<documentid="98C04FDBD8CF45AF6DAC34CA77F51BE1"ID-DOI="10.12651/JSR.2021.10.1.072"ID-ISSN="2713-8615"ID-Zenodo-Dep="13140477"IM.bibliography_approvedBy="felipe"IM.illustrations_approvedBy="felipe"IM.materialsCitations_approvedBy="felipe"IM.metadata_approvedBy="felipe"IM.taxonomicNames_approvedBy="felipe"IM.treatmentCitations_approvedBy="felipe"IM.treatments_approvedBy="felipe"checkinTime="1722403369971"checkinUser="felipe"docAuthor="Lee, Sung-Hyun Kim and Chang-Mok"docDate="2021"docId="038F87FAFFD7656357CB9748FB50FD24"docLanguage="en"docName="JSpeciesRes.10.1.72-77.pdf"docOrigin="Journal of Species Research 10 (1)"docStyle="DocumentStyle:4D398BFF45FF8CA9E08F546BB06AE372.2:JSpeciesRes.2012-.journal_article"docStyleId="4D398BFF45FF8CA9E08F546BB06AE372"docStyleName="JSpeciesRes.2012-.journal_article"docStyleVersion="2"docTitle="Pseudoleucon japonicus Gamo 1964"docType="treatment"docVersion="2"lastPageNumber="76"masterDocId="FFB6FF82FFD6656757659461FF8CFFC5"masterDocTitle="A new record of Pseudoleucon japonicus (Crustacea: Cumacea: Leuconidae) from Korea"masterLastPageNumber="77"masterPageNumber="72"pageNumber="73"updateTime="1722403756310"updateUser="ExternalLinkService"zenodo-license-document="CC-BY-4.0">
<bibRefCitationid="EFB74B1DFFD7656656A59748FDC4FC87"author="Gamo, S."box="[448,584,809,834]"pageId="1"pageNumber="73"pagination="241 - 253"refId="ref3198"refString="Gamo, S. 1964. On three new species of Cumacea from the southern sea of Japan. Crustaceana 7 (4): 241 - 253."type="journal article"year="1964">Gamô, 1964</bibRefCitation>
<bibRefCitationid="EFB74B1DFFD7656656A2970BFD03FC47"author="Gamo, S."box="[455,655,874,898]"pageId="1"pageNumber="73"pagination="241 - 253"refId="ref3198"refString="Gamo, S. 1964. On three new species of Cumacea from the southern sea of Japan. Crustaceana 7 (4): 241 - 253."type="journal article"year="1964">Gamô, 1964: 246</bibRefCitation>
<bibRefCitationid="EFB74B1DFFD76566565B97EBFD81FC67"author="Watling, L."box="[318,525,906,930]"pageId="1"pageNumber="73"pagination="569 - 582"refId="ref3551"refString="Watling, L. 1991. Revision of the cumacean Family Leuconidae. Journal of Crustacean Biology 11 (4): 569 - 582."type="journal article"year="1991">Watling, 1991: 578</bibRefCitation>
<collectingDateid="EFDCE9C4FFD7656656CB906DFDCFFBE1"box="[430,579,1035,1060]"pageId="1"pageNumber="73"value="2008-04-22">22 April 2008</collectingDate>
) slightly longer than 1/3 of body length, 1.7 times as long as its depth, 1.6 times as long as its width; shape nearly rectangular in dorsal view, with 1 pair of short oblique ridges, ridges beginning near end of frontal lobe and merging with dorsal median carina. Antennal notch and antero-lateral angle indistinct. Antero-lateral margin with strong serrations. Pseudorostral lobes (
) 0.6 times as long as carapace and pereon together, with 2 pairs of pleopods; pleonite 5 longest, 0.7 times as long as pleonites 3 and 4 together; pleonite 6 0.5 times as long as pleonite 5, with 3 pairs of simple setae near distal margin. Antenna 1 (
), peduncle 3-articulated; article 1 subequal in length to remaining articles combined, with 1 short plumose and 6 plumose setae; article 2 0.5 times as long as article 1, with 2 simple setae bearing a bundle of hairs laterally, 10 simple setae bearing a bundle of hairs distally; article 3 subequal in length to article 2, with 5 simple setae bearing a bundle of hairs on medial corner. Main flagellum 3-articulated, subequal in length to article 3 of peduncle; article 1 longest, with 1 simple seta bearing a bundle of hairs distally; article 2 0.4 times as long as article 1, with 1 aesthetasc and 2 simple setae bearing a bundle of hairs distally; article 3 small, with 1 aesthetasc and 2 simple setae bearing a bundle of hairs distally. Accessory flagellum not articulated, with 5 simple setae bearing a bundle of hairs distally.
