Calliaxiopsis madagassa Sakai and Türkay, 2014: 193 Calliaxina thomassini Ngoc-Ho, 2014: 549 Calliaxina madagassa Poore and Dworschak, 2017: 120 Indo-West Pacific and Australian species of Eucalliacidae with descriptions of four new species (Crustacea: Axiidea) Poore, Gary Memoirs of Museum Victoria 2021 80 1 41 BSD28 (Sakai and Turkay, 2014) Sakai and Turkay 2014 [147,713,489,512] Malacostraca Eucalliacidae Eucalliaxiopsis CoL,GBIF Animalia Decapoda 27 28 Arthropoda species madagassa   Figure 19      Calliaxiopsis madagassa Sakai and Türkay, 2014: 193, fig. 13.  Calliaxina thomassini  Ngoc-Ho, 2014: 549, fig. 2.    Calliaxina madagassa.—  Poore and Dworschak, 2017: 120, fig. 1.   Material examined.  Madagascar. Nosy Bé, W of Hell-Ville, 13.41562° S, 48.24648° E(stn MGNW-50), UF 14090(ovigerous female, 5.8 mm). Toliara(as Tuléar), Thomassin stn 676, MNHN- IU-2016-8085 (ovigerous female, 5.8 mm).  Diagnosis.Eyestalk about twice as long as wide. Antennule peduncle reaching to midpoint of antenna peduncle article 5. Maxilliped 3 exopod present. Cheliped carpi distolateral margin square at lower angle, propodi lateral face without longitudinal ridge, upper mesial face with row of clusters of long setae. Malepleopod 1 article 1 without distal setae, article 2 parallel-sided, apically rounded, with marginal setae, without appendix interna. Female pleopod 2, appendix interna absent. Uropod endopod ovate. Telson without transverse row of spiniform setae.  Distribution. Madagascar.  Remarks. Poore and Dworschak (2017)discussed the synonymy and priority of the species names before  Calliaxinawas divided into two by Poore et al. (2019). The species is widespread in Madagascar( Ngoc-Ho, 2014) and is recognised by rounded posterolateral corners and convex posterior margin of the telson, the continuous dense row of setae on the lateral margin of the fixed finger of the minor cheliped, and the presence (usually) of two or three tubercles at the midpoint of the lower margin of the cheliped merus. The ovigerous female differs from that of the male figured by Ngoc-Ho (2014)in having a slightly narrower uropodal exopod and in having the chelipeds subequal – they are unequal in males of most species of this genus. UF Madagascar -13.41562 Nosy Be 1 48.24648 27 28 UF 14090 1 Toliara