Uma nova espécie do gênero Trichopeltarion A. Milne-Edwards, 1880 coligida no talude continental brasileiro é descrita e ilustrada, nomeadamente Trichopeltarion pezzutoi n. sp. A nova espécie é comparada às suas congêneres do oceano Atlântico, Trichopeltarion nobile A. Milne-Edwards, 1880 e Trichopeltarion intesi (Crosnier, 1981). O registro de T. nobile para o Brasil deve ser atribuído à T. pezzutoi n. sp. São discutidas as diferenças entre os gêneros Trichopeltarion e Peltarion Jacquinot, 1847.

A new species of Trichopeltarion A. Milne-Edwards, 1880, is described from off coast of Brazil, namely Trichopeltarion pezzutoi n. sp. The new species is compared to its Atlantic congeners, Trichopeltarion nobile A. Milne-Edwards, 1880, and Trichopeltarion intesi (Crosnier, 1981). The record of T. nobile from Brazil should actually be attributed to T. pezzutoi n. sp. The differences between the genera Trichopeltarion and Peltarion Jacquinot, 1847 are discussed.

Dois machos e uma fêmea de Holothuriophilus tomentosus (Ortmann, 1894) comb. nov. foram coletados na Enseada de Ratones, Florianópolis, Santa Catarina, sul do Brasil. Desde sua descrição original, como Pinnaxodes tomentosus, esta espécie somente foi coletada recentemente no Pontal da Daniela, também em Florianópolis. O macho, ainda desconhecido, é descrito e a fêmea é redescrita. As características do material estudado nos leva a acreditar que Pinnaxodes tomentosus deve ser transferido para Holothuriophilus Nauk, 1880.

Two males and one female of Holothuriophilus tomentosus (Ortmann, 1894) comb. nov. were collected in Enseada de Ratones, Florianópolis, Santa Catarina, in southern Brazil. Since its original description, as Pinnaxodes tomentosus, this species has only been collected recently, from the Pontal do Daniela, also in Florianópolis. The previously unknown male is described and the female is redescribed herein. The characteristics of this material lead us to believe that Pinnaxodes tomentosus should be transferred to the genus Holothuriophilus Nauk, 1880.

During the project GEDIP, in the coast of the State of Rio Grande do Sul, with some stations off Uruguay, a specimen female of the brachyuran crab Lepteces ornatus Rathbun, 1893 was found. Up till now this species was known only by his type material, from Arrowsmith Bank, Yukatan, Mexico. Description, material examined and distribution are done.

The portunid Scylla serrata, widely distributed in the Indo-Pacific, is reported for the first time from the Southwestern Atlantic. A female specimen was captured at Peruíbe, State of São Paulo, by a fishing boat, at a depth of approximately 15 m. A detailed description of the specimens is given, with data on the geographical distribution of the species, and a discussion of the taxonomic status of the genus.