal, Saudi Arabia, FLMNH UF 72875, crab alive in dorsal (A), ventral (B) and frontal (C) views (right P2 missing). Photographs by AA."figureDoi="http://doi.org/10.5281/zenodo.13331100"httpUri="https://zenodo.org/record/13331100/files/figure.png"pageId="5"pageNumber="124">Figs. 1A</figureCitation>
,
<figureCitationid="959B2A1E9B08FF85C94AF851179DF805"box="[372,408,1924,1950]"captionStart="FIGURE 2"captionStartId="3.[151,250,1772,1796]"captionTargetBox="[151,1435,181,1748]"captionTargetId="figure-17@3.[151,1435,181,1748]"captionTargetPageId="3"captionText="FIGURE 2. Camptoplax ahmar sp. nov., holotype, male (9.7 × 8.0 mm) from Thuwal, Saudi Arabia, FLMNH UF 72875; A, habitus, dorsal view (right P2 missing); B, carapace, dorsal view; C, right side of carapace, showing orbits and front, dorsal view; D, cephalothorax, frontal view; E, antennules, antenna, orbit, suborbital region and epistome, frontal view."figureDoi="http://doi.org/10.5281/zenodo.13331102"httpUri="https://zenodo.org/record/13331102/files/figure.png"pageId="5"pageNumber="124">2A</figureCitation>
,
<figureCitationid="959B2A1E9B08FF85C998F85117CFF805"box="[422,458,1924,1950]"captionStart="FIGURE 3"captionStartId="4.[151,250,1856,1880]"captionTargetBox="[151,1435,181,1832]"captionTargetId="figure-20@4.[151,1435,181,1832]"captionTargetPageId="4"captionText="FIGURE 3. Camptoplax ahmar sp. nov., holotype, male (9.7 × 8.0 mm) from Thuwal, Saudi Arabia, FLMNH UF 72875; A, antennules, antenna, orbit, suborbital region and epistome (denuded), frontal view; B, right third maxilliped (denuded), outer view; C, cephalothorax, anteroventral view; D, posterior thoracic sternum and pleonal somites 1–5, showing exposed sternite 8 (denuded), ventral view; E, anterior thoracic sternum and sternopleonal cavity, showing right G1 (denuded) in situ, ventral view."figureDoi="http://doi.org/10.5281/zenodo.13331104"httpUri="https://zenodo.org/record/13331104/files/figure.png"pageId="5"pageNumber="124">3C</figureCitation>
). Merus with extensor and flexor margins smooth, gently cristate, unarmed; P4 merus length 2.98 times width; P5 merus length 2.94 times width; carpus with low, submarginal crest and adjacent shallow furrow; propodus elongate, laterally flattened, with low, submarginal ridge; P2–P4 propodus elongate, P4 propodus length 2.63 times width; P5 propodus short, ovate, length 1.80 times width; dactylo-propodal lock visible; P2–P4 dactylus long, falciform, length 1.07 times width; P5 dactylus short, straight, length 0.94 times width (
<figureCitationid="959B2A1E9B0BFF86CD3BFF6E136DFF4E"box="[1285,1384,187,213]"captionStart="FIGURE 1"captionStartId="2.[151,250,1912,1936]"captionTargetBox="[151,1436,179,1886]"captionTargetId="figure-20@2.[151,1436,179,1886]"captionTargetPageId="2"captionText="FIGURE 1. Camptoplax ahmar sp. nov., holotype, male (9.7 × 8.0 mm) from Thuwal, Saudi Arabia, FLMNH UF 72875, crab alive in dorsal (A), ventral (B) and frontal (C) views (right P2 missing). Photographs by AA."figureDoi="http://doi.org/10.5281/zenodo.13331100"httpUri="https://zenodo.org/record/13331100/files/figure.png"pageId="6"pageNumber="125">Figs. 1A</figureCitation>
,
