<documentid="4A35D45F320A530B684B642BEF55EC11"ID-CLB-Dataset="54097"ID-DOI="10.11646/megataxa.4.1.1"ID-GBIF-Dataset="7c9bc39d-9910-46f1-9558-c0647b9cbbdb"ID-ISSN="2703-3090"ID-Zenodo-Dep="4591138"IM.materialsCitations_approvedBy="felipe"IM.metadata_approvedBy="felipe"IM.tables_approvedBy="jonas"IM.taxonomicNames_approvedBy="jonas"IM.treatments_approvedBy="felipe"checkinTime="1614033145335"checkinUser="plazi"docAuthor="Kim, Il-Hoi & Boxshall, Geoff A."docDate="2020"docId="03C487CBEEE93B8EFCEFFE55FC47FE74"docLanguage="en"docName="megataxa.4.1.1.pdf.imf"docOrigin="Megataxa 4 (1)"docSource="http://zoobank.org/3fdd970e-62f1-4f67-8cce-10870bdb3c01"docStyle="DocumentStyle:50B6B96D96A55C21793B52C23E95B310.5:Megataxa.2020-.journal_article"docStyleId="50B6B96D96A55C21793B52C23E95B310"docStyleName="Megataxa.2020-.journal_article"docStyleVersion="5"docTitle="Bysone brevicaudatus Kim & Boxshall 2020, sp. nov."docType="treatment"docVersion="12"lastPageNumber="444"masterDocId="FFFDFFB3EF513A35FFC5FFCEFFC5FFC1"masterDocTitle="Untold diversity: the astonishing species richness of the Notodelphyidae (Copepoda: Cyclopoida), a family of symbiotic copepods associated with ascidians (Tunicata)"masterLastPageNumber="6"masterPageNumber="1"pageNumber="441"updateTime="1738783121566"updateUser="jonas">
<mods:titleid="CECB908B10120F2B889AA5E3B1BC2140">Untold diversity: the astonishing species richness of the Notodelphyidae (Copepoda: Cyclopoida), a family of symbiotic copepods associated with ascidians (Tunicata)</mods:title>
<taxonomicNameid="4C6D4D5EEEE93B8DFCEFFE55FBF7FE74"ID-CoL="7ZG3Q"authority="Kim & Boxshall, 2020"authorityName="Kim & Boxshall"authorityYear="2020"box="[810,1074,410,437]"class="Copepoda"family="Notodelphyidae"genus="Bysone"higherTaxonomySource="GBIF"kingdom="Animalia"order="Cyclopoida"pageId="440"pageNumber="441"phylum="Arthropoda"rank="species"species="brevicaudatus"status="sp. nov.">
<figureCitationid="13562A58EEE93B8DFB1FFCFDFA92FC8C"box="[1242,1367,819,845]"captionStart="FIGURE 292"captionStartId="441.[136,245,1907,1933]"captionTargetBox="[246,1343,216,1845]"captionTargetId="figure-18@441.[197,1391,185,1870]"captionTargetPageId="441"captionText="FIGURE 292. Bysone brevicaudatus sp. nov., female. A, habitus, right; B, urosome, dorsal; C, right caudal ramus, dorsal; D, rostrum; E, antennule; F, antenna; G, labrum; H, mandible; I, maxillule. Scale bars: A, 0.2 mm; B, 0.1 mm; C–I, 0.05 mm."figureDoi="http://doi.org/10.5281/zenodo.4591879"httpUri="https://zenodo.org/record/4591879/files/figure.png"pageId="440"pageNumber="441">Fig. 292A</figureCitation>
) stout, curved ventrally. Prosome 1.40 mm long: dorsal cephalic shield clearly defined; first to fourth pedigerous somites discernible by constrictions; second and third pedigerous somites each with trace of tergite. Third and fourth pedigerous somites forming brood pouch. Free urosome (
