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<document id="D9E65E830E6AECF0D04DA7376FE8B913" ID-CLB-Dataset="28678" ID-DOI="http://dx.doi.org/10.3897/zookeys.810.29253" ID-GBIF-Dataset="c800b48c-aff8-46f5-a716-84e0cf16bd4e" ID-PMC="PMC6308222" ID-Pensoft-Pub="1313-2970-810-45" ID-PubMed="30613173" ID-ZooBank="5361B3677FA8495D81B27151B77D2CB4" ModsDocAuthor="" ModsDocDate="2018" ModsDocID="1313-2970-810-45" ModsDocOrigin="ZooKeys 810" ModsDocTitle="Onychocamptus Daday, 1903 from Thailand, with descriptions of two new species and two new records (Crustacea, Copepoda, Harpacticoida, Laophontidae)" checkinTime="1545315434524" checkinUser="pensoft" docAuthor="Boonyanusith, Chaichat, Saetang, Thanida, Wongkamheng, Koraon &amp; Supiyanit Maiphae," docDate="2018" docId="191C0731CBB91FA58F7C0DA134AB33BC" docLanguage="en" docName="ZooKeys 810: 45-89" docOrigin="ZooKeys 810" docSource="http://dx.doi.org/10.3897/zookeys.810.29253" docTitle="Onychocamptus satunensis Boonyanusith, Saetang, Wongkamheng &amp; Maiphae, 2018, sp. n." docType="treatment" docUuid="F38757B6-A85E-4F7C-B4AC-520821E6C650" docUuidSource="ZooBank" docVersion="7" lastPageNumber="52" masterDocId="FFA82031FFF8FFD4FFFA2124FFBAFFD4" masterDocTitle="Onychocamptus Daday, 1903 from Thailand, with descriptions of two new species and two new records (Crustacea, Copepoda, Harpacticoida, Laophontidae)" masterLastPageNumber="89" masterPageNumber="45" pageNumber="47" updateTime="1701372713019" updateUser="ExternalLinkService">
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<mods:title id="2A3748080AF58350261D9049677D7AE6">Onychocamptus Daday, 1903 from Thailand, with descriptions of two new species and two new records (Crustacea, Copepoda, Harpacticoida, Laophontidae)</mods:title>
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<mods:namePart id="843387C0F1FA2F2C3670130E9EBF34CE">Boonyanusith, Chaichat</mods:namePart>
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<mods:namePart id="CB1E7979A9E5F2C078BF67038F657A34">Saetang, Thanida</mods:namePart>
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<mods:namePart id="B5F2A0085450B79C5F447EAF17E5B29C">Wongkamheng, Koraon</mods:namePart>
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<mods:namePart id="C4BD7C2FDF427E88F90B799B20437691">Supiyanit Maiphae,</mods:namePart>
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<treatment id="191C0731CBB91FA58F7C0DA134AB33BC" ID-GBIF-Taxon="154127010" LSID="urn:lsid:zoobank.org:act:F38757B6-A85E-4F7C-B4AC-520821E6C650" httpUri="http://treatment.plazi.org/id/191C0731CBB91FA58F7C0DA134AB33BC" lastPageId="7" lastPageNumber="52" pageId="2" pageNumber="47">
<subSubSection id="3B73A993961B2DB18AF781B5E6C40A96" pageId="2" pageNumber="47" type="nomenclature">
<paragraph id="9B161FF9E115EBC8B2EDD3D604AD7362" pageId="2" pageNumber="47">
<taxonomicName id="6B784F529F07E71370BC1A3EE45B3255" ID-CoL="49R34" LSID="http://zoobank.org/F38757B6-A85E-4F7C-B4AC-520821E6C650" class="Copepoda" family="Laophontidae" genus="Onychocamptus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Onychocamptus satunensis" order="Harpacticoida" pageId="2" pageNumber="47" phylum="Arthropoda" rank="species" species="satunensis">Onychocamptus satunensis</taxonomicName>
<taxonomicNameLabel id="990FF37BC8FF9284B1E987161FDC0C5E" pageId="2" pageNumber="47">sp. n.</taxonomicNameLabel>
Figs 2, 3, 4, 5, 6, 7, 8, 23A
</paragraph>
</subSubSection>
<subSubSection id="A1599669400E6369DE5A7FDFA327168E" pageId="2" pageNumber="47" type="materials_examined">
<paragraph id="B87B991BAB9F355483BFC2A124160BEE" pageId="2" pageNumber="47">Material examined.</paragraph>
<paragraph id="7CD11A7210BB05634900381A42E41BD0" pageId="2" pageNumber="47">Holotype. Adult female, dissected and mounted onto one slide, collected from type locality on 30 July 2015 (PSUZC-PK2002-01). Allotype. One adult male, dissected and mounted onto one slide, (PSUZC-PK2002-02), all collected from type locality on 20 January 2016. Paratypes. One undissected adult ovigerous female paratype mounted onto one slide (PSUZC-PK2002-03), and one undissected adult male paratype, mounted onto one slide (PSUZC-PK2002-04), coll. C Boonyanusith and K Wongkamheng; type locality on 30 July 2015 and 20 January 2016, respectively.</paragraph>
