<documentid="D08262EF8496D2A559DB87A2FC5AF854"ID-DOI="10.11646/zootaxa.5543.1.1"ID-ISSN="1175-5326"ID-Zenodo-Dep="14385085"ID-ZooBank="F6372401-5C79-487C-A8C1-DBDEE7C71671"IM.bibliography_approvedBy="carolina"IM.illustrations_approvedBy="carolina"IM.materialsCitations_approvedBy="carolina"IM.metadata_approvedBy="carolina"IM.tables_approvedBy="carolina"IM.taxonomicNames_approvedBy="carolina"IM.treatments_approvedBy="carolina"checkinTime="1733917159451"checkinUser="plazi"docAuthor="Trokhymchuk, Roman, Schmidt-Rhaesa, Andreas, Utevsky, Serge, Kristensen, Reinhardt Møbjerg & Kieneke, Alexander"docDate="2024"docId="03848797FF95FFFA9B8DE256ADB21728"docLanguage="en"docName="zootaxa.5543.1.1.pdf"docOrigin="Zootaxa 5543 (1)"docSource="https://doi.org/10.11646/zootaxa.5543.1.1"docStyle="DocumentStyle:647186512141C8FC8976D5BCC54AEB7D.9:Zootaxa.2013-.journal_article"docStyleId="647186512141C8FC8976D5BCC54AEB7D"docStyleName="Zootaxa.2013-.journal_article"docStyleVersion="9"docTitle="Coronarctus dissimilis Gomes-Junior, Santos, da Rocha, Santos & Fontoura 2020"docType="treatment"docVersion="3"lastPageNumber="14"masterDocId="FFBDFFEFFF98FFF79B1AE371AC5A1475"masterDocTitle="Towards a better understanding of deep-sea tardigrade biogeography: numerous new records from the Southern Ocean"masterLastPageNumber="39"masterPageNumber="1"pageNumber="14"updateTime="1734116359802"updateUser="ExternalLinkService"zenodo-license-document="CLOSED">
<mods:titleid="1BC20153CC1B1A0044ABBB456EB278B8">Towards a better understanding of deep-sea tardigrade biogeography: numerous new records from the Southern Ocean</mods:title>
<mods:affiliationid="ADB43E013DCB68A1C82308EB1C932033">VN Karazin Kharkiv National University, Svobody Square, 4, 61022, Kharkiv, Ukraine. & German Centre for Marine Biodiversity Research (DZMB), Senckenberg am Meer, Südstrand 44, 26382, Wilhelmshaven, Germany.</mods:affiliation>
<mods:affiliationid="150CFAB344E1A180D40CCF59436CB7A1">ZTM, Leibniz Institute for the Analysis of Biodiversity Change, Martin-Luther-King-Platz 3, 20146 Hamburg, Germany.</mods:affiliation>
<mods:affiliationid="01493C12E3156E3D8D25F76694798E3C">Natural History Museum of Denmark, University of Copenhagen, Gothersgade 130, 1123 Copenhagen, Denmark.</mods:affiliation>
<mods:affiliationid="DD450251799C8C38213E876CBF17B8A8">German Centre for Marine Biodiversity Research (DZMB), Senckenberg am Meer, Südstrand 44, 26382, Wilhelmshaven, Germany.</mods:affiliation>
<taxonomicNameid="4C2D4D02FF95FFFA9B8DE256A8D71534"ID-CoL="9X6RK"authority="Gomes-Junior, Santos, da Rocha, Santos & Fontoura, 2020"authorityName="Gomes-Junior, Santos, da Rocha, Santos & Fontoura"authorityYear="2020"box="[151,1165,294,322]"class="Heterotardigrada"family="Coronarctidae"genus="Coronarctus"kingdom="Animalia"order="Arthrotardigrada"pageId="13"pageNumber="14"phylum="Tardigrada"rank="species"species="dissimilis">
<bibRefCitationid="EFBC4B70FF95FFFA9AB4E257A8D71534"author="Gomes-Junior, E. & Santos, E. & da Rocha, C. M. & Santos, P. J. & Fontoura, P."box="[430,1165,294,321]"pageId="13"pageNumber="14"refId="ref19620"refString="Gomes-Junior, E., Santos, E., da Rocha, C. M., Santos, P. J. & Fontoura, P. (2020) The deep-sea genus Coronarctus (Tardigrada, Arthrotardigrada) in Brazil, south-western Atlantic Ocean, with the description of three new species. Diversity, 12 (2), 63. https: // doi. org / 10.3390 / d 12020063"type="journal volume"year="2020">Gomes-Júnior, Santos, da Rocha, Santos & Fontoura, 2020</bibRefCitation>