), basis 1.2 times as long as remaining articles combined, with numerus hair-like and 4 plumose setae medially, 4 plumose setae on lateral face, 1 plumose and 3 long plumose setae on lateral conner; ischium short, unarmed; merus 2.6 times as long as ischium, with 2 plumose setae medially, 1 long plumose seta laterodistally; carpus 1.2 times as long as merus, with 3 plumose setae medially; propodus 0.8 times as long as carpus, unarmed; dactylus 0.9 times as long as propodus, with 4 short simple setae on lateral face, 5 simple setae terminally.
), basis 0.9 times as long as remaining articles combined, with 5 plumose setae medially, 4 plumose setae on lateral face, 1 plumose seta and 3 simple setae bearing a bundle of hairs distally; ischium very short, with 1 plumose seta medially; merus 2.9 times as long as ischium, with 1 short simple and 1 plumose setae medially, 2 short simple and 3 long plumose setae laterally; carpus 1.4 times as long as propodus, with 2 short simple setae, 1 complex pedunculate seta, and 4 simple setae bearing a bundle of hairs medially, 4 short simple and 4 long plumose setae laterally, 2 short simple and 3 long plumose setae laterodistally; propodus 0.8 times as long as carpus, with 4 short simple setae and 1 simple seta bearing a bundle of hairs medially, 4 short simple and 3 long plumose setae laterally; dactylus 0.8 times as long as propodus, with 2 short simple and 1 simple setae laterally, 1 short simple and 3 simple setae terminally.
), basis 1.3 times as long as remaining articles combined, with 12 plumose setae and 3 simple setae bearing a bundle of hairs medially, 1 plumose seta on lateral face, 1 short simple and 1 plumose setae laterally; ischium very short, with 1 long plumose seta mediodistally; merus 7.3 times as long as ischium, with 1 simple seta bearing a bundle of hairs mediodistally, 3 simple setae bearing a bundle of hairs laterally, 1 plumose seta distally; carpus 1.4 times as long as merus, with 2 simple setae bearing a bundle of hairs medially, 2 simple setae bearing a bundle of hairs laterally, 1 plumose seta and 2 simple setae bearing a bundle of hairs distally; propodus 0.3 times as long as carpus, with 1 simple seta bearing a bundle of hairs laterodistally; dactylus 2.9 times as long as propodus, with 1 short simple and 1 plumose setae medially, 2 simple setae bearing a bundle of hairs on lateral face, 1 simple seta bearing a bundle of hairs laterally, 1 simple seta and 5 simple setae bearing a bundle of hairs terminally.
<bibRefCitationid="EFB74B1DFFD4656556CF93FCFD95F876"author="Gamo, S."box="[426,537,1949,1971]"pageId="2"pageNumber="74"pagination="241 - 253"refId="ref3198"refString="Gamo, S. 1964. On three new species of Cumacea from the southern sea of Japan. Crustaceana 7 (4): 241 - 253."type="journal article"year="1964">Gamô, 1964</bibRefCitation>
</taxonomicName>
, subadult male, 2.6 mm. A, habitus, lateral view; B, carapace and pereon, dorsal view; C, antenna 1; D, antenna 2; E, maxilliped 3; F, pereopod 1; G, habitus of subadult female, lateral view, 2.7 mm. Scale bars: A, B, G
<bibRefCitationid="EFB74B1DFFD5656456B69277FDC9F9E9"author="Gamo, S."box="[467,581,1558,1580]"pageId="3"pageNumber="75"pagination="241 - 253"refId="ref3198"refString="Gamo, S. 1964. On three new species of Cumacea from the southern sea of Japan. Crustaceana 7 (4): 241 - 253."type="journal article"year="1964">Gamô, 1964</bibRefCitation>
</taxonomicName>
, subadult male, 2.6 mm. A, pereopod 2; B, pereopod 3; C, pereopod 4; D, pereopod 5; E, pleopod 1; F, uropods and last pleonite. Scale bars: A
) basis 1.7 times as long as remaining articles combined, with 10 plumose setae medially, 2 plumose setae on lateral face, 1 plumose and 2 long plumose setae laterodistally, 1 plumose and 1 long plumose setae distally; ischium 0.1 times as long as basis, with 1 plumose seta medially, 1 plumose and 1 annulate setae distally; merus subequal in length to ischium, with 1 annulate seta distally; carpus 1.9 times as long as merus, with 1 simple seta bearing a bundle of hairs laterally, 1 short simple and 3 annulate setae distally; propodus 0.6 times as long as carpus, with 1 annulate seta laterodistally; dactylus 0.3 times as long as propodus, with 2 short simple and 1 annulate setae terminally.