</subSubSection>
<subSubSection id="38A871E456235833DDF5283A9D5DF445" pageId="2" pageNumber="47" type="materials_examined">
<paragraph id="1D1FF95D0DB2AA53969F0CF6643EA019" pageId="2" pageNumber="47">Additional material.</paragraph>
<paragraph id="2EF25C3C9AF8230D82D9F8A640451DA5" pageId="2" pageNumber="47">One adult ovigerous female and one adult male, both collected from type locality on 2 April 2015 and stored in 70% ethanol, deposited in the collection of the first author (CB).</paragraph>
</subSubSection>
<subSubSection id="4A49D85F6BFEC67E076D9D01DBF68B73" pageId="2" pageNumber="47" type="type locality">
<paragraph id="E2671E45394AA4073DB23FA9A70E07B7" pageId="2" pageNumber="47">Type locality.</paragraph>
<paragraph id="625FBD45820CBE0E9E8A2949A8B69F9A" pageId="2" pageNumber="47">
Prawattisart cave, Muang district, Satun Province, southern Thailand,
<geoCoordinate id="D1374F8A55D04A325E482068E0C206C6" direction="north" orientation="latitude" precision="1" value="6.7155056">6°42'55.82&quot;N</geoCoordinate>
,
<geoCoordinate id="DB142066AF0A9EF124F88FD76E1B5CEF" direction="east" orientation="longitude" precision="1" value="100.08866">100°05'19.17&quot;E</geoCoordinate>
. The cave is in an isolated, wedge-shaped, limestone hill. It is surrounded by irrigation canal and paddy fields, but there are no connections between water in and outside cave. Beyond entrance of the cave there is a long horizontal gallery, with approximately 5-10 m high and approximately 2-3 m wide. At some place there are two openings, which are large enough for entry, indicating a complex tunnel system. The collecting point is a part of a large water body inside the cave, fulfilled by approximately 10-50 cm depth of water. Water depth varies according to season, but it has never dried out. Water was turbid and flowed slowly. Water temperature was 25.5 °C, pH 7.8, conductivity 360
<normalizedToken id="515B13C67069A71332089F683D6494F4" originalValue="µS">µS</normalizedToken>
cm-1, dissolved oxygen 4.9 mgL-1.
</paragraph>
</subSubSection>
<subSubSection id="AFE6A3F3DAAF18271BADA0159D5F3455" pageId="2" pageNumber="47" type="etymology">
<paragraph id="020A1F7E56EFE8954F262DFE2926419E" pageId="2" pageNumber="47">Etymology.</paragraph>
<paragraph id="3D3B58D79533470811CB8CA3F84E28D1" pageId="2" pageNumber="47">
The specific name
<taxonomicName id="6D12056C76180DE9EE9766F71844BF64" lsidName="satunensis" pageId="2" pageNumber="47" rank="species" species="satunensis">satunensis</taxonomicName>
is derived from the name of Satun Province, where the species was collected. The name is a noun in the genitive singular, masculine.
</paragraph>
</subSubSection>
<subSubSection id="D3CCEF7C287C07123CFB834A1B724670" pageId="2" pageNumber="47" type="differential diagnosis">
<paragraph id="5F9E73A4EE7E47212805E614FAAB6DD5" pageId="2" pageNumber="47">Differential diagnosis.</paragraph>
<paragraph id="B0805B253D023648CDDDE53565FF4B24" pageId="2" pageNumber="47">
<taxonomicName id="0D75F97C4877C331F0426DC07FE883DD" family="Laophontidae" lsidName="" pageId="2" pageNumber="47" rank="family">Laophontidae</taxonomicName>
. Body gradually tapering posteriorly. Cephalothorax with internal sausage-like structure, and internal rounded structures. Posterior margin of cephalothorax and body somites (except penultimate and anal somite) with sensillum-bearing tubercles. Second and third urosomite partly fused ventrally in female, representing genital double-somite. Caudal rami approximately 2.5 times as long as wide, with one transverse inner row of spinules near insertion of dorsal seta. Caudal seta IV and V fused. Allobasis of antenna without abexopodal seta. Endopodal lobe of P5 with three, and exopod with four pinnate setae. Male P3 enp-2 with apophysis on outer distal corner, reaching tip of enp-3. Exopod of male P5 with three setae, outer seta as long as supporting segment. Male P6 reduced, with outer seta and inner bipinnate seta apically; inner seta approximately twice as long as outer one.
