Crabs (Crustacea, Decapoda) from the Seas of East and Southeast Asia Collected by the RV Hakuhō Maru (KH- 72 - 1 Cruise) 3. Sahul Shelf Author Manikandan, K Author Megalaa, N Author Valliappan, Subramanian Author Nandini, K Author Rani, Lourdu V Author Dakshinamurthi, Senthil Author Nagappan, Nagappan text Bulletin of the National Museum of Nature and Science. Series A, Zoology 2022 2022-05-20 48 2 35 83 http://dx.doi.org/10.4103/jpbs.jpbs_806_23 journal article 303514 10.50826/bnmnszool.48.2_35 ae1af4e1-c35d-41db-99cc-8e05c3e3f510 2434-091X 13824279 Thalamita sima H. Milne Edwards, 1834 ( Fig. 14D–F ) Material examined . RV Hakuhō Maru KH-72-1 cruise, sta. 30, 1 Ə( CB 20.2 mm including lateral teeth×CL 14.0 mm), NSMT-Cr 30738. Remarks. Thalamita sima is best characterized by the two-lobed front (this report: fig. 14E; Shen, 1934 : fig. 17; Sakai, 1939 : pl. 51 fig. 3; Barnard, 1950 : fig. 33b; Stephenson and Hudson, 1957: pl. 5 fig. 2; Sakai, 1965 : pl. 64 fig. 1; Sakai, 1976 : pl. 130 fig. 3; Wee and Ng, 1995 : fig. 59A), the pilose carapace surface (this report: fig. 14D, F) and the squamiform sculpture of the palm lower surface (this report: fig. 14E; Montgomery, 1931: pl. 29 fig. 2; Shen, 1934 : fig. 18a). Of the five anterolateral teeth of the carapace, the fourth is slightly smaller than the others as seen in Fig. 14D of this report. The basal antennal article is armed with a low, smooth, curved crest finely granulated along the margin. Stephensen (1945 : fig. 27E), Stephenson and Hudson (1957: fig. 3C), Crosnier (1962 : fig. 181), Dai and Yang (1981 : fig. 138-1), Wee and Ng (1995 : fig. 59D– F) and Apel and Spiridonov (1998 : fig. 94) gave fine figures of the G1 with the flared tip, which is close to those of such species as Th. sexlobata Miers, 1886 and Th. picta Stimpson, 1858 , in having the four-lobed front. Distribution. Widely distributed in the Indo-West Pacific, from Hawaii and Japan to southwards to New Caledonia and Australia , and westwards to South Africa and the Red Sea. In Japan , this species is not uncommon on rocky shores down to 15 m depth, but otherwise there are some records from deeper waters down to 50 m . The bathymetric range is extended down to 115 m in this report.