), basis 1.7 times as long as remaining articles combined, with 1 plumose seta medially, 3 plumose setae on lateral face, 1 plumose seta laterally, 1 plumose and 2 long plumose setae distally; ischium 0.1 times as long as basis, with 4 annulate setae distally; merus 1.6 times as long as ischium, with 1 plumose and 1 annulate setae distally; carpus 1.7 times as long as merus, with 1 annulate seta laterally, 1 short simple and 3 annulate setae distally; propodus 0.5 times as long as carpus, unarmed; dactylus 0.2 times as long as propodus, with 2 short simple and 1 annulate setae terminally.
), basis 0.8 times as long as remaining articles combined, with 3 plumose setae mediodistally, 2 plumose setae and 1 simple seta bearing a bundle of hairs laterally; ischium 0.3 times as long as basis, with 3 annulate setae medially; merus 1.9 times as long as ischium, with 1 plumose seta laterally, 1 annulate seta distally; carpus subequal in length to merus, with 1 plumose seta laterally, 4 annulate setae distally; propodus 0.5 times as long as carpus, with 1 annulate seta laterodistally; dactylus 0.2 times as long as propodus, with 1 short simple seta medially, 1 annulate seta terminally.
), peduncle subequal in length to last pleonite, with 1 simple seta and 7 simple setae bearing a bundle of hairs medially, 1 short simple seta laterally. Uropod endopod 2-articulated, 1.4 times as long as peduncle, 0.7 times as long as exopod; article 1 with 4 plumose setae and 1 simple seta with single subterminal setule medially, 1 plumose seta and 1 simple seta bearing a bundle of hairs mediodistally, 1 short simple seta laterally; article 2 0.4 times as long as article 1, with 1 short simple seta and 1 simple seta with single subterminal setule mediodistally, 1 short simple seta laterodistally, 1 long plumose and 1 stout simple setae terminally. Uropod exopod 2-articulat- ed, 1.9 times as long as peduncle; article 1 unarmed, article 2 with 3 plumose setae, 1 broken seta, and 21 simple seta bearing a bundle of hairs.
, excluding uropods. Carapace slightly longer than 1/3 of body length, 1.5 times as long as its depth; shape and sculpture of carapace similar to subadult male. Pereon 0.7 times as long as carapace, shorter than 1/3 of body length; pereopods 4 and 5 without exopod. Pleon 0.6 times as long as carapace and pereon together, without pleopod.
<bibRefCitationid="EFB74B1DFFD26563556E9353FD02F88F"author="Gamo, S."box="[523,654,1842,1866]"pageId="4"pageNumber="76"pagination="241 - 253"refId="ref3198"refString="Gamo, S. 1964. On three new species of Cumacea from the southern sea of Japan. Crustaceana 7 (4): 241 - 253."type="journal article"year="1964">Gamô, 1964</bibRefCitation>
<bibRefCitationid="EFB74B1DFFD2656355509333FD46F8AF"author="Zimmer, C."box="[565,714,1874,1898]"pageId="4"pageNumber="76"pagination="664 - 694"refId="ref3609"refString="Zimmer, C. 1903. Die Cumaceen des Museums fur Naturkunde in Berlin. Zoologische Jahrbucher, Abtheilung fur Systematik, Geographie und Biologie der Thiere: 664 - 694."type="book chapter"year="1903">Zimmer, 1903</bibRefCitation>
</taxonomicName>
by having a pair of short oblique ridges on the carapace. In the original description, only the female of
<bibRefCitationid="EFB74B1DFFD26563566093D2FE1EF80E"author="Gamo, S."box="[261,402,1971,1995]"pageId="4"pageNumber="76"pagination="241 - 253"refId="ref3198"refString="Gamo, S. 1964. On three new species of Cumacea from the southern sea of Japan. Crustaceana 7 (4): 241 - 253."type="journal article"year="1964">Gamô, 1964</bibRefCitation>
). Fortunately, the specimens of both sexes were collected in the present study. There is no doubt that these specimens are
due to the following characters: 1) the carapace has strong serrations on antero-lateral margin and a pair of short oblique ridges on the side surface; 2) the short oblique ridges begin near the end of frontal lobe and merge with dorsal median carina; 3) the antenna 1, pereopod 2 and uropod have a lot of simple setae decorated with a bundle of hairs at the end. Also, the setal
5 and uropod, are almost the same as Gamô̓s specimen. There is, however, a slight dif- ference in the length ratio of the pereopods and uropods, between the collected specimens and the original description (
<bibRefCitationid="EFB74B1DFFD26563543B96C8FC68FD05"author="Gamo, S."box="[862,996,680,705]"pageId="4"pageNumber="76"pagination="241 - 253"refId="ref3198"refString="Gamo, S. 1964. On three new species of Cumacea from the southern sea of Japan. Crustaceana 7 (4): 241 - 253."type="journal article"year="1964">Gamô, 1964</bibRefCitation>
), which is assumed to be due to sexual dimorphism and developmental variation.
