|Die Caudofoveata des Mittelmeeres und das Genus Scutopus (Mollusca, Aculifera)|
von Salvini-Plawen, L. (1972). Die Caudofoveata des Mittelmeeres und das Genus Scutopus (Mollusca, Aculifera), in: Battaglia, B. (Ed.) Fifth European Marine Biology Symposium. pp. 27-51
In: Battaglia, B. (Ed.) (1972). Fifth European Marine Biology Symposium. Piccin Editore: Padova. 348 pp., more
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The poorly known aplacophorous molluscs were recently shown to consist of 2 distinct and independent classes, the Caudofoveata and the Solenogas-tres. Whereas the latter have been proved to inhabit the mediterranean with more than 30 species, the Caudofoveata (formerly Aplacophora-Chaetodermatida) are scarcely investigated. Since Kowalevsky's (1901) research `Sur le genre Chaetoderma' giving accounts of Prochaetoderma raduliferum (Kow) and Falcidens gutturosus (Kow) from the Sea of Marmara, over 60 yr passed before research on the Caudofoveata was taken up again. Neglecting a dubious finding of a Chaetoderma species near Naples, it was not before 1965 that Reys reported on some specimens of F.gutturosus near marseille. Recent investigations meanwhile proved this species to be spread all over the Mediterranean from 40-600 m; Prochaetoderma raduliferum likewise was refound (the depth ranging now from 54 to 1460 m), and a new species Falcidens aequabilis new species comes from the Southern Adriatic. In 1967/68 a new genus and species, Scutopus ventrolineatus Salv-Plaw, was recorded in Norway and proved to inhabit all deeper Scandinavian waters from 40-1248 m. The genus, which is characterized besides the radula by a mostly long but thin and coiled body with an anterior medioventral suture and a large foot-shield, represents until now the most archaic type within the Caudofoveata. Besides the manifold Scandinavian records, Scutopus ven-trolineatus could be found also in the mediterranean as well as in South African waters; moreover, a 2nd species, Scutopus robustus Salv-Plaw, inhabits the Scandinavian waters as well as the Mediterranean. Concerning this interesting, archaic genus Scutopus, 2 new species more which were collected during the Vema-expedition can be introduced, scutopus chilensis new species has been found off Valparaiso, off the peninsula Taytao and in the Strait of Magellan, whereas S. megaradulatus new species was recorded in the Carribean Sea. A further species gathered from localities along the Pacific coast of Central America, however, showing the same characteristic elongated and coiled body like most of the Scutopus but no ventral suture and a divided foot-shield, represents an intergeneric species Limifossor elongatus new species.