</paragraph>
</subSubSection>
<subSubSection id="3E80255C55C40CEA7A0FC332D09BDA58" lastPageId="5" lastPageNumber="50" pageId="2" pageNumber="47" type="description">
<paragraph id="EFCAC51AB96EDE6F292F2DDCAD1B1279" pageId="2" pageNumber="47">Description of adult female.</paragraph>
<paragraph id="36A512A0438A4682C394DD5188F158B5" pageId="2" pageNumber="47">
Body (Fig. 2A). Total body length, measured from tip of rostrum to posterior margin of caudal rami, 401-445
<normalizedToken id="338DD86E405799C258F95E371055A3E7" originalValue="µm">µm</normalizedToken>
(mean 419
<normalizedToken id="A5AC827DB941A19E16F196249A690CDA" originalValue="µm">µm</normalizedToken>
, n = 3; 445
<normalizedToken id="192E421728934A1F1B7ACC4FC547CB97" originalValue="µm">µm</normalizedToken>
in holotype); preserved specimen colourless. Body covered with setules (Fig. 8E, F), cylindrical; gradually tapering posteriorly, with maximum width at posterior part of cephalothorax. Prosome approximately 1.3 times as long as urosome (including caudal rami) (Fig. 2A). Rostrum small, completely fused to cephalothorax. Cephalothorax as long as wide, approximately 0.5 times the length of prosome, just under integument with anterior internal structure comprising three parts; each of which sausage-like, and with internal rounded structures near distal margin (Figs 2A, B, 8A, B). Cephalothorax and all free thoracic somites with sensillum-bearing tubercles along posterior margin (Fig. 2A, B). Second and third urosomite fused ventrally (Fig. 2D), distinct dorsally and laterally (Fig. 2
<normalizedToken id="2F4E7F2C3444BFD9CC3F26281BAB34F1" originalValue="AC">A-C</normalizedToken>
), original division between sixth thoracic somite and first abdominal somite, with dorsal sensillum-bearing tubercles (Fig. 2C). Genital field ribbon-shaped, with seta representing P6 at outer distal corner (Fig. 2D). The remnant of first abdominal somite (posterior half of genital double-somite) with lateral sensillum-bearing tubercles (Fig. 2C, D). Posterior margin of genital double-somite and fourth urosomites with outer sensillum-bearing tubercles; posterior half of genital double-somite and fourth urosomite with posterior setules dorsally (Fig. 2C) and small spinules ventrally (Fig. 2D) between sensillum-bearing tubercles. Penultimate urosomite with posterior setules dorsally and laterally, with one posterior row of spinules ventrally. Anal somite as long as wide, with arch row of long spinules posterior to anal operculum (Figs 2A, C, 3A, 8D), with ventrolateral row of minute spinules near insertion of caudal rami (Fig. 2D). Anal operculum poorly developed, with minute spinules along posterior margin (Figs 2C, 3A, 8D).
</paragraph>
<caption id="20845E3BBD1D9353B7185BD6E15595CD" pageId="2" pageNumber="47">
<paragraph id="2F21750C649B66E48734B757AD506EE5" pageId="2" pageNumber="47">
Figure 2.
<taxonomicName id="86563F925693225F37C59959B6D816E6" class="Copepoda" family="Laophontidae" genus="Onychocamptus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Onychocamptus satunensis" order="Harpacticoida" pageId="2" pageNumber="47" phylum="Arthropoda" rank="species" species="satunensis">Onychocamptus satunensis</taxonomicName>
sp. n., female holotype. A habitus, dorsal view B habitus, lateral view C urosome, dorsal view D urosome, ventral view. Scale bar: 0.1 mm (A, B), 0.05 mm (C, D).
</paragraph>
</caption>
<paragraph id="C451185C779716C27A71C2E3AFA75C1F" pageId="2" pageNumber="47">Caudal rami (Figs 2C, D, 3A). Slightly convergent, 2.5 times as long as wide, with one transverse row of inner spinules near insertion of caudal seta (VII) (Figs 2C, 3A). Anterolateral accessory seta (I) minute, close to anterolateral seta (II), both subapical. Posterolateral seta (III) inserted on minute pedestal. Outer terminal seta (IV) slender, fused at base with inner terminal seta (V), the latter longest, without fracture plane, approximately 0.6 times as long as body length. Inner accessory seta (VI) slender. Dorsal seta (VII) tri-articulate, inserted at quarter of rami. Length ratio of caudal setae to ramus length, from seta I to seta VII of the holotype: 0.4: 0.8: 1.3: 0.7: 9.7: 0.7: 1.1.</paragraph>
<paragraph id="8666573F00F8401A2FDC38EF706CC2D6" pageId="2" pageNumber="47">The ovigerous female bears one oval egg sac with eight eggs, located ventrally between pair of fifth legs.</paragraph>
<paragraph id="C0F53D251FF2D87CCBF5C1F6652ACDBC" pageId="2" pageNumber="47">Antennule (Fig. 3B, C). Short, 5-segmented. First segment with medial and distal rows of spinules. Armature formula: I-[1], II-[8], III-[7+(1+aesthetasc)], IV-[1], V-[9+acrothek]. Aesthetasc on third segment robust, fused basally to one seta. Apical acrothek on fifth segment slender, consisting of one aesthetasc fused basally to two slender smooth seta.</paragraph>
<caption id="2B887A7094A7728D2591B27C3E75C3A6" pageId="2" pageNumber="47">
<paragraph id="6BA772D4DF8D84AA2FB6FA7CFB62DE04" pageId="2" pageNumber="47">
Figure 3.
<taxonomicName id="2659788227B39AE21BF4CDF8D44614E0" class="Copepoda" family="Laophontidae" genus="Onychocamptus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Onychocamptus satunensis" order="Harpacticoida" pageId="2" pageNumber="47" phylum="Arthropoda" rank="species" species="satunensis">Onychocamptus satunensis</taxonomicName>
sp. n., female holotype. A anal somite, dorsal view B antennule C ultimate segment of antennule D antenna E mandible. Scale bars: 0.05 mm.
