One new genus and five new species of deep-sea bryozoans from the subantarctic Southwest Atlantic

Abstract

In this study we introduce onenew genus and five new species of cheilostome bryozoans based on material collectedmainly at bathyal depths in the Subantarctic Southwest Atlantic by the vesselsARA Bahía Blanca, BO Puerto Deseado and RV Meteor. Bathyanasca incubatrix gen.nov., sp. nov., Chondriovelum perforatum sp. nov., Aspidostoma adeoniforme sp.nov., Talivittaticella bathyalis sp. nov. and Turritigera formidabilis sp. nov.are described and illustrated. Bathyanasca incubatrix, characterized by thelack of ovicells and the incubation of embryos within the autozooidal cavity,is tentatively classified in the family Calloporidae. Present resultscontribute to support the hypothesis of close faunal affinities betweenAntarctica and relatively deep areas around southern South America.