<figureCitationid="13562A58EEE93B8DFCF7FC31FC69FBD8"box="[818,940,1023,1049]"captionStart="FIGURE 292"captionStartId="441.[136,245,1907,1933]"captionTargetBox="[246,1343,216,1845]"captionTargetId="figure-18@441.[197,1391,185,1870]"captionTargetPageId="441"captionText="FIGURE 292. Bysone brevicaudatus sp. nov., female. A, habitus, right; B, urosome, dorsal; C, right caudal ramus, dorsal; D, rostrum; E, antennule; F, antenna; G, labrum; H, mandible; I, maxillule. Scale bars: A, 0.2 mm; B, 0.1 mm; C–I, 0.05 mm."figureDoi="http://doi.org/10.5281/zenodo.4591879"httpUri="https://zenodo.org/record/4591879/files/figure.png"pageId="440"pageNumber="441">Fig. 292B</figureCitation>
) 5-segmented: genital somite well defined ventrally from preceding somite, but dorsally confluent. Anal somite about 1.5 times longer than preceding abdominal somite. Caudalramus (
<figureCitationid="13562A58EEE93B8DFB14FBABFA88FBBE"box="[1233,1357,1125,1151]"captionStart="FIGURE 292"captionStartId="441.[136,245,1907,1933]"captionTargetBox="[246,1343,216,1845]"captionTargetId="figure-18@441.[197,1391,185,1870]"captionTargetPageId="441"captionText="FIGURE 292. Bysone brevicaudatus sp. nov., female. A, habitus, right; B, urosome, dorsal; C, right caudal ramus, dorsal; D, rostrum; E, antennule; F, antenna; G, labrum; H, mandible; I, maxillule. Scale bars: A, 0.2 mm; B, 0.1 mm; C–I, 0.05 mm."figureDoi="http://doi.org/10.5281/zenodo.4591879"httpUri="https://zenodo.org/record/4591879/files/figure.png"pageId="440"pageNumber="441">Fig. 292C</figureCitation>
) nearly rectangular, about 2.7 times longerthan wide (148×54 μm) and aslongas anal somite: armedwith 6 smallsetae (outer proximal, ventral, and 4 distal); all setae small, less than half of width of ramus at base; outer proximal and ventral setae located at 38 and 62% of ramus length, respectively.
<figureCitationid="13562A58EEE93B8DFC1BFA9DFBA7FAAC"box="[990,1122,1363,1389]"captionStart="FIGURE 292"captionStartId="441.[136,245,1907,1933]"captionTargetBox="[246,1343,216,1845]"captionTargetId="figure-18@441.[197,1391,185,1870]"captionTargetPageId="441"captionText="FIGURE 292. Bysone brevicaudatus sp. nov., female. A, habitus, right; B, urosome, dorsal; C, right caudal ramus, dorsal; D, rostrum; E, antennule; F, antenna; G, labrum; H, mandible; I, maxillule. Scale bars: A, 0.2 mm; B, 0.1 mm; C–I, 0.05 mm."figureDoi="http://doi.org/10.5281/zenodo.4591879"httpUri="https://zenodo.org/record/4591879/files/figure.png"pageId="440"pageNumber="441">Fig. 292D</figureCitation>
) 95×118 μm, indistinctly articulated at base tapering distally towards rounded apex. Antennule (
<figureCitationid="13562A58EEE93B8DFC37FA59FBA0FA73"box="[1010,1125,1431,1458]"captionStart="FIGURE 292"captionStartId="441.[136,245,1907,1933]"captionTargetBox="[246,1343,216,1845]"captionTargetId="figure-18@441.[197,1391,185,1870]"captionTargetPageId="441"captionText="FIGURE 292. Bysone brevicaudatus sp. nov., female. A, habitus, right; B, urosome, dorsal; C, right caudal ramus, dorsal; D, rostrum; E, antennule; F, antenna; G, labrum; H, mandible; I, maxillule. Scale bars: A, 0.2 mm; B, 0.1 mm; C–I, 0.05 mm."figureDoi="http://doi.org/10.5281/zenodo.4591879"httpUri="https://zenodo.org/record/4591879/files/figure.png"pageId="440"pageNumber="441">Fig. 292E</figureCitation>
) 270 μmlong, 6-segmented; armatureformula 3, 14, 7+aesthetasc, 3+aesthetasc, 2+aesthetasc, and 9+2 aesthetascs; setae naked and short; distal seta on fourth and fifth segment annulated at base. Antenna (