</paragraph>
</caption>
<paragraph id="4AC8D51952CFB27179276E4C126A572A" pageId="2" pageNumber="47">Antenna (Fig. 3D). Comprising coxa, allobasis, and 1-segmented endopod and exopod. Coxa without ornamentation. Allobasis with one row of inner spinules, with 1-segmented exopod; the latter with two apical and two lateral bipinnate setae. Free endopodal segment with one strong, sharp spine, and one seta at distal third of segment; the former accompanied by several strong, short spinules; distal end with six elements: one minute seta, one slender, bipinnate seta, two geniculate setae, and two strong, smooth spines.</paragraph>
<paragraph id="6DE77EA9FDA9FE7CF00E0121134D0B02" pageId="2" pageNumber="47">Mandible (Fig. 3E). Gnathobase with strong, chitinised teeth and lateral pinnate seta. Mandibular palp short, 1-segmented, with five slender setae sub-equal in length.</paragraph>
<paragraph id="487E71F201F755EE632974B526291AB7" pageId="2" pageNumber="47">Maxillule (Fig. 4A). Composed of robust precoxa, coxa, basis, endopod fused to basis, and 1-segmented free exopod. Precoxal arthrite with six strong apical spines and one slender lateral seta. Coxa with cylindrical endite bearing two smooth setae, one of which robust. Basis with cylindrical endite bearing three setae, one of which robust. Endopod incorporated to basis, with three setae. Exopod free, 1-segmented, with two sub-equal apical setae.</paragraph>
<caption id="AF8354DFEB8B88951C2237C182030667" pageId="2" pageNumber="47">
<paragraph id="5CA4FC2C9E716EDEA45D51426E11AC01" pageId="2" pageNumber="47">
Figure 4.
<taxonomicName id="2364832EFACF226DDEF1D9ACFE1B4DE4" class="Copepoda" family="Laophontidae" genus="Onychocamptus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Onychocamptus satunensis" order="Harpacticoida" pageId="2" pageNumber="47" phylum="Arthropoda" rank="species" species="satunensis">Onychocamptus satunensis</taxonomicName>
sp. n., female holotype. A maxillule B maxilla C maxilliped D P1. Scale bar: 0.05 mm.
</paragraph>
</caption>
<paragraph id="CEB4D0AB9784C8E93FA06054584EDE11" pageId="2" pageNumber="47">Maxilla (Fig. 4B). Composed of syncoxa, allobasis, and 1-segmented endopod. Syncoxa with two endites; proximal endite with three apical pinnate setae, distal endite with two pinnate and one slender apical seta, outer margin with spinules. Allobasis with apical drawn out into claw, with one anterior and one posterior seta. Endopod 1-segmented, with two smooth apical setae.</paragraph>
<paragraph id="F8FFECF99D676D3CEF6774B3AE471C18" pageId="2" pageNumber="47">Maxilliped (Fig. 4C). Subchelate, 3-segmented, comprising syncoxa, basis, and endopod. Syncoxa with one pinnate seta at inner distal corner. Basis with two transverse rows of outer spinules, one of which near base of endopod. Endopod drawn out into strong claw, with one minute seta near its base.</paragraph>
<paragraph id="BC7AD6D325EC8ED245AAC2CA223834E4" pageId="2" pageNumber="47">P1 (Fig. 4D). Coxa with longitudinal row of outer setules. Basis with one outer bipinnate spine and one inner spine near insertion of endopod, with longitudinal row of anterior spinules medially, with long setules along inner margin. Both rami 2-segmented. Exopod reaching proximal third of enp-1; exp-1 with one bipinnate outer spine, with one row of outer spinules; exp-2 with three outer spines, two apical geniculate setae, with outer spinules and inner setules. Enp-1 approximately seven times as long as wide, with outer spinules and inner setules; enp-2 with one median strong outwardly curved claw-like smooth spine and one slender inner seta, with few outer spinules.</paragraph>
<paragraph id="66D8E71FC52CDB57F0BB4B7D2CA86510" pageId="2" pageNumber="47">P2 (Fig. 5A, B). Coxa with oblique row of spinules on anterior surface near outer margin, with row of spinules at distal outer corner. Basis with outer spine. Rami with 3-segmented exopod and 2-segmented endopod; endopod reaching tip of exp-2. Exp-1 with one outer bipinnate spine; exp-2 with one outer bipinnate spine and one inner plumose seta; exp-3 with three outer bipinnate spines, two apical elements (of which outer one spiniform seta with outer spinules and inner setules, inner element one plumose seta), and one inner plumose seta. All segments of exopod with row of outer spinules and inner setules. Enp-1 without armature, enp-2 with two apical and two inner plumose setae. All segments of endopod with row of outer spinules and long inner setules.</paragraph>
<caption id="9E3E66134C5AC2FC1F3089BC0502E73E" pageId="2" pageNumber="47">
<paragraph id="FA04BFA16B46F7AFD17CFC626F9A7557" pageId="2" pageNumber="47">
Figure 5.
<taxonomicName id="8E6BE5EF001D67A709020C944C5BDBA2" class="Copepoda" family="Laophontidae" genus="Onychocamptus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Onychocamptus satunensis" order="Harpacticoida" pageId="2" pageNumber="47" phylum="Arthropoda" rank="species" species="satunensis">Onychocamptus satunensis</taxonomicName>
sp. n., female holotype. A P2 B right P2 endopod C P3. Scale bar: 0.05 mm.
