Cryptocoeloma haswelli Rathbun, 1923

Manikandan, K, Megalaa, N, Valliappan, Subramanian, Nandini, K, Rani, Lourdu V, Dakshinamurthi, Senthil & Nagappan, Nagappan, 2022, Crabs (Crustacea, Decapoda) from the Seas of East and Southeast Asia Collected by the RV Hakuhō Maru (KH- 72 - 1 Cruise) 3. Sahul Shelf, Bulletin of the National Museum of Nature and Science. Series A, Zoology 48 (2), pp. 35-83 : 69

Cryptocoeloma haswelli Rathbun, 1923

( Fig. 16D–E)

Material examined. RV Hakuhō Maru KH-72-1 cruise, sta. 29, 1Ə ( CB 8.9×CL 7.0 mm), NSMT-Cr 30746; 1 Ə (7.0×5.0 mm), NSMT-Cr 30747.

Remarks. The confused taxonomic history of this characteristic species was fully clarified by Ng (1989) who determined its systematic position to be in the family Pilumnidae , despite its unusual appearance. As depicted by Haswell (1882: pl. 1 fig. 4, as Pilumnus fimbriatus ), Fulton and Grant (1906: pl. 4 fig. 5, as Cryptocoe- loma fimbriatus ), Ng (1989: figs. 1–3) and in the present paper ( Fig. 16D–E), the frontorbital and anterolateral margins of the carapace are fringed with long, thick shaggy setae; in dorsal view ( Fig. 16D), the details of the frontal and anterolateral margins are completely obscured by the setal fringe; in ventral view ( Fig. 16E), the strongly flexed frontal margin is evidently divided into two lobes, and the carapace anterolateral margin is divided into three low lobes by two small interruptions.

Distribution. Queensland to Western Australia; Java. According to Ng (1989), C. haswelli appears to be a tropical littoral coral reef species. Otherwise, the habitat and depth records in the literature are as follows: coral reef ( Haswell, 1882); 7–9 m at Thursday Island ( Miers, 1884); 3 m at Denham, the administrative town for the Shire of Shark Bay ( Balss, 1933); under rocks and corals at Linman Island ( Ng, 1989). The specimen examined was obtained from a depth of 49 to 52 m.