Cycloacheous levigatus, Koch, 2021

Koch, Milan, 2021, Cycloachelous levigatus sp. nov., a new swimming crab (Crustacea: Decapoda Portunidae) from the South China Sea, Zootaxa 4970 (2), pp. 325-339 : 327

Cycloacheous levigatus sp. nov.

( Figs. 1B , 2 BEF, 3D–F, 4A, 5B, 8)

Portunus (Amphitrite) gladiator . —de Haan 1833, 65, pl. XVIII (1)

Portunus orbitosinus . — Stephenson & Rees 1967, 31–34, figs. 6a–c, e–g (Form A).

Neptunus (Achelous) orbitospisnis . — Sakai 1939, 396, fig. 8, pl 81 (3).

Portunus orbitospinus . — Sakai 1965, 118, 57 (2)

Portunus (Cycloacheous) orbitosinus .— Sakai 1976, 349, figs. 188a, b; Yamaguchi & Baba 1993, 40–403, fig. 140. Cycloacheous orbitosinus . — Spiridonov et al. 2014, 406, 412.

Figures

FIGURE 1. Overall habitus.A, Cycloacheous orbitosinus (Rathbun, 1911), male 23 mm (MNHN-IU-2010-6278). B, Cycloachelous levigatus sp. nov., male 23.4 mm (MNHN-IU-2014-10097). Scale bars: 5 mm.

FIGURE 2. Comparative morphology, sternal views with details of sexual openings. Cycloacheous orbitosinus (Rathbun, 1911): A, male paratype 33.3 mm (USNM 41084); C, D, female 26.7 mm (MNHN-IU-2010-3290). Cycloachelous levigatus sp. nov.: B, male holotype 23 mm (MNHN-IU-2014-10093); E, F female allotype 15.2 mm (MNHN-IU-2014-10091). Scale bars: A–C, E—5 mm, D, F—1 mm. Photo A, by N. Evans.