</paragraph>
</caption>
<paragraph id="38172AA7330DD011F3BFDF3CE95885C6" pageId="2" pageNumber="47">P3 (Fig. 5C). Coxa, basis, and segmentation of rami as in P2. Outer element of basis one long seta. Endopod reaching tip of exp-2. Exp-1 with one outer bipinnate spine; exp-2 with one outer bipinnate spine and one inner plumose seta; exp-3 with three outer bipinnate spines, two apical elements (of which outer one spiniform seta with outer spinules and inner setules, inner element one plumose seta), and one inner plumose seta. Ornamentation of exopod as in P2. Enp-1 without armature; enp-2 with one outer bipinnate seta, two apical, and three inner plumose setae. Outer and inner margins of segments of endopod with setules.</paragraph>
<paragraph id="9ED8C568521C7032E527D3C904113D13" lastPageId="4" lastPageNumber="49" pageId="3" pageNumber="48">
<pageBreakToken id="B39AFB9A13E2FAD16381E4DB187D1F34" pageId="3" pageNumber="48" start="start">P</pageBreakToken>
4 (Fig. 6A). Coxa with row of outer long spinules. Basis with one slender outer seta. Rami with 3-segmented exopod and 2-segmented endopod; endopod reaching tip of exp-1. Exp-1 with one outer bipinnate spine; exp-2 with one outer bipinnate spine and one inner plumose seta; exp-3 with two outer bipinnate spines, two apical elements (of which outer one spiniform seta with outer spinules and inner setules,
<pageBreakToken id="C951B361284D5595396986505E5023B1" pageId="4" pageNumber="49" start="start">inner</pageBreakToken>
element one plumose seta), and one inner plumose seta. Ornamentation of exopod as in P2 and P3. Enp-1 without armature, with long inner subdistal spinules and smaller outer spinules; enp-2 with one outer bipinnate seta, one apical plumose seta, and one inner plumose seta.
</paragraph>
<caption id="B87B58BB8D6D7D6CD883475A877A5131" pageId="4" pageNumber="49">
<paragraph id="367B049DC4D1EFB1282E71874874F32F" pageId="4" pageNumber="49">
Figure 6.
<taxonomicName id="ECDEE721540EF3AB9EA2B95EDE50E682" class="Copepoda" family="Laophontidae" genus="Onychocamptus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Onychocamptus satunensis" order="Harpacticoida" pageId="4" pageNumber="49" phylum="Arthropoda" rank="species" species="satunensis">Onychocamptus satunensis</taxonomicName>
sp. n., female holotype. A P4 B right P5 C left P5 exopod D
<taxonomicName id="AC39B326FEC26C3010801195F2E5E7AA" class="Copepoda" family="Laophontidae" genus="Onychocamptus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Onychocamptus satunensis" order="Harpacticoida" pageId="4" pageNumber="49" phylum="Arthropoda" rank="species" species="satunensis">Onychocamptus satunensis</taxonomicName>
sp. n., male allotype. habitus, dorsal view E urosome, ventral view F left P5. Scale bars: 0.05 mm.
</paragraph>
</caption>
<paragraph id="A6BF2C30168EA27B152D852BEFE721FF" pageId="4" pageNumber="49">Armature formula of P1P4 as in Table 1.</paragraph>
<caption id="4BF6443C15EBE232F8B0E49AB8FD2AC8" ID-Table-UUID="4BF6443C15EBE232F8B0E49AB8FD2AC8" httpUri="http://table.plazi.org/id/4BF6443C15EBE232F8B0E49AB8FD2AC8" pageId="4" pageNumber="49">
<paragraph id="A263001D7556FDCF7219F99B704DCF2E" pageId="4" pageNumber="49">
Table 1. Armature formula of P1-P4 of
<taxonomicName id="7DBB22B52ECCA4B2B7E1C02EC3C32B8F" class="Copepoda" family="Laophontidae" genus="Onychocamptus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Onychocamptus satunensis" order="Harpacticoida" pageId="4" pageNumber="49" phylum="Arthropoda" rank="species" species="satunensis">Onychocamptus satunensis</taxonomicName>
sp. n. and
<taxonomicName id="CC3F591174AA024A2726E9D4CB672F20" class="Copepoda" family="Laophontidae" genus="Onychocamptus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Onychocamptus tratensis" order="Harpacticoida" pageId="4" pageNumber="49" phylum="Arthropoda" rank="species" species="tratensis">Onychocamptus tratensis</taxonomicName>
sp. n.
</paragraph>
</caption>
<paragraph id="41D34AA29FD64EC07C76A53390C1E463" pageId="4" pageNumber="49">
<table id="71E3D1BEC6A2AC041067C7F8D3FAFB81" pageId="4" pageNumber="49">
<tr id="B6F8B2E2263FEF84642E5C7C9ACA85E1" pageId="4" pageNumber="49">
<th id="50135D12242B85E6085176D3F2844788" colspan="1" pageId="4" pageNumber="49" rowspan="1">Swimming legs</th>
<th id="8AD073067E3164AAF350606B6DF6C6F3" colspan="1" pageId="4" pageNumber="49" rowspan="1">Basis</th>
<th id="527D436B39EB94189CD12597B62A0398" colspan="1" pageId="4" pageNumber="49" rowspan="1">Exopod</th>
<th id="4308E71F479EB251D101124CC45B798E" colspan="1" pageId="4" pageNumber="49" rowspan="1">Endopod</th>
</tr>
</table>
</paragraph>
<paragraph id="E3303632E8722855DE26FB07D725BF24" pageId="5" pageNumber="50">
<pageBreakToken id="16B037F757E2F76684A2CF475D76F148" pageId="5" pageNumber="50" start="start">P</pageBreakToken>
5 (Figs 6B, C, 23A). Baseoendopod and exopod separated, with setules as on figures. Baseoendopod with basal seta and three pinnate setae on endopodal lobe, with spinules at base of distalmost seta. Exopod with four pinnate setae; innermost one longest.