<figureCitationid="13562A58EEE93B8DFC5FF9D1FBC8F9FB"box="[922,1037,1567,1594]"captionStart="FIGURE 292"captionStartId="441.[136,245,1907,1933]"captionTargetBox="[246,1343,216,1845]"captionTargetId="figure-18@441.[197,1391,185,1870]"captionTargetPageId="441"captionText="FIGURE 292. Bysone brevicaudatus sp. nov., female. A, habitus, right; B, urosome, dorsal; C, right caudal ramus, dorsal; D, rostrum; E, antennule; F, antenna; G, labrum; H, mandible; I, maxillule. Scale bars: A, 0.2 mm; B, 0.1 mm; C–I, 0.05 mm."figureDoi="http://doi.org/10.5281/zenodo.4591879"httpUri="https://zenodo.org/record/4591879/files/figure.png"pageId="440"pageNumber="441">Fig. 292F</figureCitation>
) 4-segmented; coxa, basis, and first endopodal segment unarmed; compound distal endopodal segment about 3.1 times longer than wide (75×24 μm) and 1.3 times longerthan firstendopodal segment: armed with 1 subdistal and 3 distal setae, plus strongly curved terminal claw, about 0.65 times as long as segment.
<figureCitationid="13562A58EEE93B8DFC0DF925FBF8F8C7"box="[968,1085,1771,1798]"captionStart="FIGURE 292"captionStartId="441.[136,245,1907,1933]"captionTargetBox="[246,1343,216,1845]"captionTargetId="figure-18@441.[197,1391,185,1870]"captionTargetPageId="441"captionText="FIGURE 292. Bysone brevicaudatus sp. nov., female. A, habitus, right; B, urosome, dorsal; C, right caudal ramus, dorsal; D, rostrum; E, antennule; F, antenna; G, labrum; H, mandible; I, maxillule. Scale bars: A, 0.2 mm; B, 0.1 mm; C–I, 0.05 mm."figureDoi="http://doi.org/10.5281/zenodo.4591879"httpUri="https://zenodo.org/record/4591879/files/figure.png"pageId="440"pageNumber="441">Fig. 292G</figureCitation>
) with concave posterior margin, pointed posterolateral corners, and broad posteromedian lobe bearing 2 denticles at apex. Mandible (
<figureCitationid="13562A58EEE93B8DFAE9F8FEFA66F88B"box="[1324,1443,1840,1866]"captionStart="FIGURE 292"captionStartId="441.[136,245,1907,1933]"captionTargetBox="[246,1343,216,1845]"captionTargetId="figure-18@441.[197,1391,185,1870]"captionTargetPageId="441"captionText="FIGURE 292. Bysone brevicaudatus sp. nov., female. A, habitus, right; B, urosome, dorsal; C, right caudal ramus, dorsal; D, rostrum; E, antennule; F, antenna; G, labrum; H, mandible; I, maxillule. Scale bars: A, 0.2 mm; B, 0.1 mm; C–I, 0.05 mm."figureDoi="http://doi.org/10.5281/zenodo.4591879"httpUri="https://zenodo.org/record/4591879/files/figure.png"pageId="440"pageNumber="441">Fig. 292H</figureCitation>
) withbroadcoxalgnathobasebearing 5 teethand 1 spinulelike subsidiary tooth distally at base of distalmost tooth: basis with 1 setaon medial margin; exopod as long as endopod, armed with 2 long proximal and 2 short distal setae: endopodarmedwith 2 and 5 setaeon firstand second segments, respectively; middle seta on second segment markedly longer than other 4 setae. Maxillule (
