Nassarius (Mollusca: Neogastropoda) From The Neogene of Northwestern Ecuador

Abstract

The nassarid fauna from the Neogene formations of northwestern Ecuador consists of five species, none of which are known from either the Recent or fossil faunas of the Caribbean or Pacific.  There is one species with affinities to the western Pacific Recent fauna, one with affinities to Recent species in both the Caribbean and eastern Pacific faunas, the remaining three species are known only from the Ecuadorian Neogene, one of which, Nassarius mcmakini, n. sp., is confined to the Angostura Formation.