Poecilasma obliqua Hoek, 1907

Zhibin, Gan & Xinzheng, Li, 2019, Report on four deep-water barnacles (Cirripedia, Thoracica) from the north west Pacific, with remarks on Trianguloscalpellum regium (Wyville-Thomson, 1873), Zootaxa 4565 (2), pp. 201-212 : 209-210

Poecilasma obliqua Hoek, 1907

Figures 8, 9

Poecilasma obliqua Hoek, 1907: 12 , pl. 1 figs 11–22.— Liu & Ren 2007: 149, fig. 53.— Chan & Hayashi 2012: 39 , figs 2E, 12, 13.— Jones & Hosie 2016: 246.

Material examined. NHS-SY-075-12-02, 3 specimens (CL 2.0– 7.8 mm, CW 1.7–6.8 mm, PL 0.8–3.1 mm), Station SY075, Xisha mud volcano, South China Sea, depth 500–810 m, collected by the second author (XLi) with manned submersible Shenhaiyongshi, from onboard R/V Tansuoyihao, 20 May 2018.

FIGURE. 8 Poecilasma obliqua Hoek, 1907 . A, B, lateral view of specimen (tergum lost); C, lateral view of carina; D, lateral view of soft body; E, cirrus I; F, cirrus VI; G, caudal appendage.

Distribution. Western Pacific, mainly recorded from Japan, South China sea, Malay Archipelago and Indonesia.

Remarks. The present specimens (Figs 8A–G, 9A–E) agrees well with the original description of Hoek (1907) and additional descriptions of Chan & Hayashi (2012). They were also collected from the clawed lobster, Metanephrops neptunus ( Bruce, 1965) , but differ from P. litum in that the present specimens were only attached to the maxilliped of M. neptunus . The similarities of nucleotide sequences of the genes COI from the present specimen is more than 99% comparing with that provided by Lin et al. (2015) (genbank number: MH973612 and KF484233 , respectively).

FIGURE. 9 Poecilasma obliqua Hoek, 1907 . A, mouthparts; B, mandibular palp; C, mandible; D, maxillule; E, maxilla.