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<document ID-DOI="http://dx.doi.org/10.3897/BDJ.8.e49935" ID-PMC="PMC7093573" ID-Pensoft-Pub="1314-2828-8-e49935" ID-Pensoft-UUID="FE34E55B42A953BE9A4166449964BC97" ID-PubMed="32231462" ID-ZooBank="EB5F68D864F34A449F83C7291CEBBA03" ModsDocID="1314-2828-8-e49935" checkinTime="1584547024729" checkinUser="pensoft" docAuthor="Wang, Jianjia, Huang, Dingyong, Niu, Wentao &amp; Zhang, Feng" docDate="2020" docId="D7217174DF8051138173783DB2ED0575" docLanguage="en" docName="BiodivDatJour 8: e49935" docOrigin="Biodiversity Data Journal 8" docSource="http://dx.doi.org/10.3897/BDJ.8.e49935" docTitle="Cilunculus tricuspis Wang &amp; Huang &amp; Niu &amp; Zhang 2020, sp. n." docType="treatment" docVersion="4" id="FE34E55B42A953BE9A4166449964BC97" lastPageNumber="49935" masterDocId="FE34E55B42A953BE9A4166449964BC97" masterDocTitle="A new species of Cilunculus Loman, 1908 (Arthropoda: Pycnogonida: Ammotheidae) from the South-western Indian Ocean" masterLastPageNumber="49935" masterPageNumber="49935" pageNumber="49935" updateTime="1668125389124" updateUser="ExternalLinkService">
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<mods:title>A new species of Cilunculus Loman, 1908 (Arthropoda: Pycnogonida: Ammotheidae) from the South-western Indian Ocean</mods:title>
</mods:titleInfo>
<mods:name type="personal">
<mods:role>
<mods:roleTerm>Author</mods:roleTerm>
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<mods:namePart>Wang, Jianjia</mods:namePart>
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<mods:name type="personal">
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<mods:roleTerm>Author</mods:roleTerm>
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<mods:namePart>Huang, Dingyong</mods:namePart>
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<mods:roleTerm>Author</mods:roleTerm>
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<mods:namePart>Niu, Wentao</mods:namePart>
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<mods:roleTerm>Author</mods:roleTerm>
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<mods:namePart>Zhang, Feng</mods:namePart>
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<mods:title>Biodiversity Data Journal</mods:title>
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<mods:date>2020</mods:date>
<mods:detail type="volume">
<mods:number>8</mods:number>
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<mods:start>49935</mods:start>
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<mods:url>http://dx.doi.org/10.3897/BDJ.8.e49935</mods:url>
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<mods:classification>journal article</mods:classification>
<mods:identifier type="DOI">http://dx.doi.org/10.3897/BDJ.8.e49935</mods:identifier>
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<subSubSection pageId="0" pageNumber="49935" type="nomenclature">
<paragraph pageId="0" pageNumber="49935">
<taxonomicName LSID="D7217174-DF80-5113-8173-783DB2ED0575" authority="2020" authorityName="Wang &amp; Huang &amp; Niu &amp; Zhang" authorityYear="2020" class="Pycnogonida" family="Ammotheidae" genus="Cilunculus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Cilunculus tricuspis" order="Pantopoda" pageId="0" pageNumber="49935" phylum="Arthropoda" rank="species" species="tricuspis" status="sp. n.">Cilunculus tricuspis 2020</taxonomicName>
<taxonomicNameLabel pageId="0" pageNumber="49935">sp. n.</taxonomicNameLabel>
</paragraph>
</subSubSection>
<subSubSection pageId="0" pageNumber="49935" type="materials_examined">
<paragraph pageId="0" pageNumber="49935">Materials</paragraph>
<paragraph pageId="0" pageNumber="49935">
<materialsCitation collectingMethod="TV-grab" collectionCode="MNRTIO" latitude="-37.466" longitude="51.729" pageId="0" pageNumber="49935" specimenCode="20 VIIS 4 TVG 04.01" specimenCount="1" specimenCount-male="1" typeStatus="Holotype">
<emphasis bold="true" pageId="0" pageNumber="49935">Type status:</emphasis>
<typeStatus pageId="0" pageNumber="49935">Holotype</typeStatus>
.
