Coriollianassa sibogae (De Man, 1905 )

Poore, Gary C. B., 2023, New records, one new genus and 21 new species of Callianassidae (Crustacea, Axiidea) from the Indo-West Pacific, Memoirs of Museum Victoria 82, pp. 167-255 : 196-197

Coriollianassa sibogae (De Man, 1905)

Figure 21

Callianassa sibogae De Man, 1905: 613–614 .— Ngoc-Ho, 1994: 54–56, fig. 3 (North West Shelf, Australia).

Callianassa (Cheramus) sibogae .— De Man, 1928a: 124–127, pl. 11 fig. 17.

Cheramus sibogae .— Ngoc-Ho, 2005: 77, fig. 15 ( French Polynesia).

Trypaea sibogae .— Sakai, 2011: 408–409.

Coriollianassa sibogae .— Poore et al., 2019: 93, 140, 142.

Material examined. Australia. WA, North West Shelf , between Port Hedland and Dampier, 18° 41' S, 118° 39' E, 134 m ( MV stn NWA21 ), NMV J22662 (1 male, 3.8 mm; female, 5.4 mm); 18° 45' S, 118° 24' E, 142 m ( MV stn NWA23 ), MNHN Th1248 (female, 4.0 mm) (det. Ngoc-Ho, 1994) . French Polynesia. Raiatea Is., 16° 43.17' S, 151° 25.67' E, 309 m, MNHN Th1434 (female, 7.5 mm) .

Diagnosis. Rostrum sharply carinate dorsally, concave on each side, bulbous ventrally. Maxilliped 3 merus distally truncate, with obtuse mesiodistal angle. Telson trapezoidal, 1.1 times as long as wide.

Distribution. Western Coral Triangle (type locality: Bali Sea, 7° 46' S, 114° 30.5' E, 330 m – Siboga stn 5), Northwest Australian shelf; 134– 330 m.

Remarks. De Man (1905) based Callianassa sibogae on a single specimen of cl. 6.8 mm without chelipeds and pereopods 3 and 4 from 330 m in the Bali Sea. He described the rostrum as “lamellar, strongly compressed, with sharp upper edge, acuminate”, tergum of pleomere 1 as “saddle-shaped, carrying on the middle of its wider posterior part a compressed, low tubercle, appearing here thus carinate” and the merus of maxilliped 3 as “quadrangular, shorter than the ischium, somewhat widening anteriorly”. The two specimens from the North West Shelf of Australia determined by Ngoc-Ho (1994) are consistent with this description and De Man’s (1928a) figures. Coriollianassa sibogae is notable for the anteriorly directed rostrum being sharply carinate above and bulbous below and the almost right-angled distomesial margin of maxilliped 3.

The specimen from French Polynesia attributed to this species by Ngoc-Ho (2005) most probably belongs to this species, although critical elements (maxilliped 3, major cheliped) are missing.

Figures

Figure 21. Coriollianassa sibogae (De Man, 1905). Australia, North West Shelf, NMV J22662 (female, 5.4 mm). a, carapace, pleomeres 1, 2; b, c, anterior carapace, eyestalk, antennular, antennal peduncles (dorsal, lateral views); d, pleomere 6, right uropod. Scale bars = 1 mm.