Neaxius trondlei, Ngoc-Ho, 2005

Poore, Gary C. B. & Dworschak, Peter C., 2018, The Indo-West Pacific species of Neaxiopsis and Neaxius (Crustacea: Axiidea: Strahlaxiidae), Memoirs of Museum Victoria (Mem. Mus. Vic.) 77, pp. 15-28 : 24

publication ID	https://doi.org/ 10.24199/j.mmv.2018.77.02
publication LSID	urn:lsid:zoobank.org:pub:9CAD42D5-099D-4BA9-9CFF-E377A8D422CA
DOI	https://doi.org/10.5281/zenodo.8065409
persistent identifier	https://treatment.plazi.org/id/03D687F6-A922-5922-A22A-224FD497AE6A
treatment provided by	Felipe
scientific name	Neaxius trondlei
status

Treatment

Neaxius trondlei View in CoL Ngoc-Ho, 2005

Neaxius trondlei View in CoL Ngoc-Ho, 2005: 59–63 View Cited Treatment , figs 6, 7.

Material examined. French Polynesia, Marquesas Is, Ua Huka, Hane Bay (MUSORSTOM 9 stn 19), MNHN Th 1419 (holotype male, 29 mm), MNHN Th1427 (paratypes: male, 30 mm; female, 21 mm). W of Haamamao Bay, MNHN Th1428 (paratype female, 13.5 mm) .

Diagnosis. Carapace supra-antennal margin without anteriorly directed spine; anterolateral margin with 3 or 4 spines, dorsalmost anterolaterally directed; branchiostegite anterior margin unknown; cervical groove with 2 or 3 spines along posterior margin. Telson 1.5 times as wide as long; tapering strongly from widest point to posterior margin, posterior margin about 0.6 greatest width; anterior transverse ridge straight, curving laterally but not reaching lateral margin at its widest point; posterior transverse ridge situated at half distance between anterior ridge and posterior margin; posterolateral margin without tubercles; posterior face concave, with well-defined third transverse ridge, without pair of sublateral longitudinal ridges subtended from ends of second transverse ridge. Antenna article 2 with 1 or 2 upper-mesial spines, without lateral spines; scaphocerite with 1 mesial sharp spine, 5 sharp ventral spines; article 4 lower margin without spines. Cheliped merus, lower margin with 3 or 4 spines, lateral face without row of spines. Pereopod 2 merus, lower margin without spines. Pereopod 3 merus, lower margin without spines.

Remarks. Neaxius trondlei is distinguished by the unique combination of no spines on the lateral margin of the second article of the antenna and no spines on the lateral face of the cheliped or on the lower margins of pereopods 2 and 3. The species and N. capricornicus both occur in French Polynesia but c. 1400 km apart. They can be differentiated by the presence of spines along the cervical groove and spines on article 2 of the antenna.