<emphasis bold="true" pageId="0" pageNumber="49935">Occurrence:</emphasis>
catalogNumber:
<specimenCode pageId="0" pageNumber="49935">20VIIS4TVG04.01</specimenCode>
; individualCount:
<specimenCount pageId="0" pageNumber="49935">1</specimenCount>
; sex:
<specimenType pageId="0" pageNumber="49935">male</specimenType>
; lifeStage:
<specimenType pageId="0" pageNumber="49935">adult</specimenType>
;
<emphasis bold="true" pageId="0" pageNumber="49935">Taxon:</emphasis>
kingdom: Animalia; phylum: Arthropoda; class: Pycnogonida; order: Pantopoda; family: Ammotheidae; genus: Cilunculus; specificEpithet: tricuspis;
<emphasis bold="true" pageId="0" pageNumber="49935">Location:</emphasis>
locationID: South-western Indian Ocean; verbatimDepth: 1585 m; verbatimLatitude: 37.466S; verbatimLongitude: 51.729E; decimalLatitude:
<geoCoordinate orientation="latitude" pageId="0" pageNumber="49935" value="-37.466">-37.466</geoCoordinate>
; decimalLongitude:
<geoCoordinate orientation="longitude" pageId="0" pageNumber="49935" value="51.729">51.729</geoCoordinate>
;
<emphasis bold="true" pageId="0" pageNumber="49935">Identification:</emphasis>
identifiedBy:
<determinerName pageId="0" pageNumber="49935">Jianjia Wang, Dingyong Huang, Wentao Niu, Feng Zhang</determinerName>
;
<emphasis bold="true" pageId="0" pageNumber="49935">Event:</emphasis>
samplingProtocol:
<collectingMethod pageId="0" pageNumber="49935">TV-grab</collectingMethod>
; year: 2009; month: February; day: 7;
<emphasis bold="true" pageId="0" pageNumber="49935">Record Level:</emphasis>
institutionID: Third Institute of Oceanography, Ministry of Natural Resources; institutionCode:
<collectionCode pageId="0" pageNumber="49935">MNRTIO</collectionCode>
</materialsCitation>
<materialsCitation collectingMethod="TV-grab" collectionCode="MNRTIO" latitude="-37.466" longitude="51.729" pageId="0" pageNumber="49935" specimenCode="20 VIIS 4 TVG 04.02" specimenCount="1" specimenCount-male="1" typeStatus="Paratype">
<emphasis bold="true" pageId="0" pageNumber="49935">Type status:</emphasis>
<typeStatus pageId="0" pageNumber="49935">Paratype</typeStatus>
.
<emphasis bold="true" pageId="0" pageNumber="49935">Occurrence:</emphasis>
catalogNumber:
<specimenCode pageId="0" pageNumber="49935">20VIIS4TVG04.02</specimenCode>
; individualCount:
<specimenCount pageId="0" pageNumber="49935">1</specimenCount>
; sex:
<specimenType pageId="0" pageNumber="49935">male</specimenType>
; lifeStage:
<specimenType pageId="0" pageNumber="49935">adult</specimenType>
;
<emphasis bold="true" pageId="0" pageNumber="49935">Taxon:</emphasis>
kingdom: Animalia; phylum: Arthropoda; class: Pycnogonida; order: Pantopoda; family: Ammotheidae; genus: Cilunculus; specificEpithet: tricuspis;
<emphasis bold="true" pageId="0" pageNumber="49935">Location:</emphasis>
locationID: South-western Indian Ocean; verbatimDepth: 1585 m; verbatimLatitude: 37.466S; verbatimLongitude: 51.729E; decimalLatitude:
<geoCoordinate orientation="latitude" pageId="0" pageNumber="49935" value="-37.466">-37.466</geoCoordinate>
; decimalLongitude:
<geoCoordinate orientation="longitude" pageId="0" pageNumber="49935" value="51.729">51.729</geoCoordinate>
;
<emphasis bold="true" pageId="0" pageNumber="49935">Identification:</emphasis>
identifiedBy:
<determinerName pageId="0" pageNumber="49935">Jianjia Wang, Dingyong Huang, Wentao Niu, Feng Zhang</determinerName>
;
<emphasis bold="true" pageId="0" pageNumber="49935">Event:</emphasis>
samplingProtocol:
<collectingMethod pageId="0" pageNumber="49935">TV-grab</collectingMethod>
; year: 2009; month: February; day: 7;
<emphasis bold="true" pageId="0" pageNumber="49935">Record Level:</emphasis>
institutionID: Third Institute of Oceanography, Ministry of Natural Resources; institutionCode:
<collectionCode pageId="0" pageNumber="49935">MNRTIO</collectionCode>
</materialsCitation>
</paragraph>
</subSubSection>
<subSubSection pageId="0" pageNumber="49935" type="description">
<paragraph pageId="0" pageNumber="49935">Description</paragraph>
<paragraph pageId="0" pageNumber="49935">
Body length 1.79 mm. Trunk glabrous (Fig.
