Two new genera of pinnotherid crabs (Crustacea: Brachyura: Pinnotheroidea) from the Americas and the Western Pacific Author Ng, Peter K. L. Author Ahyong, Shane T. Author Campos, Ernesto text Raffles Bulletin of Zoology 2019 2019-05-30 67 337 351 journal article 10.26107/RBZ-2019-0025 2345-7600 4576169 F42718C4-F0F4-4D75-80C3-2D155B5B8448 Mesotheres barbatus (Desbonne, in Desbonne & Schramm, 1867 ) new combination ( Figs. 7 , 8 ) Pinnotheres barbata Desbonne , in Desbonne & Schramm, 1867: 44 . Pinnotheres barbatus — Rathbun, 1918: 88 , text-fig. 44, pl. 19, figs. 8–11; Rathbun, 1933: 82 ; Schmitt et al., 1973: 39 ; Manning & Holthuis, 1981: 183 ; Gore, 1986: 147 , table 1. Orthotheres barbatus — Sakai, 1969: 244 ; Campos, 1989: 1124 ; Ng et al., 2008: 250 ; Palacios-Theil et al., 2009: 449 ; Palacios Theil et al., 2016: 5 . Material examined. USNM 102159 , 1 female (9.7 × 7.7 mm), zoeas and megalopa, Los Roques Islands , Venezuela , Caribbean Sea, coll. J. Bolaños , 18 December 2000 . Diagnosis. Carapace glabrous, convex in all directions. Margin of carapace front, under surface of carapace, pleon, margins of chelipeds and P2–P5 strongly hirsute (except dactyli). Eyes and front not visible in dorsal view; front distinctly deflexed, defined by convex median projection in frontal view. P1–P5 similar, broad, compressed; P5 not prominently shorter, narrower than other legs. Fig. 8. Mesotheres barbatus (Desbonne, in Desbonne & Schramm, 1867 ) new combination, female (9.7 × 7.7 mm) (USNM 102159), Venezuela. A, outer view of right MXP3; B, inner view of right MXP3. Scales = 0.5 mm. Remarks. The larval development of A. barbatus , described by Bolanõs et al. (2005) , is abbreviated, with only two zoeal stages (usually three or more in other pinnotherines) preceding the megalopa (see also Galindo et al., 2003 ).