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An Anatomical Description of Eulima bilineata Alder with Remarks on and a Revision of Pyramidelloides Nevill (Mollusca, Prosobranchia, Eulimidae)
Author(s) -
WARÉN ANDERS
Publication year - 1983
Publication title -
zoologica scripta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.204
H-Index - 64
eISSN - 1463-6409
pISSN - 0300-3256
DOI - 10.1111/j.1463-6409.1983.tb00511.x
Subject(s) - biology , proboscis , prosobranchia , anatomy , penis , mollusca , commissure , zoology
The anatomy and biology of Eulima bilineata Alder is described and compared with PyramidelIoides miranda (A. Adams) and P. angusta (Hedley). All the species are parasitic on ophiuroids, have a ptenoglossate radula, an acrembolic proboscis with a pair of salivary glands close to the buccal mass and a reduced stomach with two histologically different digestive glands. The males have a well developed penis, the female a partly open or closed pallial oviduct. The central nervous system is concentrated. The sub‐ and supraoesophageal ganglia are completely integrated in the nerve ring. In Eulima , the supraoesophageal ganglion is split into two parts. Few differences were found between the species investigated, and it is concluded that Pyramidelloides should be classified in Eilimidae, not in Rissoidae where it has been placed previously.