<figureCitation captionStart="Figure 1" captionStartId="F5540629" captionText="Figure 1. Cilunculus tricuspis sp. n., male; holotype: a. trunk, dorsal view; c. trunk, lateral view; e. proboscis, frontal view; f. palp; g. oviger; h. leg 3; i. tarsus, propodus and claws of leg 3, enlarged. Male; paratype: b. trunk, dorsal view; d. trunk, lateral view. Scale bars a-d = 0.5 mm; e, f, g, i = 0.2 mm; h = 1 mm." figureDoi="10.3897/BDJ.8.e49935.figure1" httpUri="https://binary.pensoft.net/fig/385724" pageId="0" pageNumber="49935">1</figureCitation>
a-e), completely segmented, dorsal segmentation lines raised and swollen. Lateral processes slender and smooth, well separated by a little more than their own diameter. Cephalon extends anteriorly into a hood, over 1/5 of the length of the chelifores. Ocular tubercle inconspicuous, dome-shaped, without eyes. Abdomen spindle-shape, not articulating to the body, extends horizontally to the middle of the second coxae of leg pair 4.
</paragraph>
<paragraph pageId="0" pageNumber="49935">Proboscis barrel-shaped, 0.7 times as long as trunk, with two dorsal and one ventral triangular processes close to mouth.</paragraph>
<paragraph pageId="0" pageNumber="49935">Chelifores stout, with one-articled scape; chela atrophied, without fingers.</paragraph>
<paragraph pageId="0" pageNumber="49935">
Palp of nine articles (Fig.
<figureCitation captionStart="Figure 1" captionStartId="F5540629" captionText="Figure 1. Cilunculus tricuspis sp. n., male; holotype: a. trunk, dorsal view; c. trunk, lateral view; e. proboscis, frontal view; f. palp; g. oviger; h. leg 3; i. tarsus, propodus and claws of leg 3, enlarged. Male; paratype: b. trunk, dorsal view; d. trunk, lateral view. Scale bars a-d = 0.5 mm; e, f, g, i = 0.2 mm; h = 1 mm." figureDoi="10.3897/BDJ.8.e49935.figure1" httpUri="https://binary.pensoft.net/fig/385724" pageId="0" pageNumber="49935">1</figureCitation>
f); article 2 longest, almost 1.5 times as long as article 4; distal five articles very short, each with row of ventral setae.
</paragraph>
<paragraph pageId="0" pageNumber="49935">
Oviger glabrous (Fig.
<figureCitation captionStart="Figure 1" captionStartId="F5540629" captionText="Figure 1. Cilunculus tricuspis sp. n., male; holotype: a. trunk, dorsal view; c. trunk, lateral view; e. proboscis, frontal view; f. palp; g. oviger; h. leg 3; i. tarsus, propodus and claws of leg 3, enlarged. Male; paratype: b. trunk, dorsal view; d. trunk, lateral view. Scale bars a-d = 0.5 mm; e, f, g, i = 0.2 mm; h = 1 mm." figureDoi="10.3897/BDJ.8.e49935.figure1" httpUri="https://binary.pensoft.net/fig/385724" pageId="0" pageNumber="49935">1</figureCitation>
g); article 2 longest, slightly longer than article 4; distal five articles short, of decreasing length, article 7 to article 10 with compound spines, formula 1:1:1:2, spines on article 10 thicker.
