A new species of the porcelain crab genus Petrolisthes from the Pacific coast of Panama, with taxonomic notes on closely related species (Decapoda: Anomura: Porcellanidae).

A new species of porcelain crab, Petrolisthes lazarus sp. nov., is described from the Pacific coast of Panama, based on two female specimens.

New findings of the stenopodidean shrimp Microprosthema looensis Goy amp; Felder, 1988 (Decapoda: Stenopodidea: Spongicolidae).

The spongicolid genus Microprosthema Stimpson, 1860 is currently composed of 16 species inhabiting tropical and subtropical marine shallow waters worldwide, with six species found in the western Atlantic (one of them also present in the central and eastern Atlantic), one species in the eastern Pacific, and nine species in the Indo-West Pacific (Saito Okuno 2011; Goy Martin 2013; Saito Anker 2014; De Grave et al. 2016). The genus is characterised by the somewhat depressed body; the carapace more or less densely covered by spines (except in one species); the third maxilliped with a long exopod; the first pereopod with a setiferous organ on the carpus and propodus; the third pereopod greatly enlarged and elongate; and the telson with one tooth on the lateral margin (Holthuis 1946; Poore 2004; Saito Okuno 2011).

A review of the records of Pachycheles rugimanus A. Milne-Edwards, 1880 (Crustacea: Decapoda: Anomura: Porcellanidae) from Brazil, with the description of a new species.

All previous records of Pachycheles rugimanus A. Milne-Edwards, 1880, from the Brazilian coast are reviewed and prove to represent a new species, P. coelhoi sp.

Porcelain crabs from Brazil (Crustacea: Decapoda: Anomura: Porcellanidae).

Twenty species of porcelain crabs are reported on the basis of material collected from Brazilian coasts. Considering the lack of systematic studies comprehending the Brazilian porcellanids, the present work presents a review of the regional species based on the current taxonomic information. New records, information about variation between specimens and a taxonomic discussion are given for porcellanid crabs from Brazil.