Calliaxina, Nguyen Ngoc-Ho, 2003

Poore, Gary, 2021, Indo-West Pacific and Australian species of Eucalliacidae with descriptions of four new species (Crustacea: Axiidea), Memoirs of Museum Victoria 80, pp. 1-41 : 3-5

Calliaxina Ngoc-Ho, 2003

Calliaxina Ngoc-Ho, 2003: 493–494 .— Sakai, 2011: 497 (part).—

Poore et al., 2019: 126–127.

Remarks. Calliaxina differs from Eucalliaxiopsis in lacking a transverse ridge on the telson, lacking differentiation between male and female major chelipeds, and always possessing an exopod on maxilliped 3, sometimes vestigial ( Poore et al., 2019; Robles et al., 2020).

Calliaxina includes the type species, C. punica (de Saint Laurent and Manning, 1982) from the western Mediterranean plus four species from the Indo-West Pacific. Separation of the species is difficult because characters defining each have historically been incompletely documented. Juveniles of all species tend to have larger eyes, more acute rostrums and similar telsons, making differentiation on the basis of these characters impossible. Adult males of four species are known; juvenile males of one of these and of the fifth species have presumably immature pleopods 1 (see Poore et al. [2019] and discussions below under C. bulimba and C. novaebritanniae ). Liu and Liang’s (2016) key to species included one species here placed in Eucalliaxiopsis and relied on the shape of the rostrum and telson, both size-dependent features.