Circulium papuomalesiacum ( Nobili, 1899 ) Naruse & Ng, 2020

Naruse, Tohru & Ng, Peter K. L., 2020, Revision of the sesarmid crab genera Labuanium Serène and Soh, 1970, Scandarma Schubart, Liu and Cuesta, 2003 and Namlacium Serène and Soh, 1970 (Crustacea: Decapoda: Brachyura: Sesarmidae), with descriptions of four new genera and two new species, Journal of Natural History (J. Nat. Hist.) 54 (7 - 8), pp. 445-532 : 461-462

Circulium papuomalesiacum ( Nobili, 1899) , comb. nov.

Sesarma (Episesarma) rotundata papuo-malesiaca Nobili, 1899, p. 268 [type locality: Western New Guinea].

Sesarma (Sesarma) rotundata papuo-malesiaca: Nobili 1900, p. 510 (part).

Sesarma (Sesarma) rotundata: Tesch 1917, p. 193 (part); Sendler 1923, p. 33.

Labuanium rotundatum: Ng et al. 2008a, p. 221 .

Labuanium papuomalesiacum: Ng and Davie 2011, p. 36 , figs 2B, 3B, 4B, 5C, 6B, 9, 10H–K; Ng 2012, p. 266.

Material examined

ZRC 2013.1794 , 1 ovig.female,25.4 × 25.5 mm, Kri Island ,Raja Ampat, north-western Irian Jaya, West Papua, Indonesia, coll. H.H. Tan, December 2010; SMF 1971.18.5.53, 4 males (38.0 × 37.4 mm, 32.5 × 32.1 mm, 33.0 × 32.4 mm, 18.5 × 18.7 mm), 2 females (31.9 × 31.9 mm, 31.2 × 29.0 mm, 21.0 × 21.0 mm), Yap, Caroline Islands, coll. E. Wolff; SMF 1972.18.5.53, 3 males (28.8 × 29.0 mm, 26.3 × 26.1 mm, 24.6 × 24.5 mm), 1 female (30.5 × 30.3 mm), Bertrand Island , Papua-New Guinea, coll. E. Wolff; USNM 1150441 , 1 male (40.9 × 38.8 mm), Teurai Bay , Vanikoro Island,St.Cruz Group, Solomon Islands,coll. 6May 1933. Diagnosis

Two pairs of postfrontal lobes present,lateral lobes exceeding mesial lobes anteriorly, anterior edge of lobes far from frontal margin in dorsal view. Epistome posterior margin with 3 low lobes, lateral lobes terminally directed anteroventrally, median lobe terminally directed anteriorly. Chela outer surface covered with closely arranged small granules; upper surface with 1 complete longitudinally traversing row of small granules. G1 stout, relatively long, straight proximally, distally bent about 60° against main axis; distal beak-like and corneous process relatively short, narrow. Sternal vulval cover covering almost entire vulva, except for mesial hole, sternal vulval cover produced anteroventrally as trigonal pyramid projection.

Colouration

Live colouration not known.

Distribution

New Guinea: Kri Island, Raja Ampat, north-western Irian Jaya, West Papua, Indonesia (present study); Andai and Geelving Bay (= present-day Cenderawasih Bay) (Irian Jaya, Western New Guinea, Indonesia) ( Nobili 1899) [type locality]; Bertrand Island ( Sendler 1923). Micronesia: Yap Island, West Caroline Islands ( Sendler 1923). South Pacific: Vanikoro Island, St. Cruz Group, Solomon Islands ( Ng and Davie 2011).

Ecological note

An ovigerous female from Kri Island, Raja Ampat, was collected from a walkway to a jetty during the morning (Tan Heok Hui, personal communication).