Four new species of Provanna Dall (Prosobranchia,Cerithiacea?) from East Pacific hydrothermal sites |
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| Authors: | ANDERS WARÉN PHILIPPE BOUCHET |
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| Institution: | Anders Warén, Department of Zoology, University of Göteborg, Box 25059, S-400 31 Goteborg, Sweden. Present address: Department of Zoology Invertebrate, Swedish Museum of Natural History, Box 50007, S-104 05 Stockholm, Sweden.;Philippe Bouchet. Lahoratoire de Biologie des Invertebres Marins et de Malacologie, Museum National d'Histoire Naturelle, 55 Rue de Buffon, F-75005 Paris, France. |
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| Abstract: | Four new species of Provanna Dall, 1918 are described from East Pacific hydrothermal sites: Provanna ios sp.n., P. goniata sp.n., P. echinata sp.n. and P. variabilis sp.n. The type species of Provanna, P. Iomana Dall, 1918 and Trichotropis (Cerithioderma) pacifica Dall, 1908. which here is transferred to Provanna , are the only additional species known of the genus. Results of some preliminary anatomical investigations are given and a tentative position in the Cerithiacea is suggested. The four new species were collected by manned submersibles from sites of hydrothermal activity; P. Iomana has been dredged on two occasions only. from an area known for hydrothermal activity and we assume that the type- and only known locality for P. pacifica also is affected by hydrothermal acitivity. |
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