</paragraph>
<paragraph id="AD5AFB2BED5CDBBA2E6B02A0AC1F4BC5" pageId="5" pageNumber="50">P6 (Fig. 2D). Reduced to minute prominence at outer distal corner of genital field, with one short, slender seta.</paragraph>
</subSubSection>
<subSubSection id="342C032C2B1BC18232F5995C93308A54" lastPageId="7" lastPageNumber="52" pageId="5" pageNumber="50" type="description">
<paragraph id="6D54B74C6F2CC9422C90E5B427F2EF7E" pageId="5" pageNumber="50">Description of adult male.</paragraph>
<paragraph id="1429812B3BB15884A440429D58A80E59" pageId="5" pageNumber="50">
Body (Fig. 6D). Total body length, measured from tip of rostrum to posterior margin of caudal rami, 352410
<normalizedToken id="0F842E436E2A2BB501E4DD30CC9CD14F" originalValue="µm">µm</normalizedToken>
(mean 374
<normalizedToken id="3B37D0EE375D1F1D0FE25297DCB9D6DF" originalValue="µm">µm</normalizedToken>
, n = 3; 410
<normalizedToken id="08A192F6EA13F036F967C304DB1A39A0" originalValue="µm">µm</normalizedToken>
in allotype); preserved specimen colourless. Prosome approximately 1.3 times as long as urosome (Fig. 6D). Cephalothorax as long as wide, 0.5 times the length of prosome, internal sausage-like structure as in female, with two internal rounded structures. All free thoracic somites with sensillum-bearing tubercles along dorsal posterior margin, but fifth thoracic somite (first urosomite) with additional row of posterior setules dorsally (Fig. 6D). Second and third urosomite completely separated. Second urosomite with dorsal sensillum-bearing tubercles along posterior margin (Fig. 6D). Fourth urosomite without lateral protuberances, with lateral sensillum-bearing tubercles, with one posterior row of dorsal setules and ventral spinules. Ornamentation on next three urosomites as in female (Fig. 6E). Anal somite and anal operculum as in female.
</paragraph>
<paragraph id="D21587344B52F3D898FD59261EF4B411" pageId="5" pageNumber="50">Caudal rami as in female (Fig. 6D, E).</paragraph>
<paragraph id="897E3024E6E2DF2BA778BD6C65FD8E4C" pageId="5" pageNumber="50">Antennule (Fig. 7A). 8-segmented, geniculate, with three segment distal to geniculation. First segment with proximal and subdistal outer spinules. Armature formula I-[1], II-[9], III-[7], IV-[2], V-[9+(1+aesthetasc)], VI-[1], VII-[1], VIII-[7+acrothek)]. Aesthetasc on fifth segment robust, fused basally to one seta. One pinnate seta on fifth segment. Apical acrothek on eighth segment small, consisting of one aesthetasc fused basally to two slender smooth seta.</paragraph>
<caption id="5B93DCA7313BC174D741F023F93E6B5C" pageId="5" pageNumber="50">
<paragraph id="0E1B840B5E4AC8B1526F11B01115314A" pageId="5" pageNumber="50">
Figure 7.
<taxonomicName id="B63121050A550B388CB8D3DC51F9E8B3" class="Copepoda" family="Laophontidae" genus="Onychocamptus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Onychocamptus satunensis" order="Harpacticoida" pageId="5" pageNumber="50" phylum="Arthropoda" rank="species" species="satunensis">Onychocamptus satunensis</taxonomicName>
sp. n., male allotype. A antennule B right P3 C proximal inner seta on left P3 enp-3 D distal inner seta on left P3 enp-3 E P4. Scale bars: 0.05 mm.
</paragraph>
</caption>
<paragraph id="E8E3FA0DA247383AE51B143A7CDC77C9" pageId="5" pageNumber="50">Rostrum, antenna, mouthparts and P1, P2 (not shown) as in female.</paragraph>
<paragraph id="FDFBA3F9E92D2B13BEC1A5BC2164553C" pageId="5" pageNumber="50">P3 (Fig. 7B). General shape as in female but both rami 3-segmented. Endopod reaching tip of exp-2. Exp-3 with three outer bipinnate spines, two apical elements (of which outer one spiniform robust seta with outer spinules and inner setules, inner element one smooth spiniform seta), and one inner plumose seta. Enp-2 with inner seta and outer apophysis on outer distal corner reaching tip of enp-3, with long outer spinules and few inner setules; enp-3 with two inner and two apical plumose setae.</paragraph>
<paragraph id="809F469C2BC9FF7DB22EE2FF136383F9" pageId="6" pageNumber="51">
<pageBreakToken id="2EC707B0C238AA18F913CFE55D47DC8B" pageId="6" pageNumber="51" start="start">P</pageBreakToken>
4 (Fig. 7E). General shape as in female but exp-3 relatively shorter and with stronger elements. Exp-3 with two outer bipinnate spines, two apical elements (of which outer one spiniform robust seta with outer spinules and inner setules, inner element one spiniform seta), and one inner plumose seta.
</paragraph>
<paragraph id="EF980FF43971EA507D1039AB5FF2D54A" pageId="7" pageNumber="52">
<pageBreakToken id="D9C9CC8920222A532E6F71445B933FD6" pageId="7" pageNumber="52" start="start">Armature</pageBreakToken>
formula of P1-P4 as in Table 1.
