Johngarthia Türkay, 1970

Perger, Robert, Vargas, Rita & Wall, Adam, 2011, Johngarthia cocoensis, a new species of Gecarcinidae MacLeay, 1838 (Crustacea, Decapoda, Brachyura) from Cocos Island, Costa Rica, Zootaxa 2911, pp. 57-68 : 58

Johngarthia Türkay, 1970

Diagnosis (modified from Türkay 1970). Outer dorsal and ventral orbital border converge with carapace anterolateral border at height of widest orbital width when seen in frontal view; MXP3 merus with V-shaped emargination on apical margin; mesial process of first gonopod prominently developed, protruding beyond caudal process, end piece longer than wide, convex, not protruding beyond terminal setae; aperture external, sub-terminal.

Type species. Gecarcinus planatus Stimpson, 1860 , by original designation.

Remarks. The taxonomy of Johngarthia Türkay, 1987 , has been somewhat uncertain (see Tavares 1991; Bouchard & Poupin 2009). Türkay (1970) originally described the taxon as a subgenus of Gecarcinus Leach, 1814 , but later Türkay (1987) decided to recognize it as a distinct genus, and this has been followed by a number of workers (see Hartnoll et al. 2006; Cuesta et al. 2007; Ng et al. 2008; Hartnoll 2010). Some other workers, however, regard Johngarthia as a junior synonym of Gecarcinus (e.g. Tavares 1991; Bouchard & Poupin 2009). As a taxonomic revision of the Gecarcinidae is beyond the focus of this study, we follow the treatment proposed by Ng et al. (2008) for the moment.