</paragraph>
<paragraph pageId="0" pageNumber="49935">Third leg (h-i) slender, longest articles with long setae. First coxa short, with few setae; second coxa 1.5 times as long as first or third coxa, with ventrodistal and dorsal protuberances; femur 2.6 times as long as second coxa, with dorsal and distal long setae, tall cement gland tube dorso-distally; first tibia slightly longer than second tibia and 1.4 times longer than femur, with dorsal, lateral and ventral rows of setae; second tibia with ventral and lateral rows of setae and sparse dorsal setae; tarsus small, subtriangular, with one protuberance dorsally, one spine and few setae ventrally; propodus without heel, sole with seven spines and two distal setae, with two long setae dorsally and some short setae dorsally and distally; main claw slender, gently curved, 0.6 times as long as propodus; auxiliary claws half the length of main claw.</paragraph>
<paragraph pageId="0" pageNumber="49935">Female unknown.</paragraph>
<paragraph pageId="0" pageNumber="49935">
<emphasis italics="true" pageId="0" pageNumber="49935">Measurements of holotype in mm</emphasis>
: trunk length from the anterior margin of the cephalon to the tip of 4th lateral processes 1.79; width across second lateral processes 1.0; proboscis length 1.27; abdomen length 0.55. Chelifore scape length 0.24. Palp article 1 (Pa1) 0.07; 2 (Pa2) 0.51; Pa3 0.08; Pa4 0.33; Pa5 0.08; Pa6 0.09; Pa7 0.08; Pa8 0.07; Pa9 0.06. Oviger article 1 (O1) 0.11; O2 0.39; O3 0.16; O4 0.35; O5 0.21; O6 0.10; O7 0.08; O8 0.08; O9 0.07; O10 0.02. Third leg: coxa-1 0.26, coxa-2 0.40, coxa-3 0.24, femur 1.06, tibia-1 1.49, tibia-2 1.41, tarsus 0.11, propodus 0.54, main claw 0.32, auxiliary claw 0.16.
</paragraph>
</subSubSection>
<subSubSection pageId="0" pageNumber="49935" type="etymology">
<paragraph pageId="0" pageNumber="49935">Etymology</paragraph>
<paragraph pageId="0" pageNumber="49935">
This specific name is from the Latin
<taxonomicName authorityName="Wang &amp; Huang &amp; Niu &amp; Zhang" authorityYear="2020" class="Pycnogonida" family="Ammotheidae" genus="Cilunculus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="tricuspis" order="Pantopoda" pageId="0" pageNumber="49935" phylum="Arthropoda" rank="species" species="tricuspis">
<emphasis italics="true" pageId="0" pageNumber="49935">tricuspis</emphasis>
</taxonomicName>
(three-pointed), referring to the three processes on the proboscis.
</paragraph>
</subSubSection>
<subSubSection pageId="0" pageNumber="49935" type="distribution">
<paragraph pageId="0" pageNumber="49935">Distribution</paragraph>
<paragraph pageId="0" pageNumber="49935">This new species was found only at the type locality, the substrate of which consisted of white and yellow foraminiferan oozing along with dead coral and shells and a small amount of black basalt.</paragraph>
</subSubSection>
<subSubSection pageId="0" pageNumber="49935" type="taxon discussion">
<paragraph pageId="0" pageNumber="49935">Taxon discussion</paragraph>
<paragraph pageId="0" pageNumber="49935">
According to the key given by
<bibRefCitation author="Stock, JH" journalOrPublisher="Resultats des Campagnes MUSORSTOM, Vol. 18" pageId="0" pageNumber="49935" refId="B5474289" refString="Stock, JH, 1997. . Resultats des Campagnes MUSORSTOM, Vol. 18 176" volume="176" year="1997">Stock (1997)</bibRefCitation>
, this new species would identify as
<taxonomicName authorityName="Nakamura &amp; Child" authorityYear="1983" class="Pycnogonida" family="Ammotheidae" genus="Cilunculus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Cilunculus haradai" order="Pantopoda" pageId="0" pageNumber="49935" phylum="Arthropoda" rank="species" species="haradai">
<emphasis italics="true" pageId="0" pageNumber="49935">Cilunculus haradai</emphasis>
</taxonomicName>
Nakamura &amp; Child, 1983 and the common characteristics between these two species impelled us to consider this new species as a deep-sea form of
<taxonomicName lsidName="C. haradai" pageId="0" pageNumber="49935" rank="species" species="haradai">
<emphasis italics="true" pageId="0" pageNumber="49935">C. haradai</emphasis>
</taxonomicName>
. After further examination, several differences with
<taxonomicName lsidName="C. haradai" pageId="0" pageNumber="49935" rank="species" species="haradai">
<emphasis italics="true" pageId="0" pageNumber="49935">C. haradai</emphasis>
</taxonomicName>
convinced us to establish this new species, as it presented shorter and blind ocular tubercle, glabrous lateral processes, fewer setae on legs, absence of heel spines and almost horizontal proboscis with three distal processes.