<figureCitationid="959B2A1E9B0BFF86CD4DFF6E1392FF4E"box="[1395,1431,187,213]"captionStart="FIGURE 2"captionStartId="3.[151,250,1772,1796]"captionTargetBox="[151,1435,181,1748]"captionTargetId="figure-17@3.[151,1435,181,1748]"captionTargetPageId="3"captionText="FIGURE 2. Camptoplax ahmar sp. nov., holotype, male (9.7 × 8.0 mm) from Thuwal, Saudi Arabia, FLMNH UF 72875; A, habitus, dorsal view (right P2 missing); B, carapace, dorsal view; C, right side of carapace, showing orbits and front, dorsal view; D, cephalothorax, frontal view; E, antennules, antenna, orbit, suborbital region and epistome, frontal view."figureDoi="http://doi.org/10.5281/zenodo.13331102"httpUri="https://zenodo.org/record/13331102/files/figure.png"pageId="6"pageNumber="125">2A</figureCitation>
,
<figureCitationid="959B2A1E9B0BFF86C8A9FF0A16BFFF62"box="[151,186,223,249]"captionStart="FIGURE 3"captionStartId="4.[151,250,1856,1880]"captionTargetBox="[151,1435,181,1832]"captionTargetId="figure-20@4.[151,1435,181,1832]"captionTargetPageId="4"captionText="FIGURE 3. Camptoplax ahmar sp. nov., holotype, male (9.7 × 8.0 mm) from Thuwal, Saudi Arabia, FLMNH UF 72875; A, antennules, antenna, orbit, suborbital region and epistome (denuded), frontal view; B, right third maxilliped (denuded), outer view; C, cephalothorax, anteroventral view; D, posterior thoracic sternum and pleonal somites 1–5, showing exposed sternite 8 (denuded), ventral view; E, anterior thoracic sternum and sternopleonal cavity, showing right G1 (denuded) in situ, ventral view."figureDoi="http://doi.org/10.5281/zenodo.13331104"httpUri="https://zenodo.org/record/13331104/files/figure.png"pageId="6"pageNumber="125">3C</figureCitation>
,
<figureCitationid="959B2A1E9B0BFF86C8F8FF0A1708FF62"box="[198,269,223,249]"captionStart="FIGURE 4"captionStartId="5.[151,250,1097,1121]"captionTargetBox="[151,1435,181,1073]"captionTargetId="figure-17@5.[151,1435,181,1073]"captionTargetPageId="5"captionText="FIGURE 4. Camptoplax ahmar sp. nov., holotype, male (9.7 × 8.0 mm) from Thuwal, Saudi Arabia, FLMNH UF 72875; A, right and left chelae, outer view; B, right cheliped (partially denuded), dorsal view; C, right P4 (partially denuded), dorsal view; D, right P5 (partially denuded), dorsal view."figureDoi="http://doi.org/10.5281/zenodo.13331106"httpUri="https://zenodo.org/record/13331106/files/figure.png"pageId="6"pageNumber="125">4C, D</figureCitation>
Pleon triangular; somite 1 wide, subrectangular, reaching to base of P5 coxae; somite 2 transversely ovate, narrower than somite 1; somite 3 trapezoidal, as wide as somite 1; somites 4–6 trapezoidal, gradually decreasing in width; telson triangular, as long as somite 6, with convex lateral margins and proximal margin slightly wider than somite 6 (
<figureCitationid="959B2A1E9B0BFF86C938FEBA176DFE12"box="[262,360,367,393]"captionStart="FIGURE 1"captionStartId="2.[151,250,1912,1936]"captionTargetBox="[151,1436,179,1886]"captionTargetId="figure-20@2.[151,1436,179,1886]"captionTargetPageId="2"captionText="FIGURE 1. Camptoplax ahmar sp. nov., holotype, male (9.7 × 8.0 mm) from Thuwal, Saudi Arabia, FLMNH UF 72875, crab alive in dorsal (A), ventral (B) and frontal (C) views (right P2 missing). Photographs by AA."figureDoi="http://doi.org/10.5281/zenodo.13331100"httpUri="https://zenodo.org/record/13331100/files/figure.png"pageId="6"pageNumber="125">Figs. 1B</figureCitation>
,
