New species of Pycnogonum (Pycnogonida: Pycnogonidae) from Green Island Taiwan, with an additional note on the holotype of P. spatium Author Lee, Damin Author Kim, Won text Zootaxa 2020 2020-03-10 4750 1 122 130 journal article 10.11646/zootaxa.4750.1.6 7c160556-e0e1-4fd6-85e1-1f6fa0ab87d7 1175-5326 3702903 575B1970-C7B5-4688-9B41-99F046AFD3F1 Pycnogonum spatium Takahashi et al. 2007 Figures 3 C–D, 5A–F Pycnogonum spatium Takahashi et al ., 2007: 73–75 , fig. 5 Material examined. Holotype , ICHUM3172 , Southeast of Amami Island , Kagoshima , Japan , 28°09.20’N , 129°31.50’E , 332–334 m , beam trawl, Y. Takahashi , 25 May 2004 . FIGURE 5. Pycnogonum spatium , holotype. A, trunk, dorsal view; B, trunk, lateral view; C, trunk, anterodorsal view; D, third leg, long spine on femur broken; E, fourth leg, arrow indicating gonopore; F, second leg, arrow indicating coxal pellicula. Scale bars: 1 mm (A–B); 0.5 mm (C–D); 0.1 mm (E–F). Remarks. Although Takahashi et al . (2007) described P. spatium as having granular integument, the body integument being pitted ( Fig. 3C ), and only the dorsal surface of legs being granulated and pitted ( Fig. 3D ). The proboscis length was recorded as 0.47 mm , while it is actually 0.89 mm ( Fig. 5B ). Takahashi et al . (2007) determined the P. spatium holotype to be a female based on gonopores being on the dorsal surface of coxa 2 of all legs ( Fig. 5F ), however the present observation reveals that there is a gonopore on the ventrodistal surface of coxa 2 on each fourth leg ( Fig. 5E ), which shows the trait of a male. In this case, we can suggest two possibilities, the first being that the specimen is a hermaphrodite and secondly the female gonopores were misdiagnosed and represent coxal pelliculae ( vide Staples, 2007 ), in which case the specimen is a male belonging to the subgenus Nulloviger . To solve this problem, we need additional collection of specimens and research to distinguish the coxal pellicula from the gonopore.