<figureCitationid="13562A58EEEA3B8EFD5DFF63FCC7FF06"box="[664,770,173,199]"captionStart="FIGURE 292"captionStartId="441.[136,245,1907,1933]"captionTargetBox="[246,1343,216,1845]"captionTargetId="figure-18@441.[197,1391,185,1870]"captionTargetPageId="441"captionText="FIGURE 292. Bysone brevicaudatus sp. nov., female. A, habitus, right; B, urosome, dorsal; C, right caudal ramus, dorsal; D, rostrum; E, antennule; F, antenna; G, labrum; H, mandible; I, maxillule. Scale bars: A, 0.2 mm; B, 0.1 mm; C–I, 0.05 mm."figureDoi="http://doi.org/10.5281/zenodo.4591879"httpUri="https://zenodo.org/record/4591879/files/figure.png"pageId="443"pageNumber="444">Fig. 292I</figureCitation>
) with 9 setae on arthrite, 1 thin seta on coxal endite, 2 unequal setaeon epipodite, 3 unequal setae onmedial margin of basis, 3 setae distally on exopod and 2 setae distally on endopod. Maxilla (
<figureCitationid="13562A58EEEA3B8EFE2DFEFBFDA5FE8E"box="[488,608,309,335]"captionStart="FIGURE 293"captionStartId="442.[136,245,1907,1933]"captionTargetBox="[179,1399,274,1789]"captionTargetId="figure-20@442.[136,1451,236,1819]"captionTargetPageId="442"captionText="FIGURE 293. Bysone brevicaudatus sp. nov., female. A, maxilla; B, maxilliped; C, leg 1; D, leg 2; E, leg 4; F, leg 5. Scale bars: A–C, 0.05 mm; D, E, 0.1 mm; F, 0.02 mm."figureDoi="http://doi.org/10.5281/zenodo.4591881"httpUri="https://zenodo.org/record/4591881/files/figure.png"pageId="443"pageNumber="444">Fig. 293A</figureCitation>
) 5-segmented; syncoxa with 8 setae arranged as 3, 1, 2, and 2; basis with robust claw plus 1 seta; endopod with 1, 1, and 3 setae on first to third segments, respectively. Maxilliped (
<figureCitationid="13562A58EEEA3B8EFD19FE55FF03FE16"captionStart="FIGURE 293"captionStartId="442.[136,245,1907,1933]"captionTargetBox="[179,1399,274,1789]"captionTargetId="figure-20@442.[136,1451,236,1819]"captionTargetPageId="442"captionText="FIGURE 293. Bysone brevicaudatus sp. nov., female. A, maxilla; B, maxilliped; C, leg 1; D, leg 2; E, leg 4; F, leg 5. Scale bars: A–C, 0.05 mm; D, E, 0.1 mm; F, 0.02 mm."figureDoi="http://doi.org/10.5281/zenodo.4591881"httpUri="https://zenodo.org/record/4591881/files/figure.png"pageId="443"pageNumber="444">Fig. 293B</figureCitation>
) unsegmented, armed with 8 medial setae and 1 long outer seta.
<taxonomicNameid="4C6D4D5EEEE83B8CFEF2F8BAFDEAF84F"authority="Kim & Boxshall, 2020"authorityName="Kim & Boxshall"authorityYear="2020"box="[311,559,1908,1934]"class="Copepoda"family="Notodelphyidae"genus="Bysone"higherTaxonomySource="GBIF"kingdom="Animalia"order="Cyclopoida"pageId="441"pageNumber="442"phylum="Arthropoda"rank="species"species="brevicaudatus"status="sp. nov.">
<taxonomicNameid="4C6D4D5EEEEB3B8FFEF1F8BAFDEFF84F"authority="Kim & Boxshall, 2020"authorityName="Kim & Boxshall"authorityYear="2020"box="[308,554,1908,1934]"class="Copepoda"family="Notodelphyidae"genus="Bysone"higherTaxonomySource="GBIF"kingdom="Animalia"order="Cyclopoida"pageId="442"pageNumber="443"phylum="Arthropoda"rank="species"species="brevicaudatus"status="sp. nov.">
<figureCitationid="13562A58EEEA3B8EFEDDFDCFFE55FDDA"box="[280,400,513,539]"captionStart="FIGURE 293"captionStartId="442.[136,245,1907,1933]"captionTargetBox="[179,1399,274,1789]"captionTargetId="figure-20@442.[136,1451,236,1819]"captionTargetPageId="442"captionText="FIGURE 293. Bysone brevicaudatus sp. nov., female. A, maxilla; B, maxilliped; C, leg 1; D, leg 2; E, leg 4; F, leg 5. Scale bars: A–C, 0.05 mm; D, E, 0.1 mm; F, 0.02 mm."figureDoi="http://doi.org/10.5281/zenodo.4591881"httpUri="https://zenodo.org/record/4591881/files/figure.png"pageId="443"pageNumber="444">Fig. 293C</figureCitation>