<figureCitationid="959B2A1E9B0BFF86C94AFEBA17BFFE12"box="[372,442,367,393]"captionStart="FIGURE 3"captionStartId="4.[151,250,1856,1880]"captionTargetBox="[151,1435,181,1832]"captionTargetId="figure-20@4.[151,1435,181,1832]"captionTargetPageId="4"captionText="FIGURE 3. Camptoplax ahmar sp. nov., holotype, male (9.7 × 8.0 mm) from Thuwal, Saudi Arabia, FLMNH UF 72875; A, antennules, antenna, orbit, suborbital region and epistome (denuded), frontal view; B, right third maxilliped (denuded), outer view; C, cephalothorax, anteroventral view; D, posterior thoracic sternum and pleonal somites 1–5, showing exposed sternite 8 (denuded), ventral view; E, anterior thoracic sternum and sternopleonal cavity, showing right G1 (denuded) in situ, ventral view."figureDoi="http://doi.org/10.5281/zenodo.13331104"httpUri="https://zenodo.org/record/13331104/files/figure.png"pageId="6"pageNumber="125">3C, D</figureCitation>
,
<figureCitationid="959B2A1E9B0BFF86C9FBFEBB17EEFE12"box="[453,491,366,393]"captionStart="FIGURE 5"captionStartId="6.[151,250,1328,1352]"captionTargetBox="[158,1428,496,1298]"captionTargetId="figure-148@6.[151,1435,489,1305]"captionTargetPageId="6"captionText="FIGURE 5. Camptoplax ahmar sp. nov., holotype, male (9.7 × 8.0 mm) from Thuwal, Saudi Arabia, FLMNH UF 72875; A, pleon; B, left G1, ventral view; C, distal part of left G1, ventral view; D, distal part of left G1, dorsal view; E, left G2, ventral view. Scales: A = 1.0 mm; B, E = 0.5 mm; C, D = 0.2 mm."figureDoi="http://doi.org/10.5281/zenodo.13331109"httpUri="https://zenodo.org/record/13331109/files/figure.png"pageId="6"pageNumber="125">5A</figureCitation>
G1 sinuous, elongate, relatively slender; distal part gently curved, sharply tapering to rounded tip, margins lined with stiff spines (
<figureCitationid="959B2A1E9B0BFF86C967FE6217D1FE4A"box="[345,468,438,465]"captionStart="FIGURE 5"captionStartId="6.[151,250,1328,1352]"captionTargetBox="[158,1428,496,1298]"captionTargetId="figure-148@6.[151,1435,489,1305]"captionTargetPageId="6"captionText="FIGURE 5. Camptoplax ahmar sp. nov., holotype, male (9.7 × 8.0 mm) from Thuwal, Saudi Arabia, FLMNH UF 72875; A, pleon; B, left G1, ventral view; C, distal part of left G1, ventral view; D, distal part of left G1, dorsal view; E, left G2, ventral view. Scales: A = 1.0 mm; B, E = 0.5 mm; C, D = 0.2 mm."figureDoi="http://doi.org/10.5281/zenodo.13331109"httpUri="https://zenodo.org/record/13331109/files/figure.png"pageId="6"pageNumber="125">Fig. 5B–D</figureCitation>
). G2 short, sigmoid, distal part spatuliform, with short flagellum (
<figureCitationid="959B2A1E9B0BFF86CC89FE621308FE4A"box="[1207,1293,438,465]"captionStart="FIGURE 5"captionStartId="6.[151,250,1328,1352]"captionTargetBox="[158,1428,496,1298]"captionTargetId="figure-148@6.[151,1435,489,1305]"captionTargetPageId="6"captionText="FIGURE 5. Camptoplax ahmar sp. nov., holotype, male (9.7 × 8.0 mm) from Thuwal, Saudi Arabia, FLMNH UF 72875; A, pleon; B, left G1, ventral view; C, distal part of left G1, ventral view; D, distal part of left G1, dorsal view; E, left G2, ventral view. Scales: A = 1.0 mm; B, E = 0.5 mm; C, D = 0.2 mm."figureDoi="http://doi.org/10.5281/zenodo.13331109"httpUri="https://zenodo.org/record/13331109/files/figure.png"pageId="6"pageNumber="125">Fig. 5E</figureCitation>
<taxonomicNameid="CAA04D189B0BFF86C925FAE517E4FAD3"authorityName="Ng & Anker"authorityYear="2024"box="[283,481,1328,1352]"class="Malacostraca"family="Pilumnidae"genus="Camptoplax"kingdom="Animalia"order="Decapoda"pageId="6"pageNumber="125"phylum="Arthropoda"rank="species"species="ahmar"status="sp. nov.">
, holotype, male (9.7 × 8.0 mm) from Thuwal, Saudi Arabia, FLMNH UF 72875; A, pleon; B, left G1, ventral view; C, distal part of left G1, ventral view; D, distal part of left G1, dorsal view; E, left G2, ventral view. Scales: A = 1.0 mm; B, E = 0.5 mm; C, D = 0.2 mm.