</paragraph>
<paragraph id="CBED957210CC8155B74C793128379F6B" pageId="7" pageNumber="52">P5 (Fig. 6E, F). With outer basal seta arising from long setophore; without endopodal lobe. Exopod with three setae, outermost slender and slightly longer than segment, approximately 1/3 times as long as the middle seta.</paragraph>
<paragraph id="FBBC261FAE05152D9035B405730FF502" pageId="7" pageNumber="52">P6 (Fig. 6E). Reduced to one minute rectangular protuberance, with outer plumose seta and inner bipinnate seta; inner seta approximately twice as long as outer one and reaching posterior margin of next urosomite.</paragraph>
</subSubSection>
<subSubSection id="214D950F86015843BB3F606715641E4E" pageId="7" pageNumber="52" type="variability">
<paragraph id="2341B788123BE0D3AA8E6FB75A4B2486" pageId="7" pageNumber="52">Variability.</paragraph>
<paragraph id="68E61E5D485FD683174C844047FC1806" pageId="7" pageNumber="52">The right P2 enp-2 lacks the proximalmost inner seta (Fig. 5B), and one additional small inner seta on the P5 exopod was observed (Fig. 6B) in the holotype. The P3 enp-3 of the allotype possesses two inner setae. Also, on the right ramus the setae possess outer and inner setules (Fig. 7B), but those of the left ramus possess inner spinules (Fig. 7C, D).</paragraph>
<paragraph id="374C18CF7165334ECE1C240141ED55C5" pageId="7" pageNumber="52">
<taxonomicName id="BE4E6A7E3BE054C5B5FC6D089898539D" class="Copepoda" family="Laophontidae" genus="Onychocamptus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Onychocamptus satunensis" order="Harpacticoida" pageId="7" pageNumber="52" phylum="Arthropoda" rank="species" species="satunensis">Onychocamptus satunensis</taxonomicName>
sp. n. is the only species of
<taxonomicName id="0BE3F7BCD7D459D80E9960DDD019B2B6" class="Copepoda" family="Laophontidae" genus="Onychocamptus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Onychocamptus" order="Harpacticoida" pageId="7" pageNumber="52" phylum="Arthropoda" rank="genus">Onychocamptus</taxonomicName>
with internal sausagelike structure on cephalothorax (Figs 2A, B, 8
<normalizedToken id="4CC3EB3D6151BBFBA819183C1CDCB117" originalValue="AC">A-C</normalizedToken>
), differing from other members.
<taxonomicName id="23AFE582712CCB35F00C87CB1CEEBCF2" lsidName="O. satunensis" pageId="7" pageNumber="52" rank="species" species="satunensis">O. satunensis</taxonomicName>
sp. n. is most similar to
<taxonomicName id="91173F4AD31496A404DB34E70F08E72C" lsidName="O. tratensis" pageId="7" pageNumber="52" rank="species" species="tratensis">O. tratensis</taxonomicName>
sp. n., both species sharing the following remarkably characters: 1) absence of abexpodal seta on allobasis, 2) presence of 4 setae on exopod of antenna, 3) presence of 2 outer spines on P4 exp-3, 4) presence of 4 setae on exopod of P5 of the female, and 5) presence of 3 setae on exopod of P5 of the male. The southern Thai species (
<taxonomicName id="FB2D29E16275863012B480FA091F45C6" lsidName="O. satunensis" pageId="7" pageNumber="52" rank="species" species="satunensis">O. satunensis</taxonomicName>
sp. n.), however, can be distinguished from the eastern one (
<taxonomicName id="87507743CD8C09FA0E67F55485CA0DE5" lsidName="O. tratensis" pageId="7" pageNumber="52" rank="species" species="tratensis">O. tratensis</taxonomicName>
sp. n.) by the presence of internal sausagelike structure, the presence of internal rounded structures, and the relative length of outer seta on P3 enp-2. Comparative study between two Thai new species and their congeners is provided in Table 3.
</paragraph>
<caption id="F0DE1F53BB78AC7BE690437D29945A99" pageId="7" pageNumber="52">
<paragraph id="0DD278EC6224E6BD3BAE8D75E0C82378" pageId="7" pageNumber="52">
Figure 8.
<taxonomicName id="FBDDB0A1F5C3D4F4F50830E2C8F29F39" class="Copepoda" family="Laophontidae" genus="Onychocamptus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Onychocamptus satunensis" order="Harpacticoida" pageId="7" pageNumber="52" phylum="Arthropoda" rank="species" species="satunensis">Onychocamptus satunensis</taxonomicName>
sp. n., Digital photographs (A, B) and SEM photographs.
<normalizedToken id="6BCE9CDCF569C1FBF6EC634C480723AD" originalValue="AC">A-C</normalizedToken>
cephalothorax (dotted line on figure B indicates margin of internal structures) D anal somite and caudal rami E male urosome, lateral view, arrow indicates setules F tip of female antennule, arrow indicates setules. Scale bars: 0.1 mm (A, C), 0.05 mm (B, D), 0.005 mm (E), 0.02 mm (F).
</paragraph>
</caption>
<caption id="F6556D36292195164B83EA675D29C21A" pageId="7" pageNumber="52">
<paragraph id="AEEB2E3B0F00794769B9363C4F241F7D" pageId="7" pageNumber="52">
Table 3. Comparison of characters of female and male of genus
<taxonomicName id="F0D10650EC863956A222075B108D808C" class="Copepoda" family="Laophontidae" genus="Onychocamptus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Onychocamptus" order="Harpacticoida" pageId="7" pageNumber="52" phylum="Arthropoda" rank="genus">Onychocamptus</taxonomicName>
.
