A new Species of Labiosthenolepis (Sigalionidae: Polychaeta)

摘要

Labiosthenolepis andamanensis sp. Nov. is described from the Andaman Sea, southwestern Thailand, and from Tanabe Bay, Japan. The bulk of the samples were collected from the Andaman Sea during the 'Effects of Offshore Tin Mining Project' in 1980-1982. Labiosthenolepis andamanensis differs from L. laevis (Mclntosh, 1885) by having oval, thin, flattened labial lobes and stylodes on the dorsal sides of segment 1, whereas in the latter species the labial lobes are thick, fleshy, lobulate, without stylodes on the dorsal sides of segment 1. The new species also differs from L. sibogae (Horst, 1917) by having dorsal tubercles on segment 3, which are absent in the latter species.