<emphasisid="3FD4EA899B0BFF86C8F9FA37176DFA67"bold="true"box="[199,360,1506,1532]"pageId="6"pageNumber="125">Colour in life</emphasis>
. Overall straw yellowish with some slightly darker, pale brown areas; scarce reddish dots and small reddish patches present on some areas of dorsal and pterygostomian surface of carapace and extensor margins of P2–P5; posterior margin of epistome with 2 conspicuous red dots on median section and 2 red patches laterally (
<figureCitationid="959B2A1E9B0BFF86C8A1F99B16E4F9F3"box="[159,225,1614,1640]"captionStart="FIGURE 1"captionStartId="2.[151,250,1912,1936]"captionTargetBox="[151,1436,179,1886]"captionTargetId="figure-20@2.[151,1436,179,1886]"captionTargetPageId="2"captionText="FIGURE 1. Camptoplax ahmar sp. nov., holotype, male (9.7 × 8.0 mm) from Thuwal, Saudi Arabia, FLMNH UF 72875, crab alive in dorsal (A), ventral (B) and frontal (C) views (right P2 missing). Photographs by AA."figureDoi="http://doi.org/10.5281/zenodo.13331100"httpUri="https://zenodo.org/record/13331100/files/figure.png"pageId="6"pageNumber="125">Fig. 1</figureCitation>
<taxonomicNameid="CAA04D189B0BFF86C8E6F9431728F92B"authorityName="Ng & Anker"authorityYear="2024"box="[216,301,1686,1712]"class="Malacostraca"family="Pilumnidae"genus="Camptoplax"kingdom="Animalia"order="Decapoda"pageId="6"pageNumber="125"phylum="Arthropoda"rank="species"species="ahmar">“ahmar</taxonomicName>
<taxonomicNameid="CAA04D189B0BFF86C8A9F90A1706F963"authorityName="Ng & Anker"authorityYear="2024"box="[151,259,1758,1785]"class="Malacostraca"family="Pilumnidae"genus="Camptoplax"kingdom="Animalia"order="Decapoda"pageId="6"pageNumber="125"phylum="Arthropoda"rank="species"species="ahmar"status="sp. nov.">
<bibRefCitationid="69314B6A9B0BFF86CAC0F8D71581F887"author="Davie, P. J. F."box="[766,900,1794,1820]"pageId="6"pageNumber="125"pagination="67 - 73"refId="ref3545"refString="Davie, P. J. F. (1993) Rediscovery of Camptoplax coppingeri Miers, 1884, and its placement in the Pilumnidae (Crustacea: Brachyura). Raffles Bulletin of Zoology, 41 (1), 67 - 73."type="journal article"year="1993">Davie 1993</bibRefCitation>
: fig. 1A); the front of
<taxonomicNameid="CAA04D189B0BFF86CC47F8D612E6F887"authorityName="Ng & Anker"authorityYear="2024"box="[1145,1251,1794,1821]"class="Malacostraca"family="Pilumnidae"genus="Camptoplax"kingdom="Animalia"order="Decapoda"pageId="6"pageNumber="125"phylum="Arthropoda"rank="species"species="ahmar"status="sp. nov.">
<bibRefCitationid="69314B6A9B0BFF86C9BFF89F1400F8FF"author="Miers, E. J."box="[385,517,1866,1892]"pageId="6"pageNumber="125"pagination="18 - 32"refId="ref3716"refString="Miers, E. J. (1884) Crustacea. In: Report on the zoological collections made in the Indo-Pacific Ocean during the voyage of H. M. S. Alert 1881 - 1882. Part I. The collections from Melanesia. British Museum (Natural History), London, pp. 178 - 322, pls. 18 - 32."type="book chapter"year="1884">Miers 1884</bibRefCitation>
: pl. 24A;
<bibRefCitationid="69314B6A9B0BFF86CA4CF89F14FDF8FF"author="Davie, P. J. F."box="[626,760,1866,1892]"pageId="6"pageNumber="125"pagination="67 - 73"refId="ref3545"refString="Davie, P. J. F. (1993) Rediscovery of Camptoplax coppingeri Miers, 1884, and its placement in the Pilumnidae (Crustacea: Brachyura). Raffles Bulletin of Zoology, 41 (1), 67 - 73."type="journal article"year="1993">Davie 1993</bibRefCitation>
: fig. 2); the third maxilliped ischium of