</paragraph>
<paragraph pageId="0" pageNumber="49935">
<taxonomicName authorityName="Wang &amp; Huang &amp; Niu &amp; Zhang" authorityYear="2020" class="Pycnogonida" family="Ammotheidae" genus="Cilunculus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Cilunculus tricuspis" order="Pantopoda" pageId="0" pageNumber="49935" phylum="Arthropoda" rank="species" species="tricuspis">
<emphasis italics="true" pageId="0" pageNumber="49935">Cilunculus tricuspis</emphasis>
</taxonomicName>
n. sp., keying to couplet 15 of
<normalizedToken originalValue="Stocks">Stock's</normalizedToken>
key, was distinct from
<taxonomicName lsidName="C. cymobostrychos" pageId="0" pageNumber="49935" rank="species" species="cymobostrychos">
<emphasis italics="true" pageId="0" pageNumber="49935">C. cymobostrychos</emphasis>
</taxonomicName>
and
<taxonomicName lsidName="C. roni" pageId="0" pageNumber="49935" rank="species" species="roni">
<emphasis italics="true" pageId="0" pageNumber="49935">C. roni</emphasis>
</taxonomicName>
in glabrous trunk, without wavy barbed setae or tubercles and distinguished from
<taxonomicName lsidName="C. mergus" pageId="0" pageNumber="49935" rank="species" species="mergus">
<emphasis italics="true" pageId="0" pageNumber="49935">C. mergus</emphasis>
</taxonomicName>
and
<taxonomicName lsidName="C. roni" pageId="0" pageNumber="49935" rank="species" species="roni">
<emphasis italics="true" pageId="0" pageNumber="49935">C. roni</emphasis>
</taxonomicName>
by absence of a dorsal hump on the propodus and is also different from
<taxonomicName lsidName="C. misesetosus" pageId="0" pageNumber="49935" rank="species" species="misesetosus">
<emphasis italics="true" pageId="0" pageNumber="49935">C. misesetosus</emphasis>
</taxonomicName>
which has long auxiliary claws almost equal to the main claw.
</paragraph>
<paragraph pageId="0" pageNumber="49935">
Amongst the 32 species, only
<taxonomicName authorityName="Clark" authorityYear="1963" class="Pycnogonida" family="Ammotheidae" genus="Cilunculus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Cilunculus australiensis" order="Pantopoda" pageId="0" pageNumber="49935" phylum="Arthropoda" rank="species" species="australiensis">
<emphasis italics="true" pageId="0" pageNumber="49935">Cilunculus australiensis</emphasis>
</taxonomicName>
Clark, 1963,
<taxonomicName authorityName="Nakamura &amp; Child" authorityYear="1991" class="Pycnogonida" family="Ammotheidae" genus="Cilunculus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Cilunculus galeritus" order="Pantopoda" pageId="0" pageNumber="49935" phylum="Arthropoda" rank="species" species="galeritus">
<emphasis italics="true" pageId="0" pageNumber="49935">Cilunculus galeritus</emphasis>
</taxonomicName>
Nakamura &amp; Child, 1991 and
<taxonomicName lsidName="C. roni" pageId="0" pageNumber="49935" rank="species" species="roni">
<emphasis italics="true" pageId="0" pageNumber="49935">C. roni</emphasis>
</taxonomicName>
showed the proboscis adorned with processes, but the new species could be easily distinguished from
<taxonomicName lsidName="C. australiensis" pageId="0" pageNumber="49935" rank="species" species="australiensis">
<emphasis italics="true" pageId="0" pageNumber="49935">C. australiensis</emphasis>
</taxonomicName>
which presented tall spinose tubercles on the trunk and
<taxonomicName lsidName="C. galeritus" pageId="0" pageNumber="49935" rank="species" species="galeritus">
<emphasis italics="true" pageId="0" pageNumber="49935">C. galeritus</emphasis>
</taxonomicName>
which presented the unique larger cephalic segment hood and could be distinguished from
<taxonomicName lsidName="C. roni" pageId="0" pageNumber="49935" rank="species" species="roni">
<emphasis italics="true" pageId="0" pageNumber="49935">C. roni</emphasis>
</taxonomicName>
by the tubercles on the trunk and legs.
