Five new species of Trochidae from the northwestern Atlantic Ocean are described. Gaza olivacea, from the northern coast of South America, is similar to G. superba. Mirachelus acanthus, known only from Bermuda, most resembles M. clinocnemus. Calliotropis globosa, from off the Yucatan Peninsula, Mexico, Jamaica, and the northeastern coast of South America from Venezuela to Suriname, is most similar to C. actinophora. Calliotropis dentata, known only by the holotype from off Venezuela, is most similar to C. persculpta from off South Africa. Echinogurges tuberculatus, from off eastern Florida, the Straits of Florida, and the northern Bahamas, is most similar to E. clavatus. |