<figureCitationid="13162A04FF95FFFA9BDDE2C6AD5115A4"box="[199,267,439,465]"captionStart="FIGURE 6"captionStartId="14.[151,250,1648,1672]"captionTargetBox="[206,1382,185,1622]"captionTargetId="figure-19@14.[203,1385,182,1625]"captionTargetPageId="14"captionText="FIGURE 6. Genus Coronarctus. A Coronarctus dissimilis, female, light microscopy (DIC), ventro-sagittal view. B Coronarctus dissimilis, female, light microscopy (DIC), head, dorsal view, note leg I accessory spines on the external and internal claws (arrowheads). C Coronarctus dissimilis, female, light microscopy (DIC), head ventral view. C2 Coronarctus dissimilis, female, light microscopy (DIC), head ventral view, secondary clava indicated. D Coronarctus dissimilis, female, light microscopy (DIC), leg IV, note leg IV accessory spines on the both external and internal claws (arrowheads). E Coronarctus tenellus, male, light microscopy (DIC), ventral position. F Coronarctus tenellus, male, light microscopy (DIC), head, dorsal view. G Coronarctus tenellus, male, light microscopy (DIC), head, ventral view. G2 Coronarctus tenellus, male, light microscopy (DIC), head, ventral view, secondary clava indicated. H Coronarctus tenellus, light microscopy (DIC), leg IV, note leg IV accessory spines just on the both internal claw (arrowhead). I Coronarctus tenellus, juvenile, light microscopy (DIC), sagittal position, note leg IV with two internal claws and two growing external claws (arrowhead).Abbreviations: bt—buccal tube, cE—cirrus E, mc—median cirrus, pb—pharyngeal bulb, sc—secondary clava, se—leg sensory organ."figureDoi="http://doi.org/10.5281/zenodo.14385101"httpUri="https://zenodo.org/record/14385101/files/figure.png"pageId="13"pageNumber="14">Fig. 6</figureCitation>
<tableCitationid="C6AF033AFF95FFFA9ADDE2C6AE7515A4"box="[455,559,439,465]"captionStart="TABLE 1"captionStartId="3.[152,244,469,495]"captionTargetPageId="3"captionText="TABLE 1. All corer deployments of expeditions ANDEEP 1, 2, 3 and ANDEEP-SYSTCO that contained Tardigrada. For two deployments at the Shona Ridge, no information about position and depth was available. GKG: boxcorer with 0.25 m2 sampling area, MUC (A): multicorer with 70.85 cm2 sampling area per core tube, MUC (B): multicorer with 69.36 cm2 sampling area per core tube, MUC (C): multicorer with 25.5 cm2 sampling area per core tube"httpUri="http://table.plazi.org/id/DF526609FF9BFFF49B82E2A4A8B31642"pageId="13"pageNumber="14"tableUuid="DF526609FF9BFFF49B82E2A4A8B31642">Table 1.2</tableCitation>
Large female (273 µm, n=1) with claw heteromorphy (
<figureCitationid="13162A04FF95FFFA9822E152AFCE1648"box="[824,916,547,573]"captionStart="FIGURE 6"captionStartId="14.[151,250,1648,1672]"captionTargetBox="[206,1382,185,1622]"captionTargetId="figure-19@14.[203,1385,182,1625]"captionTargetPageId="14"captionText="FIGURE 6. Genus Coronarctus. A Coronarctus dissimilis, female, light microscopy (DIC), ventro-sagittal view. B Coronarctus dissimilis, female, light microscopy (DIC), head, dorsal view, note leg I accessory spines on the external and internal claws (arrowheads). C Coronarctus dissimilis, female, light microscopy (DIC), head ventral view. C2 Coronarctus dissimilis, female, light microscopy (DIC), head ventral view, secondary clava indicated. D Coronarctus dissimilis, female, light microscopy (DIC), leg IV, note leg IV accessory spines on the both external and internal claws (arrowheads). E Coronarctus tenellus, male, light microscopy (DIC), ventral position. F Coronarctus tenellus, male, light microscopy (DIC), head, dorsal view. G Coronarctus tenellus, male, light microscopy (DIC), head, ventral view. G2 Coronarctus tenellus, male, light microscopy (DIC), head, ventral view, secondary clava indicated. H Coronarctus tenellus, light microscopy (DIC), leg IV, note leg IV accessory spines just on the both internal claw (arrowhead). I Coronarctus tenellus, juvenile, light microscopy (DIC), sagittal position, note leg IV with two internal claws and two growing external claws (arrowhead).Abbreviations: bt—buccal tube, cE—cirrus E, mc—median cirrus, pb—pharyngeal bulb, sc—secondary clava, se—leg sensory organ."figureDoi="http://doi.org/10.5281/zenodo.14385101"httpUri="https://zenodo.org/record/14385101/files/figure.png"pageId="13"pageNumber="14">Fig. 6A</figureCitation>