</paragraph>
<paragraph pageId="0" pageNumber="49935">
There are few species of
<taxonomicName authorityName="Loman" authorityYear="1908" class="Pycnogonida" family="Ammotheidae" genus="Cilunculus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Cilunculus" order="Pantopoda" pageId="0" pageNumber="49935" phylum="Arthropoda" rank="genus">
<emphasis italics="true" pageId="0" pageNumber="49935">Cilunculus</emphasis>
</taxonomicName>
reported from the Indian Ocean. Amongst these are
<taxonomicName baseAuthorityName="Stock" baseAuthorityYear="1968" class="Pycnogonida" family="Ammotheidae" genus="Cilunculus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Cilunculus bifidus" order="Pantopoda" pageId="0" pageNumber="49935" phylum="Arthropoda" rank="species" species="bifidus">
<emphasis italics="true" pageId="0" pageNumber="49935">Cilunculus bifidus</emphasis>
</taxonomicName>
(Stock, 1968) only found off False Bay (South Africa) (1361 m) (
<bibRefCitation author="Stock, Jan Hendrik" journalOrPublisher="Videnskabelige Meddelelser fra Dansk Naturhistoriske Forening i Kjobenhavn" pageId="0" pageNumber="49935" pagination="7 - 65" refId="B5539857" refString="Stock, Jan Hendrik, 1968. Pycnogonida collected by the Galathea and Anton Bruun in the Indian and Pacific Oceans. Videnskabelige Meddelelser fra Dansk Naturhistoriske Forening i Kjobenhavn 131: 7 - 65" title="Pycnogonida collected by the Galathea and Anton Bruun in the Indian and Pacific Oceans" volume="131" year="1968">Stock 1968</bibRefCitation>
),
<taxonomicName authorityName="Pushkin" authorityYear="1973" class="Pycnogonida" family="Ammotheidae" genus="Cilunculus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Cilunculus kravcovi" order="Pantopoda" pageId="0" pageNumber="49935" phylum="Arthropoda" rank="species" species="kravcovi">
<emphasis italics="true" pageId="0" pageNumber="49935">Cilunculus kravcovi</emphasis>
</taxonomicName>
Pushkin, 1973 which is found in the Crozet Islands (255-309 m) and the Prince Edward Islands (South Indian Ocean) (360-376 m) (
<bibRefCitation author="Pushkin, A. F." journalOrPublisher="Zoologicheskii Zhurnal" pageId="0" pageNumber="49935" pagination="432 - 434" refId="B5481325" refString="Pushkin, A. F., 1973. A new species of the genus Cilunculus (Pantopoda). Zoologicheskii Zhurnal 52: 432 - 434" title="A new species of the genus Cilunculus (Pantopoda)" volume="52" year="1973">Pushkin 1973</bibRefCitation>
,
<bibRefCitation author="Arnaud, F." journalOrPublisher="South African Journal of Antarctic Research" pageId="0" pageNumber="49935" pagination="65 - 71" refId="B5539847" refString="Arnaud, F., Branch, M. L., 1991. The Pycnogonida of subantarctic Marion and Prince Edward Islands: Illustrated keys to the species. South African Journal of Antarctic Research 21 (1): 65 - 71" title="The Pycnogonida of subantarctic Marion and Prince Edward Islands: Illustrated keys to the species" volume="21" year="1991">Arnaud and Branch 1991</bibRefCitation>
) and
<taxonomicName authorityName="Calman" authorityYear="1938" class="Pycnogonida" family="Ammotheidae" genus="Cilunculus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Cilunculus sewelli" order="Pantopoda" pageId="0" pageNumber="49935" phylum="Arthropoda" rank="species" species="sewelli">