<taxonomicNameid="CAA04D189B0BFF86CC86F89E1327F8FF"authorityName="Ng & Anker"authorityYear="2024"box="[1208,1314,1866,1893]"class="Malacostraca"family="Pilumnidae"genus="Camptoplax"kingdom="Animalia"order="Decapoda"pageId="6"pageNumber="125"phylum="Arthropoda"rank="species"species="ahmar"status="sp. nov.">
<bibRefCitationid="69314B6A9B0BFF86CCDBF8BB136EF813"author="Davie, P. J. F."box="[1253,1387,1902,1928]"pageId="6"pageNumber="125"pagination="67 - 73"refId="ref3545"refString="Davie, P. J. F. (1993) Rediscovery of Camptoplax coppingeri Miers, 1884, and its placement in the Pilumnidae (Crustacea: Brachyura). Raffles Bulletin of Zoology, 41 (1), 67 - 73."type="journal article"year="1993">Davie 1993</bibRefCitation>
: fig. 1B); the chelae of
<taxonomicNameid="CAA04D189B0BFF86C95CF84617CEF837"authorityName="Ng & Anker"authorityYear="2024"box="[354,459,1938,1965]"class="Malacostraca"family="Pilumnidae"genus="Camptoplax"kingdom="Animalia"order="Decapoda"pageId="6"pageNumber="125"phylum="Arthropoda"rank="species"species="ahmar"status="sp. nov.">
<figureCitationid="959B2A1E9B0BFF86CB5FF84715BDF837"box="[865,952,1938,1964]"captionStart="FIGURE 4"captionStartId="5.[151,250,1097,1121]"captionTargetBox="[151,1435,181,1073]"captionTargetId="figure-17@5.[151,1435,181,1073]"captionTargetPageId="5"captionText="FIGURE 4. Camptoplax ahmar sp. nov., holotype, male (9.7 × 8.0 mm) from Thuwal, Saudi Arabia, FLMNH UF 72875; A, right and left chelae, outer view; B, right cheliped (partially denuded), dorsal view; C, right P4 (partially denuded), dorsal view; D, right P5 (partially denuded), dorsal view."figureDoi="http://doi.org/10.5281/zenodo.13331106"httpUri="https://zenodo.org/record/13331106/files/figure.png"pageId="6"pageNumber="125">Fig. 4A</figureCitation>
<bibRefCitationid="69314B6A9B0BFF86C887F863173BF84B"author="Davie, P. J. F."box="[185,318,1974,2000]"pageId="6"pageNumber="125"pagination="67 - 73"refId="ref3545"refString="Davie, P. J. F. (1993) Rediscovery of Camptoplax coppingeri Miers, 1884, and its placement in the Pilumnidae (Crustacea: Brachyura). Raffles Bulletin of Zoology, 41 (1), 67 - 73."type="journal article"year="1993">Davie 1993</bibRefCitation>
: fig. 1E); the P4 and P5 meri are slightly longer (length to width ratio 2.98 and 2.94, respectively;
<figureCitationid="959B2A1E9B0BFF86CD4EF86316DFF86F"captionStart="FIGURE 4"captionStartId="5.[151,250,1097,1121]"captionTargetBox="[151,1435,181,1073]"captionTargetId="figure-17@5.[151,1435,181,1073]"captionTargetPageId="5"captionText="FIGURE 4. Camptoplax ahmar sp. nov., holotype, male (9.7 × 8.0 mm) from Thuwal, Saudi Arabia, FLMNH UF 72875; A, right and left chelae, outer view; B, right cheliped (partially denuded), dorsal view; C, right P4 (partially denuded), dorsal view; D, right P5 (partially denuded), dorsal view."figureDoi="http://doi.org/10.5281/zenodo.13331106"httpUri="https://zenodo.org/record/13331106/files/figure.png"pageId="6"pageNumber="125">Fig. 4C, D</figureCitation>
) in the new species (versus slightly shorter, length to width ratio 2.93 and 2.67, respectively, in
<bibRefCitationid="69314B6A9B0AFF87C882FF421747FF2A"author="Davie, P. J. F."box="[188,322,151,177]"pageId="7"pageNumber="126"pagination="67 - 73"refId="ref3545"refString="Davie, P. J. F. (1993) Rediscovery of Camptoplax coppingeri Miers, 1884, and its placement in the Pilumnidae (Crustacea: Brachyura). Raffles Bulletin of Zoology, 41 (1), 67 - 73."type="journal article"year="1993">Davie 1993</bibRefCitation>
: figs. 1C, D, 2); the P4 propodus and dactylus of