). On the dorsal side a median cirrus is placed close between the posterior edges of the secondary clavae (
<figureCitationid="13162A04FF95FFFA9859E136AFC41614"box="[835,926,583,609]"captionStart="FIGURE 6"captionStartId="14.[151,250,1648,1672]"captionTargetBox="[206,1382,185,1622]"captionTargetId="figure-19@14.[203,1385,182,1625]"captionTargetPageId="14"captionText="FIGURE 6. Genus Coronarctus. A Coronarctus dissimilis, female, light microscopy (DIC), ventro-sagittal view. B Coronarctus dissimilis, female, light microscopy (DIC), head, dorsal view, note leg I accessory spines on the external and internal claws (arrowheads). C Coronarctus dissimilis, female, light microscopy (DIC), head ventral view. C2 Coronarctus dissimilis, female, light microscopy (DIC), head ventral view, secondary clava indicated. D Coronarctus dissimilis, female, light microscopy (DIC), leg IV, note leg IV accessory spines on the both external and internal claws (arrowheads). E Coronarctus tenellus, male, light microscopy (DIC), ventral position. F Coronarctus tenellus, male, light microscopy (DIC), head, dorsal view. G Coronarctus tenellus, male, light microscopy (DIC), head, ventral view. G2 Coronarctus tenellus, male, light microscopy (DIC), head, ventral view, secondary clava indicated. H Coronarctus tenellus, light microscopy (DIC), leg IV, note leg IV accessory spines just on the both internal claw (arrowhead). I Coronarctus tenellus, juvenile, light microscopy (DIC), sagittal position, note leg IV with two internal claws and two growing external claws (arrowhead).Abbreviations: bt—buccal tube, cE—cirrus E, mc—median cirrus, pb—pharyngeal bulb, sc—secondary clava, se—leg sensory organ."figureDoi="http://doi.org/10.5281/zenodo.14385101"httpUri="https://zenodo.org/record/14385101/files/figure.png"pageId="13"pageNumber="14">Fig. 6B</figureCitation>
). Edges of secondary clavae are also clearly visible on the ventral side (
<figureCitationid="13162A04FF95FFFA9ADBE11AAE6D16F0"box="[449,567,619,645]"captionStart="FIGURE 6"captionStartId="14.[151,250,1648,1672]"captionTargetBox="[206,1382,185,1622]"captionTargetId="figure-19@14.[203,1385,182,1625]"captionTargetPageId="14"captionText="FIGURE 6. Genus Coronarctus. A Coronarctus dissimilis, female, light microscopy (DIC), ventro-sagittal view. B Coronarctus dissimilis, female, light microscopy (DIC), head, dorsal view, note leg I accessory spines on the external and internal claws (arrowheads). C Coronarctus dissimilis, female, light microscopy (DIC), head ventral view. C2 Coronarctus dissimilis, female, light microscopy (DIC), head ventral view, secondary clava indicated. D Coronarctus dissimilis, female, light microscopy (DIC), leg IV, note leg IV accessory spines on the both external and internal claws (arrowheads). E Coronarctus tenellus, male, light microscopy (DIC), ventral position. F Coronarctus tenellus, male, light microscopy (DIC), head, dorsal view. G Coronarctus tenellus, male, light microscopy (DIC), head, ventral view. G2 Coronarctus tenellus, male, light microscopy (DIC), head, ventral view, secondary clava indicated. H Coronarctus tenellus, light microscopy (DIC), leg IV, note leg IV accessory spines just on the both internal claw (arrowhead). I Coronarctus tenellus, juvenile, light microscopy (DIC), sagittal position, note leg IV with two internal claws and two growing external claws (arrowhead).Abbreviations: bt—buccal tube, cE—cirrus E, mc—median cirrus, pb—pharyngeal bulb, sc—secondary clava, se—leg sensory organ."figureDoi="http://doi.org/10.5281/zenodo.14385101"httpUri="https://zenodo.org/record/14385101/files/figure.png"pageId="13"pageNumber="14">Fig. 6C, C</figureCitation>
