Hermit crabs from Brazil: Family Diogenidae (Crustacea: Decapoda: Paguroidea), except Paguristes Author Nucci, Paulo Ricardo Author Melo, Gustavo Augusto Schmidt De text Zootaxa 2015 3947 3 327 346 journal article 10.11646/zootaxa.3947.3.2 6173bd73-5471-4c1e-a758-5481ffbd97b5 1175-5326 240452 4BEA9B2D-E883-43B5-AE74-1EBBD0D4D684 Genus Petrochirus Stimpson, 1858 Type species. Cancer diogenes Linnaeus, 1758 Diagnosis . Fourteen pairs of gills with entire lamellae. Rostrum small, rounded, at level of lateral projections. Ocular peduncles slender; ocular scale separated. Antennal flagella with very short setae. Ischium of third maxillipeds with well developed crista dentata . Right cheliped stronger than left. Males with 4 unpaired pleopods (pl2–pl5) with inner ramus rudimentary. Females with 3 unpaired pleopods triramous (pl2–pl4), pl5 very small, with inner ramus rudimentary.