Poecilasma obliqua ( Hoek, 1907 )

Chan, Benny K. K. & Hayashi, Ryota, 2012, Epibiotic barnacles (Crustacea: Cirripedia: Thoracica) collected by the Kumejima 2009 Expedition, with descriptions of two new species *, Zootaxa 3367, pp. 21-48 : 39

publication ID	https://doi.org/ 10.5281/zenodo.281652
DOI	https://doi.org/10.5281/zenodo.3506950
persistent identifier	https://treatment.plazi.org/id/03FC87D4-FFCD-8A08-C7D7-213753E0FA54
treatment provided by	Plazi
scientific name	Poecilasma obliqua ( Hoek, 1907 )
status

Treatment

Poecilasma obliqua ( Hoek, 1907)

( Figs. 2 View FIGURE 2 E, 12, 13)

Poecilasma oblequum Hoek, 1907: 12 , pl. 1, figs. 11–22.— Liu & Ren 1985: 231, fig 27: pl. 6: 17. Poecilasma (Trilasmis) oblequum .— Krüger, 1911: 39.

Temnaspis obliqua .— Broch, 1931: 128.

Trilasmis (Poecilasma) oblique .— Hiro 1937b: 408, figs. 8–9.— Hiro 1937a: 83, fig. 68.

Material examined. RUMF-ZC-1560, one specimen (13.2 mm) on Chaceon granulatus (Sakai) (Brachyura, Geryionidae RUMF-ZC-1093); collected by a bait trap off Kumejima, 26°17.433´N 126°43.142´E – 26°17.498´N 126°42.487´E, 19–20 Nov. 2009, depth 457– 547 m.

Diagnosis. Capitulum globular, white, plates smooth. Tergum very narrow, occludent margin very short.

Description. Capitulum globular, white; 5 capitular plates - 1 carina, paired tergum and scutum. Tergum triangular, very narrow; occludent margin shortest ( Fig. 2 View FIGURE 2 E). Scutum D-shaped; tergal and carinal margins convex; occludent margin straight, vertical; basal margin perpendicular to occludent margin ( Fig. 2 View FIGURE 2 E). Peduncle yellow, with concentric rings ( Fig. 2 View FIGURE 2 E).

Maxilla globular; all margins setose; setae simple. Maxillule strongly notched; two large setae above notch, one large setae in notch; region below notch protuberant; short setae below ( Fig. 12 View FIGURE 12 A, B). Mandible with 4 teeth, first separated from remainder; cutting margin smooth; inferior angle acute ( Fig. 12 View FIGURE 12 C, D). Mandibular palps subtriangular, tapering distally ( Fig. 12 View FIGURE 12 E); serrulate setae distally ( Fig. 12 View FIGURE 12 F) and on exterior margin. Labrum concave with numerous (>100) small, sharp teeth ( Fig. 12 View FIGURE 12 G, H).

Cirrus I with 1 oval shaped filamentary appendage at base ( Fig. 13 View FIGURE 13 B); anterior and posterior rami 8- and 6-segmented, respectively ( Fig. 13 View FIGURE 13 A); large, robust, short simple setae at tip of both rami and on segment junction of greater curvature of ramus ( Fig. 13 View FIGURE 13 E); serrulate setae along mid and proximal region of lesser curvature of ramus ( Fig. 13 View FIGURE 13 C, D). Setal type of cirri II–VI simple. Cirrus II, anterior and posterior rami 10- and 17-segmented, respectively. Cirri III and IV with anterior and posterior rami 13- and 14-segmented, respectively. Cirrus V with anterior and posterior rami 12- and 13-segmented, respectively. Cirrus VI with anterior and posterior rami 14-segmented; intermediate segment of lesser curvature of posterior ramus with 7 to 10 serrulate setae at junction of each segment ( Fig. 13 View FIGURE 13 F). Caudal appendage short, length similar to height of proximal segment of pedicel of cirrus VI; serrulate setae distally ( Fig. 13 View FIGURE 13 G). Penis setose, large bundle of setae distally ( Fig. 13 View FIGURE 13 H).

Distribution. Pacific Ocean, South China Sea.

Remarks. This species has been recorded previously in Japanese waters ( Hiro 1937b).

Kingdom	Animalia
Phylum	Arthropoda
Class	Maxillopoda
Order	Pedunculata
Family	Poecilasmatidae
Genus	Poecilasma