<figureCitationid="13162A04FF95FFFA992DE11AAE1C16F0"box="[567,582,619,645]"captionStart="FIGURE 2"captionStartId="8.[151,250,1863,1887]"captionTargetBox="[183,1395,226,1814]"captionTargetId="graphics-20@8.[186,1402,183,1838]"captionText="FIGURE 2. Absolute abundances of Tardigrada from all 130 analysed core samples of expeditions ANDEEP-1 to 3 and ANDEEP-SYSTCO to the Southern Ocean plotted against depth. Samples were taken at different working areas in the Cape Basin, in the Lazarev Sea, in the Weddell Sea, in the Ona Basin, and at different working stations in the Drake Passage"figureDoi="http://doi.org/10.5281/zenodo.14452174"httpUri="https://zenodo.org/record/14452174/files/figure.png"pageId="13"pageNumber="14">2</figureCitation>
). Both external and internal claws are with accessory spines on each leg (
<figureCitationid="13162A04FF95FFFA9E75E11AAC8416DC"captionStart="FIGURE 6"captionStartId="14.[151,250,1648,1672]"captionTargetBox="[206,1382,185,1622]"captionTargetId="figure-19@14.[203,1385,182,1625]"captionTargetPageId="14"captionText="FIGURE 6. Genus Coronarctus. A Coronarctus dissimilis, female, light microscopy (DIC), ventro-sagittal view. B Coronarctus dissimilis, female, light microscopy (DIC), head, dorsal view, note leg I accessory spines on the external and internal claws (arrowheads). C Coronarctus dissimilis, female, light microscopy (DIC), head ventral view. C2 Coronarctus dissimilis, female, light microscopy (DIC), head ventral view, secondary clava indicated. D Coronarctus dissimilis, female, light microscopy (DIC), leg IV, note leg IV accessory spines on the both external and internal claws (arrowheads). E Coronarctus tenellus, male, light microscopy (DIC), ventral position. F Coronarctus tenellus, male, light microscopy (DIC), head, dorsal view. G Coronarctus tenellus, male, light microscopy (DIC), head, ventral view. G2 Coronarctus tenellus, male, light microscopy (DIC), head, ventral view, secondary clava indicated. H Coronarctus tenellus, light microscopy (DIC), leg IV, note leg IV accessory spines just on the both internal claw (arrowhead). I Coronarctus tenellus, juvenile, light microscopy (DIC), sagittal position, note leg IV with two internal claws and two growing external claws (arrowhead).Abbreviations: bt—buccal tube, cE—cirrus E, mc—median cirrus, pb—pharyngeal bulb, sc—secondary clava, se—leg sensory organ."figureDoi="http://doi.org/10.5281/zenodo.14385101"httpUri="https://zenodo.org/record/14385101/files/figure.png"pageId="13"pageNumber="14">Fig. 6B, D</figureCitation>
). The presence of gonopore and seminal receptacles allows us to be secure with sex determination.
<taxonomicNameid="4C2D4D02FF95FFFA9BDDE18DAD0E1760"authorityName="Gomes-Junior, Santos, da Rocha, Santos & Fontoura"authorityYear="2020"box="[199,340,763,790]"class="Heterotardigrada"family="Coronarctidae"genus="Coronarctus"kingdom="Animalia"order="Arthrotardigrada"pageId="13"pageNumber="14"phylum="Tardigrada"rank="species"species="dissimilis">
is recognisable by the secondary clavae shape and median cirrus placed on the posterior end of secondary clavae. This representative exhibits claw heteromorphy and accessory spines as in the original description of
<bibRefCitationid="EFBC4B70FF95FFFA9BACE032ADB21728"author="Gomes-Junior, E. & Santos, E. & da Rocha, C. M. & Santos, P. J. & Fontoura, P."box="[182,488,835,861]"pageId="13"pageNumber="14"refId="ref19620"refString="Gomes-Junior, E., Santos, E., da Rocha, C. M., Santos, P. J. & Fontoura, P. (2020) The deep-sea genus Coronarctus (Tardigrada, Arthrotardigrada) in Brazil, south-western Atlantic Ocean, with the description of three new species. Diversity, 12 (2), 63. https: // doi. org / 10.3390 / d 12020063"type="journal volume"year="2020">
