Upper Pliocene marine mollusks from Guafo Island, southern Chile. Part II. Gastropoda

Abstract

Marine fossil gastropods, from Guafo Island, Los Lagos Region, Southern Chile, are described, commented and figured. 18 species are recognized, being eight of them proposed as new. Thus it is, together with 16 bivalves previously recorded, the fossil mollusks of Guafo Island (bivalves and gastropods) make a whole of34 species, distributed in different localities of the island. The analysis of the fossiliferous asemblage strengthen the previously pointed out af finities with those faunas from Guamblín Island and Tubul (Tubul Fm. at Arauco). This three localities constitute equivalent entities, from both a faunistic and an environmental point of view. The age suggested by the gastropods is coincident with that assigned for bivalves, for the same deposits, that is to say, Late Pliocene. This age is, at last, the age proposed for the whole marine invertebrate fossil fauna from Guafo Island, in the localities considered in the study carried out.