<taxonomicNameid="CAA04D189B0AFF87CB4CFF4215D8FF2A"authorityName="Ng & Anker"authorityYear="2024"box="[882,989,151,177]"class="Malacostraca"family="Pilumnidae"genus="Camptoplax"kingdom="Animalia"order="Decapoda"pageId="7"pageNumber="126"phylum="Arthropoda"rank="species"species="ahmar"status="sp. nov.">
are longer (propodus length to width ratio 2.63, length of dactylus 1.07 times propodus length;
<figureCitationid="959B2A1E9B0AFF87CB5DFF6E15BDFF4E"box="[867,952,187,213]"captionStart="FIGURE 4"captionStartId="5.[151,250,1097,1121]"captionTargetBox="[151,1435,181,1073]"captionTargetId="figure-17@5.[151,1435,181,1073]"captionTargetPageId="5"captionText="FIGURE 4. Camptoplax ahmar sp. nov., holotype, male (9.7 × 8.0 mm) from Thuwal, Saudi Arabia, FLMNH UF 72875; A, right and left chelae, outer view; B, right cheliped (partially denuded), dorsal view; C, right P4 (partially denuded), dorsal view; D, right P5 (partially denuded), dorsal view."figureDoi="http://doi.org/10.5281/zenodo.13331106"httpUri="https://zenodo.org/record/13331106/files/figure.png"pageId="7"pageNumber="126">Fig. 4C</figureCitation>
) (versus distinctly shorter, propodus length to width ratio 2.41, length of dactylus 0.92 times propodus length, in
<bibRefCitationid="69314B6A9B0AFF87CC67FF0A12D8FF62"author="Davie, P. J. F."box="[1113,1245,223,249]"pageId="7"pageNumber="126"pagination="67 - 73"refId="ref3545"refString="Davie, P. J. F. (1993) Rediscovery of Camptoplax coppingeri Miers, 1884, and its placement in the Pilumnidae (Crustacea: Brachyura). Raffles Bulletin of Zoology, 41 (1), 67 - 73."type="journal article"year="1993">Davie 1993</bibRefCitation>
: fig. 1D); and the distal half of the G1 of
<taxonomicNameid="CAA04D189B0AFF87C9A3FED61402FE86"authorityName="Ng & Anker"authorityYear="2024"box="[413,519,259,285]"class="Malacostraca"family="Pilumnidae"genus="Camptoplax"kingdom="Animalia"order="Decapoda"pageId="7"pageNumber="126"phylum="Arthropoda"rank="species"species="ahmar"status="sp. nov.">
<figureCitationid="959B2A1E9B0AFF87CC22FED61293FE86"box="[1052,1174,258,285]"captionStart="FIGURE 5"captionStartId="6.[151,250,1328,1352]"captionTargetBox="[158,1428,496,1298]"captionTargetId="figure-148@6.[151,1435,489,1305]"captionTargetPageId="6"captionText="FIGURE 5. Camptoplax ahmar sp. nov., holotype, male (9.7 × 8.0 mm) from Thuwal, Saudi Arabia, FLMNH UF 72875; A, pleon; B, left G1, ventral view; C, distal part of left G1, ventral view; D, distal part of left G1, dorsal view; E, left G2, ventral view. Scales: A = 1.0 mm; B, E = 0.5 mm; C, D = 0.2 mm."figureDoi="http://doi.org/10.5281/zenodo.13331109"httpUri="https://zenodo.org/record/13331109/files/figure.png"pageId="7"pageNumber="126">Fig. 5B–D</figureCitation>
), with the distal curved part also being proportionately longer (
<figureCitationid="959B2A1E9B0AFF87CA71FEF214C2FEDA"box="[591,711,294,321]"captionStart="FIGURE 5"captionStartId="6.[151,250,1328,1352]"captionTargetBox="[158,1428,496,1298]"captionTargetId="figure-148@6.[151,1435,489,1305]"captionTargetPageId="6"captionText="FIGURE 5. Camptoplax ahmar sp. nov., holotype, male (9.7 × 8.0 mm) from Thuwal, Saudi Arabia, FLMNH UF 72875; A, pleon; B, left G1, ventral view; C, distal part of left G1, ventral view; D, distal part of left G1, dorsal view; E, left G2, ventral view. Scales: A = 1.0 mm; B, E = 0.5 mm; C, D = 0.2 mm."figureDoi="http://doi.org/10.5281/zenodo.13331109"httpUri="https://zenodo.org/record/13331109/files/figure.png"pageId="7"pageNumber="126">Fig. 5B–D</figureCitation>
) (versus the distal half of the G1 being shorter and more slender and with a shorter distal curved part, in its congener; cf.
