Coriollianassa coriolisae (Ngoc-Ho, 2014)

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 : 188

Coriollianassa coriolisae ( Ngoc-Ho, 2014)

Figure 15

Callianassa coriolisae Ngoc-Ho, 2014: 552–554, fig. 3 (type locality, Philippines) .

Coriollianassa coriolisae .— Poore et al., 2019: 93, 137, 142, fig. 2n. — Robles et al., 2020: figs 1, 3, 6, Supplementary tables 1, 2.

Material examined. Philippines. N Sulu Sea , 11° 58' N, 121° 15' E, 320–337 m (MUSORSTOM 3 stn CP119), MNHN IU-2013-18276 (holotype of Callianassa coriolisae , male, 12 mm). Casiguran Sound, 16° 5' N, 121° 57' E, 98–107 m ( MNHN AURORA stn 2654), NMCR 49805 ( ULLZ 10135 *), (male without major cheliped, 6.4 mm). Off Dipaculao, 15° 57' N, 121° 47' E, 278– 271 m (AURORA stn CC2733 ), NHMW 26457 (male, 6.9 mm, figured by P.C. Dworschak, pers. comm.) . Vanuatu, S of Espiritu Santo , 15° 43' S, 167° 03' E, 441 m ( SANTO Casier 3), MNHN IU-2013-7138 * (female, 6.5 mm, without chelipeds) .

Diagnosis. Rostrum scarcely carinate dorsally, with ventral keel-like carina. Maxilliped 3 merus with broadly rounded mesiodistal angle. Telson elongate-trapezoidal, 1.4 times as long as wide.

Distribution. Western Coral Triangle (type locality: N Sulu Sea, 320–337 m), Tropical Southwestern Pacific; 98– 441 m.

Remarks. Callianassa coriolisae was well illustrated by Ngoc-Ho (2014). Here, the carapace of the holotype is illustrated in dorsal and lateral views along with detail of the front and antennae. Ngoc-Ho separated the new species from C. sibogae on the absence of a rostral carina, more oblique distomesial margin of the maxillipedal merus, and shape of the uropod. The fragmentary material from the Philippines, illustrated by Peter C. Dworschak (pers. comm.), and from Vanuatu, illustrated here (fig. 15c, d), are included with some hesitation in C. coriolisae . All specimens are no more than half the size of the holotype of C. coriolisae . One specimen from each locality was sequenced but there was zero divergence between the two 12S sequences. All possess a maxilliped 3 merus with an oblique distomesial margin and a rostrum barely carinate above.

Figures

Figure 15. Coriollianassa coriolisae (Ngoc-Ho, 2014). Philippines, MNHN IU-2013-18276, holotype male, 12 mm: a, b, anterior carapace, eyestalk, antennular, antennal peduncles (dorsal, lateral views). NMCR 49805 (ULLZ 10135), male without major cheliped, 6.4 mm (from sketches supplied by P.C. Dworschak: c, eyestalk, antennular, antennal peduncles, carapace, pleomeres 1, 2; d, anterior carapace, eyestalk, antennal peduncle, Vanuatu, MNHN IU-2013-7138, female, 6.5 mm: e, carapace, pleomeres 1, 2; f, g, anterior carapace, eyestalk, antennular, antennal peduncles (dorsal, lateral views); h, pleomere 6, right uropod; i, maxilliped 3. Scale bars = 1 mm.