New Records of the Shrimps Hymenopenaeus tropicalis and Parapenaeus americanus from Brazil

Abstract

A SMALL number of unknown shrimps were among the material obtained from one station (24° 25′ S., 44° 40′ W.), about 40 miles south-east of Punta do Boi, São Sebastião Island, in June 1962, on a muddy bottom and at a depth of 130 m. These were kindly identified by Dr. F. A. Chace, jun., of the Smithsonian Institute, as Hymenopenaeus tropicalis (Bouvier) and Parapenaeus americanus Rathbun( ?). According to Dr. Chace the latter could be an undescribed species, on the basis of apparent thelycal differences, but no final statement could be made before some adult specimens were examined. The specimens of P. americanus (one male and two females) had a total length of 47 and 48 mm respectively. So far as can be ascertained, both species have not previously been encountered from Brazilian waters.