Serenolumnus kasijani ( Serène, 1969 )

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 : 75

Serenolumnus kasijani ( Serène, 1969)

( Fig. 16F)

Material examined. RV Hakuhō Maru KH-72-1 cruise, sta. 29, 1 ovig. $ ( CB 4.2×CL 3.1 mm), NSMT-Cr 30762. — Sta. 32, 2 ƏƏ ( CB 4.8×CL 3.5 mm; 6.6× 5.2 mm), 5 ovig. $$ (4.2× 3.1 mm – 6.4× 4.7 mm), NSMT-Cr 30763.

Remarks. The specimens examined fully agree with the description and figure of Glabropilum- nus kasijani Serène, 1969 , which was designated as the unique representative of Serenolumnus by Galil and Takeda (1988). The carapace ( Fig. 16F) is strongly convex dorsally, and smooth and gla- brous without granules and setae except for sparse, short setae along the frontal and anterolateral margins. The carapace anterolateral margin is strongly arched and cut into four lobes; the first lobe is straight and confluent with the exter- nal orbital angle; the second and third lobes are low and triangularly toothed each with the tip directed obliquely forward along the general contour of the carapace margin as a whole; the last is similar to, but smaller than the preceding lobe. The thick eyestalk and elongate cornea are not fully accommodated in the oblong orbit. Both chelipeds are almost smooth, without distinct granules and hairs, and heavy in both sexes; the outer upper surface of the palm is engraved with a longitudinal furrow along the whole length and the distal half of the outer lower surface with a longitudinal furrow extending the distal part of the immovable finger. The G1 is distinctly of the pilumnid-type as finely illustrated by the original author.

Distribution. East of Sumatra, Indonesia, 12–15 m depth; Sulu Archipelago; South China Sea; Singapore. Otherwise, Garth and Kim (1983) recorded this species from the north of Cebu and the Sulu Archipelago in the Philippines, 43–54 m deep. The bathymetric range is extended down to 78 m in the present study.