Oncinopus angustifrons Takeda and Miyake, 1969

Arzivian, Arteen, Alrubaie, Ahmad, Yang, Jessica, Lin, Huiyu, Zhang, Eva & Leong, Rupert, 2022, Crabs (Crustacea, Decapoda) from the Seas of East and Southeast Asia Collected by the RV Hakuhō Maru (KH- 72 - 1 Cruise) 4. South China Sea, Bulletin of the National Museum of Nature and Science. Series A, Zoology 48 (4), pp. 147-191 : 155

Oncinopus angustifrons Takeda and Miyake, 1969

( Fig. 3B )

Material examined. RV Hakuhō Maru KH-72-1 cruise, sta. 48, 1Ə (CB 3.4×PCL 4.3 mm), 1 8 (4.5×6.0 mm), NSMT-Cr 30909.

Remarks. In the genus Oncinopus , this species is unique in having the combination of the short, triangular, anterolaterally directed rostral lobes separated by a V-shaped hiatus, the interorbital region concealing the basal part of the unretracted eyestalk, the male G1 being strongly widened subapically, and the female gonopore on a weak elevation and opening more posteriorly than medially. Both male and female specimens in the present collection fully agree with the description by Takeda and Miyake (1969a) and a recent diagnosis given by Davie (2011).

Distribution. Ogasawara Islands ( Takeda and Miyake, 1969a; Takeda, 1973a; Takeda and Kurata, 1976), the East China Sea ( Takeda and Miyake, 1969a), the Philippines and Indonesia ( Griffin and Tranter, 1986), and Western Australia ( Davie, 2011); 36–200 m depth.

Figures

Fig. 3. A: Dorhynchus rostratus (Sakai), 8 (NSMT-Cr 30908; CB 6.6×PCL 8.5mm) from sta. 54. B: Oncino- pus angustifrons Takeda and Miyake, Ə (NSMT-Cr 30909; CB 3.4×PCL 4.3mm) from sta. 48. C–E: Oxypleurodon sphaenocarcinoides (Rathbun), ovig.8 (NSMT-Cr 30913; CB 7.8×PCL 12.7mm) (C–D) from sta. 54; 8(NSMT-Cr 30914; 5.0×8.3mm) (E) from sta. 54.