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 Pseudolambrus bidentatus ( Flipse, 1930 ) ( Fig. 13A–B ) Material examined . RV Hakuhō Maru KH-72-1 cruise, sta. 29, 1Ə ( CB 24.5 mm including branchial posterolateral spines×CL 23.9 mm in median line), NSMT-Cr 30729. Remarks . The male of Pseudolambrus bidentatus examined ( Fig. 12A–B ) agrees completely with the original description and figure, being characterized by a mesogastric tubercle rather directed posteriorly, a sharp keel from a small tubercle at the median part of the branchial region toward the posterolateral outgrowth, the hepatic and branchial margins fringed respectively with three and seven thin lobes, and a thin lobe of remarkable size at the basal part of the outer margin of each palm. As noted by Takeda and Komatsu (2015) , this species is in the group of Pseudolambrus having the rather depressed and triangular carapace armed with a strong mesogastric tubercle; P. harpax ( Adams and White, 1848 ) , P. confragosus ( Calman, 1900 ) , P. bispinosus ( Rathbun, 1902 ) , P. lobatus ( Flipse, 1930 ) , P. bicornis ( Flipse, 1930 ) , and P. incisus Takeda and Komatsu, 2015 . This species is readily differentiated from them by the characters mentioned above. Fig. 12.ɹ Charybdis (Charybdis) rosaea (Hombron and Jacquinot) . A: Ə(NSMT-Cr 30774; CB 32.4mm including lateral teeth×CL 26.6 mm in median line)from sta. 32. B: Ə(NSMT-Cr 30775; 34.8×37.9mm)from sta. 32. C: Ə(NSMT-Cr 30776; 34.8×27.7mm)from sta. 32. Pseudolambrus bidentatus was originally described as Lambrus ( Pseudolambrus ) confragosus var. bidentatus based on two females , one of which is ovigerous, from the Moluccas , Indonesia ; Ng et al. (2008) raised the taxon to full species status. Distribution. Moluccas , Indonesia , and now from northern Australia ; 32–52 m depth.