) small, with 2-segmented rami; second segments of both rami compound, with traces of articulation; inner coxal seta pinnate; outer seta on basis much larger than that of legs 2–4; first exopodal segment lacking inner seta. Legs 2–4 each with 3-segmented exopod and 2-segmented endopod (
<figureCitationid="13562A58EEEA3B8EFDE1FD65FD7AFD07"box="[548,703,683,710]"captionStart="FIGURE 293"captionStartId="442.[136,245,1907,1933]"captionTargetBox="[179,1399,274,1789]"captionTargetId="figure-20@442.[136,1451,236,1819]"captionTargetPageId="442"captionText="FIGURE 293. Bysone brevicaudatus sp. nov., female. A, maxilla; B, maxilliped; C, leg 1; D, leg 2; E, leg 4; F, leg 5. Scale bars: A–C, 0.05 mm; D, E, 0.1 mm; F, 0.02 mm."figureDoi="http://doi.org/10.5281/zenodo.4591881"httpUri="https://zenodo.org/record/4591881/files/figure.png"pageId="443"pageNumber="444">Fig. 293D, E</figureCitation>
); both rami elongate; endopod extending to distal border of second exopodal segment; second endopodal segment about 3 times longer than first in legs 2 and 3, about 4 times longer in leg 4. Inner coxal seta present in legs 2–4, but that of leg 4 minute. Outer and distal setae on exopod of leg 2-4 short, naked, and bluntly tipped. Inner setae on exopod and all setae on endopod of leg 4 small and naked. Armature formula for legs 1–4 as follows:
<taxonomicNameid="4C6D4D5EEEEA3B8EFE00FAFCFDD3FA8A"authorityName="Stock & Humes"authorityYear="1970"box="[453,534,1330,1355]"class="Copepoda"family="Notodelphyidae"genus="Bysone"higherTaxonomySource="GBIF"kingdom="Animalia"order="Cyclopoida"pageId="443"pageNumber="444"phylum="Arthropoda"rank="genus">
<taxonomicNameid="4C6D4D5EEEEA3B8EFE91FA9AFE3EFAAC"authorityName="Stock & Humes"authorityYear="1970"box="[340,507,1363,1390]"class="Copepoda"family="Notodelphyidae"genus="Bysone"higherTaxonomySource="GBIF"kingdom="Animalia"order="Cyclopoida"pageId="443"pageNumber="444"phylum="Arthropoda"rank="species"species="operculatus">
<bibRefCitationid="EFFC4B2CEEEA3B8EFF55FA59FE53FA73"author="Stock, J. H. & Humes, A. G."box="[144,406,1431,1458]"journalOrPublisher="Zoologischer Anzeiger"pageId="443"pageNumber="444"pagination="193 - 212"part="184"refId="ref331227"refString="Stock, J. H. & Humes, A. G. (1970) On four new notodelphyid copepods, associated with an octocoral, Parerythropodium fulvum (Forskal), in Madagascar. Zoologischer Anzeiger, 184, 193 - 212."title="On four new notodelphyid copepods, associated with an octocoral, Parerythropodium fulvum (Forskal)"type="journal article"volumeTitle="Madagascar"year="1970">Stock & Humes, 1970</bibRefCitation>
<taxonomicNameid="4C6D4D5EEEEA3B8EFE69FA56FD61FA70"authority="Kim & Boxshall, 2020"authorityName="Kim & Boxshall"authorityYear="2020"box="[428,676,1431,1457]"class="Copepoda"family="Notodelphyidae"genus="Bysone"higherTaxonomySource="GBIF"kingdom="Animalia"order="Cyclopoida"pageId="443"pageNumber="444"phylum="Arthropoda"rank="species"species="brevicaudatus"status="sp. nov.">
