A New Species of "Cypris Y" (Crustacea : Maxillopoda) from the North Pacific

Abstract

A new form of cypris y is described from the North Pacific off southern Honshu, Japan, under the name Hansenocaris tentaculata, sp. nov. The bifurcate paraocular process of this cypris y is unique in having very long branches, with anterior one being markedly sinuate. The postocular filamentary tufts are wanting. There are two closely set papillae behind each compound eye. The abdomen is composed of only two somites. The limits of the genus Hansenocaris as well as the taxonomic validity of the Facetotecta are discussed.