<bibRefCitationid="69314B6A9B0AFF87CB31FE9E1590FEFE"author="Davie, P. J. F."box="[783,917,331,357]"pageId="7"pageNumber="126"pagination="67 - 73"refId="ref3545"refString="Davie, P. J. F. (1993) Rediscovery of Camptoplax coppingeri Miers, 1884, and its placement in the Pilumnidae (Crustacea: Brachyura). Raffles Bulletin of Zoology, 41 (1), 67 - 73."type="journal article"year="1993">Davie 1993</bibRefCitation>
<taxonomicNameid="CAA04D189B0AFF87C981FEBA142FFE12"authorityName="Ng & Anker"authorityYear="2024"box="[447,554,367,393]"class="Malacostraca"family="Pilumnidae"genus="Camptoplax"kingdom="Animalia"order="Decapoda"pageId="7"pageNumber="126"phylum="Arthropoda"rank="species"species="ahmar"status="sp. nov.">
, and this seems to be independent of the angle it is viewed from. The discriminating characters of the P2–P5 are clearly discernible, although their validity need to be ascertained in the future with more specimens collected. Nevertheless, these differences do not seem to be age-related since all examined specimens are in the same size range.
<taxonomicNameid="CAA04D189B0AFF87C982FE2A1420FD82"authorityName="Ng & Anker"authorityYear="2024"box="[444,549,511,537]"class="Malacostraca"family="Pilumnidae"genus="Camptoplax"kingdom="Animalia"order="Decapoda"pageId="7"pageNumber="126"phylum="Arthropoda"rank="species"species="ahmar"status="sp. nov.">
(Miers 1994: 240), while the specimen from the Chesterfield Islands was collected on a sandy substrate in a lagoon with coral reef setting, at a depth of 13.0–
<bibRefCitationid="69314B6A9B0AFF87CB64FD5A120BFD32"author="Davie, P. J. F."box="[858,1038,655,681]"pageId="7"pageNumber="126"pagination="67 - 73"refId="ref3545"refString="Davie, P. J. F. (1993) Rediscovery of Camptoplax coppingeri Miers, 1884, and its placement in the Pilumnidae (Crustacea: Brachyura). Raffles Bulletin of Zoology, 41 (1), 67 - 73."type="journal article"year="1993">Davie 1993: 71</bibRefCitation>
). However, the northern Australian specimen was collected in deeper water, at a depth range of
<bibRefCitationid="69314B6A9B0AFF87CB96FD66127EFD56"author="Takeda, M. & Ahyong, S. T. & Ohtsuchi, N."box="[936,1147,691,717]"pageId="7"pageNumber="126"pagination="35 - 83"refId="ref3964"refString="Takeda, M., Ahyong, S. T., Ohtsuchi, N. & Komatsu. H. (2022) Crabs (Crustacea, Decapoda) from the Seas of East and Southeast Asia collected by the RV Hakuho Maru (KH- 72 - 1 Cruise). 3. Sahul Shelf. Bulletin of the National Museum of Natural Science, (A) 48 (2), 35 - 83."type="journal article"year="2022">