</paragraph>
</caption>
<paragraph id="19E3B7BBD972287C57D9075473EFA0D3" pageId="7" pageNumber="52">
<table id="62E9C3E55391ADF9534AF76F9ED5EBA6" pageId="7" pageNumber="52">
<tr id="983ED1ACD7944D75E3322C80D8C04EC1" pageId="7" pageNumber="52">
<th id="FA9BE22429DC94FE0220A4FE6FF7FF00" colspan="1" pageId="7" pageNumber="52" rowspan="1">
<taxonomicName id="F5FC07F038834DB696E13CD8C6E77B13" lsidName="O. anomalus" pageId="7" pageNumber="52" rank="species" species="anomalus">O. anomalus</taxonomicName>
</th>
<th id="4FFCC7697FA20E27B864ADCE2681FB3B" colspan="1" pageId="7" pageNumber="52" rowspan="1">
<taxonomicName id="6D25FA2FA0178D109C02D27FBC17A15A" lsidName="O. bengalensis" pageId="7" pageNumber="52" rank="species" species="bengalensis">O. bengalensis</taxonomicName>
</th>
<th id="3FAD729DFCC2709A3E452CA861964447" colspan="1" pageId="7" pageNumber="52" rowspan="1">
<taxonomicName id="59753CFCBAEEB747D060B8F3B75B8FF1" lsidName="O. besnardi" pageId="7" pageNumber="52" rank="species" species="besnardi">O. besnardi</taxonomicName>
</th>
<th id="34A5FEB07F43AA0B04CEEB00F25177CB" colspan="1" pageId="7" pageNumber="52" rowspan="1">
<taxonomicName id="A2C8CE371352B97BD344D4BDC9EB0CFF" lsidName="O. fratrisaustralis" pageId="7" pageNumber="52" rank="species" species="fratrisaustralis">O. fratrisaustralis</taxonomicName>
</th>
<th id="1C5AB70F0EA5A5BAE57FCD1521EF0585" colspan="1" pageId="7" pageNumber="52" rowspan="1">
<taxonomicName id="2E1D98031955CCD8DB063810B8A73390" lsidName="O. krusensterni" pageId="7" pageNumber="52" rank="species" species="krusensterni">O. krusensterni</taxonomicName>
</th>
<th id="49A1F5C3614C2EC949CD2A89E3FC812A" colspan="1" pageId="7" pageNumber="52" rowspan="1">
<taxonomicName id="2082022E00C7F8B235924FA10FC49646" lsidName="O. mohammed" pageId="7" pageNumber="52" rank="species" species="mohammed">O. mohammed</taxonomicName>
</th>
<th id="9B27814FCAC11980F4BF692B37D4A5C7" colspan="1" pageId="7" pageNumber="52" rowspan="1">
<taxonomicName id="BF8DED5301F7659605117BBC9FDCDD7E" lsidName="O. taifensis" pageId="7" pageNumber="52" rank="species" species="taifensis">O. taifensis</taxonomicName>
</th>
<th id="A675933863C06C914F9622F7AA74E390" colspan="1" pageId="7" pageNumber="52" rowspan="1">
<taxonomicName id="3072C0AF4E4FBA519995DE8DD54739E6" lsidName="O. vitiospinulosa" pageId="7" pageNumber="52" rank="species" species="vitiospinulosa">O. vitiospinulosa</taxonomicName>
</th>
<th id="E894F0467D2383445A8E604529A8911C" colspan="1" pageId="7" pageNumber="52" rowspan="1">
<taxonomicName id="96A573A749C8FBE508E368929AC94486" lsidName="O. satunensis" pageId="7" pageNumber="52" rank="species" species="satunensis">O. satunensis</taxonomicName>
sp. n.
</th>
<th id="3D3BBB79AE9B619EA2B1AF2F99851926" colspan="1" pageId="7" pageNumber="52" rowspan="1">
<taxonomicName id="5315BC06DA24A978E5506C52B89E2541" lsidName="O. tratensis" pageId="7" pageNumber="52" rank="species" species="tratensis">O. tratensis</taxonomicName>
sp. n.
</th>
</tr>
<tr id="1D93ECB1123CB37BDDBF212FDD36BDB0" pageId="7" pageNumber="52">
<td id="C3CDA28EFCA87A498CD5F947CD221168" colspan="1" pageId="7" pageNumber="52" rowspan="1">internal sausage-like structure, and internal rounded structures</td>
<td id="64FDC9ECDD0A0D3934AE4239E0CA18CB" colspan="1" pageId="7" pageNumber="52" rowspan="1">1 middle and 2 lateral rounded integumental window-like structures</td>
</tr>
<tr id="EECD55521CCC78282963079A7B60C7C2" pageId="7" pageNumber="52">
<td id="4D6BDFE87BC97A8CD5A5D114C6FC5F65" colspan="1" pageId="7" pageNumber="52" rowspan="1">D</td>
<td id="679594097DE32F980D2777E94427C9A8" colspan="1" pageId="7" pageNumber="52" rowspan="1">E</td>
</tr>
</table>
</paragraph>
</subSubSection>
<subSubSection id="789522EFA1CA44AD07789C08952079DE" pageId="7" pageNumber="52" type="distribution">
<paragraph id="2D3D3A7015F2FB2D0852C5B0D9CCAF08" pageId="7" pageNumber="52">Distribution.</paragraph>
<paragraph id="28CD25D2E0C77294FA5F80B0315F3505" pageId="7" pageNumber="52">This species is known from the type locality only.</paragraph>
</subSubSection>
</treatment>
</document>