<emphasis italics="true" pageId="0" pageNumber="49935">Cilunculus sewelli</emphasis>
</taxonomicName>
Calman, 1938 which was found off Zanzibar (1789 m), Natal (South Africa) (440 m), Kenya (1520 m) and the Mozambique Channel (1628-1600 m) (
<bibRefCitation author="Calman, W. T." journalOrPublisher="Scientific reports / John Murray Expedition 1933 - 34" pageId="0" pageNumber="49935" pagination="147 - 166" refId="B5540564" refString="Calman, W. T., 1938. Pycnogonida. Scientific reports / John Murray Expedition 1933-34 5 (6): 147 - 166" title="Pycnogonida" volume="5" year="1938">Calman 1938</bibRefCitation>
,
<bibRefCitation author="Fage, L." journalOrPublisher="Galathea Reports" pageId="0" pageNumber="49935" pagination="167 - 182" refId="B5540544" refString="Fage, L., 1956. Les Pycnogonides (excl. le genre Nymphon). Galathea Reports 2: 167 - 182" title="Les Pycnogonides (excl. le genre Nymphon)" volume="2" year="1956">Fage 1956</bibRefCitation>
,
<bibRefCitation author="Stock, Jan Hendrik" journalOrPublisher="Videnskabelige Meddelelser fra Dansk Naturhistoriske Forening i Kjobenhavn" pageId="0" pageNumber="49935" pagination="7 - 65" refId="B5539857" refString="Stock, Jan Hendrik, 1968. Pycnogonida collected by the Galathea and Anton Bruun in the Indian and Pacific Oceans. Videnskabelige Meddelelser fra Dansk Naturhistoriske Forening i Kjobenhavn 131: 7 - 65" title="Pycnogonida collected by the Galathea and Anton Bruun in the Indian and Pacific Oceans" volume="131" year="1968">Stock 1968</bibRefCitation>
). The new species was relatively close to
<taxonomicName lsidName="C. kravcovi" pageId="0" pageNumber="49935" rank="species" species="kravcovi">
<emphasis italics="true" pageId="0" pageNumber="49935">C. kravcovi</emphasis>
</taxonomicName>
(Crozet Islands), although they occur several hundred kilometres apart (Fig.
<figureCitation captionStart="Figure 2" captionStartId="F5540625" captionText="Figure 2. The collecting station for station of Cilunculus tricuspis n. sp. and the distribution of four species of Cilunculus ▼ - C. tricuspis n. sp.; ▲ - C. bifidus; ■ - C. kravcovi; ◆ - C. sewelli." figureDoi="10.3897/BDJ.8.e49935.figure2" httpUri="https://binary.pensoft.net/fig/383608" pageId="0" pageNumber="49935">2</figureCitation>
). The three recorded species were differentiated from
<taxonomicName lsidName="C. tricuspis" pageId="0" pageNumber="49935" rank="species" species="tricuspis">
<emphasis italics="true" pageId="0" pageNumber="49935">C. tricuspis</emphasis>
</taxonomicName>
n. sp. based on their distinctive characteristics, such as
<taxonomicName lsidName="C. bifidus" pageId="0" pageNumber="49935" rank="species" species="bifidus">
<emphasis italics="true" pageId="0" pageNumber="49935">C. bifidus</emphasis>
</taxonomicName>
having a tall and bifid ocular tubercle,
<taxonomicName lsidName="C. kravcovi" pageId="0" pageNumber="49935" rank="species" species="kravcovi">
<emphasis italics="true" pageId="0" pageNumber="49935">C. kravcovi</emphasis>
</taxonomicName>
and
<taxonomicName lsidName="C. sewelli" pageId="0" pageNumber="49935" rank="species" species="sewelli">
<emphasis italics="true" pageId="0" pageNumber="49935">C. sewelli</emphasis>
</taxonomicName>
having an acute ocular tubercle and noticeably long setae on legs.
</paragraph>
</subSubSection>
</treatment>
</document>