Tanaidacea (Tanaidacea: Crustacea) from Brazil. IV. A new genus and two new species from the family Leptocheliidae

This study is based on the material collected from REVIZEE Program and under the Petrobrás oil-exploration programs.These collections revealed a number of representatives from the family Leptocheliidae in its broadest sense, with descrip-tions of one new genus, Makraleptochelia n. gen., and two new species, M. potiguara n. sp. and Intermedichelia jesserin. sp. The new genus appears to be closely related to Konarus-Parakonarus-Pseudoleptochelia complex of species anddiffers mainly in the extremely elongated habitus of the male. Intermedichelia jesseri is only the second recorded speciesof this genus and is separated from the other species by having two distal simple setae on the lateral projections of pere-onite 3, two distal simple setae on the maxilliped basis, one ventrodistal spiniform seta on the merus-carpus-propodus ofpereopod 3, and pereopods 4 and 5 propodus with one dorsodistal simple seta marginally longer than dactylus and unguis combined. Intermedichelia is here included in the family Leptocheliidae.

A new species of Mesokalliapseudes Lang, 1956 (Crustacea: Tanaidacea: Kalliapseudidae) from Puerto Rico, with remarks on the genus

A new kalliapseudid species, Mesokalliapseudes quadriflagellata n. sp. from Puerto Rico is described and illustrated. It can be distinguished from its congeners by the following combination of characteristics: 1) rounded rostrum, 2) pereonites lacking anterolateral apophyses, 3) fixed finger of cheliped two-thirds or more the length of the dactylus, and 4) serrate spiniform seta on the basis of pereopod 1. It is unique in having the inner flagellum of the antennule with 4 articles (all other congeners have 3 articles). Remarks on the genus Mesokalliapseudes are presented.

The presence of Varipes Lugo-Ortiz & McCafferty (Ephemeroptera: Baetidae) in Brazil, with the description of a new species

Varipes helenae, new species, (Ephemeroptera: Baetidae) is described based on nymphs collected from the State of Mato Grosso, Brazil. The new species is distinguished by setation of labrum, number of denticles in both mandibles, prostheca of right mandible bifid, not reduced, medial hump of maxilla with a spiniform seta, distomedial process of labial palp segment 2 rounded, relatively few setae on femora, and number of spines on the paraproct. This is the first report of the genus Varipes from Brazil.

Saltipedis navassensis, a new species of apseudomorph tanaidacean (Crustacea: Peracarida: Parapseudidae) from the tropical north-western Atlantic

Saltipedis navassensis n. sp. is reported and described from a sand bottom at a depth of 24 m off Navassa Island in the northern Caribbean. The description of the new species includes the first known male for the genus along with the first record of Saltipedis from the northern Atlantic. Saltipedis navassensis can be distinguished from other females of the genus by having an antennule with a serrated inner peduncular margin and pereopod 2 with plumose setae on the basis and no spiniform seta on the merus. A key to the known species of Saltipedis is presented.