Coriollianassa Poore, Dworschak, Robles, Mantelatto and Felder, 2019

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 : 187-188

Coriollianassa Poore, Dworschak, Robles, Mantelatto and Felder, 2019

Coriollianassa Poore et al., 2019: 93 .— Robles et al., 2020: figs 1,

3, 6.— Poore and Ahyong, 2023: 212.

Remarks. The genus is characterised by the sharp anteriorly directed rostrum with a dorsal carina. The antennal peduncle is longer than the antennular peduncle and the scaphocerite is usually bifid. The carpus of the larger cheliped has an unusual “neck” such that the merus does not overlap the carpus at right angles as in many callianassids. The lower margin of merus of the cheliped has an oblique tooth with a minute tooth more proximal. The eyestalk is well domed above the cornea. Contrary to Poore et al.’s (2019) diagnosis, the male pleopod 2 is a small tubercle; pleopod 1 is a simple ramus.

The molecular phylogeny ( Robles et al., 2020) recognised four clades, some with little support: (1) Coriollianassa MOZ-33, five individuals from the Mozambique Channel; (2) one individual from Vanuatu; (3) a specimen identified as C. coriolisae ( Ngoc-Ho, 2014) from its type locality, the Philippines; and (4) C. MOZ-31, another specimen from the Mozambique Channel. These are treated here as C. coriolisae and two new species. The identity of additional material from northwestern Australia previously identified as C. sibogae (De Man, 1905) was confirmed but other material from this region was found to belong to a third new species. Differences between species can be found in the shapes of the eyestalks, rostrum, maxilliped 3, pleomere 1 and in proportions of pleomere 6, telson and the uropodal rami.

The identity of another from French Polynesia identified as C. sibogae remains in doubt.