species including: a 6-segmented antennule, 4 setae on the mandibular exopod, 2 and 5 setae, respectively, on the first and second segments of mandibular endopod, a 2- segmented exopod of leg 1, a similar form of maxilliped, and a similar form of the mandibular gnathobase which bears a spinule-like distal subsidiary denticle and has no proximal seta. These similarities are sufficient to confirm the placement of the new species in
<taxonomicNameid="4C6D4D5EEEEA3B8EFD81F904FD50F922"authorityName="Stock & Humes"authorityYear="1970"box="[580,661,1738,1763]"class="Copepoda"family="Notodelphyidae"genus="Bysone"higherTaxonomySource="GBIF"kingdom="Animalia"order="Cyclopoida"pageId="443"pageNumber="444"phylum="Arthropoda"rank="genus">
. The two species can be distinguished by reference to the maxilla, which has a stong claw plus a seta on the basis and the endopod is 3-segmented in the new species. In contrast,
<taxonomicNameid="4C6D4D5EEEEA3B8EFF4DF89CFEEEF8AD"authorityName="Stock & Humes"authorityYear="1970"box="[136,299,1874,1900]"class="Copepoda"family="Notodelphyidae"genus="Bysone"higherTaxonomySource="GBIF"kingdom="Animalia"order="Cyclopoida"pageId="443"pageNumber="444"phylum="Arthropoda"rank="species"species="operculatus">
<taxonomicNameid="4C6D4D5EEEEA3B8EFD37F814FEE3F7D7"authority="Kim & Boxshall, 2020"authorityName="Kim & Boxshall"authorityYear="2020"class="Copepoda"family="Notodelphyidae"genus="Bysone"higherTaxonomySource="GBIF"kingdom="Animalia"order="Cyclopoida"pageId="443"pageNumber="444"phylum="Arthropoda"rank="species"species="brevicaudatus"status="sp. nov.">
<taxonomicNameid="4C6D4D5EEEEA3B8EFD93F832FD3CF7D7"authorityName="Stock & Humes"authorityYear="1970"box="[598,761,2044,2070]"class="Copepoda"family="Notodelphyidae"genus="Bysone"higherTaxonomySource="GBIF"kingdom="Animalia"order="Cyclopoida"pageId="443"pageNumber="444"phylum="Arthropoda"rank="species"species="operculatus">
<taxonomicNameid="4C6D4D5EEEEA3B8EFA56FF60FC0DFF28"authority="Kim & Boxshall, 2020"authorityName="Kim & Boxshall"authorityYear="2020"class="Copepoda"family="Notodelphyidae"genus="Bysone"higherTaxonomySource="GBIF"kingdom="Animalia"order="Cyclopoida"pageId="443"pageNumber="444"phylum="Arthropoda"rank="species"species="brevicaudatus"status="sp. nov.">
<taxonomicNameid="4C6D4D5EEEEA3B8EFB15FF1EFAB7FF28"authorityName="Stock & Humes"authorityYear="1970"box="[1232,1394,207,233]"class="Copepoda"family="Notodelphyidae"genus="Bysone"higherTaxonomySource="GBIF"kingdom="Animalia"order="Cyclopoida"pageId="443"pageNumber="444"phylum="Arthropoda"rank="species"species="operculatus">
<taxonomicNameid="4C6D4D5EEEEA3B8EFA56FF3CFC68FEEC"authorityName="Stock & Humes"authorityYear="1970"class="Copepoda"family="Notodelphyidae"genus="Bysone"higherTaxonomySource="GBIF"kingdom="Animalia"order="Cyclopoida"pageId="443"pageNumber="444"phylum="Arthropoda"rank="species"species="operculatus">
<taxonomicNameid="4C6D4D5EEEEA3B8EFBCBFE96FB7FFEB0"authorityName="Stock & Humes"authorityYear="1970"box="[1038,1210,343,369]"class="Copepoda"family="Notodelphyidae"genus="Bysone"higherTaxonomySource="GBIF"kingdom="Animalia"order="Cyclopoida"pageId="443"pageNumber="444"phylum="Arthropoda"rank="species"species="operculatus">