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Shell structure of the Galapagos Rift limpet Neomphalus fretterae McLean 1981, with notes on muscle scars and insertions. American Museum novitates ; no. 2776

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dc.contributor.author Batten, Roger Lyman. en_US
dc.date.accessioned 2005-10-06T18:11:43Z
dc.date.available 2005-10-06T18:11:43Z
dc.date.issued 1984 en_US
dc.identifier.uri http://hdl.handle.net/2246/5253
dc.description 13 p. : ill. ; 26 cm. en_US
dc.description Includes bibliographical references (p. 12-13). en_US
dc.description.abstract "The principal shell layers of Neomphalus fretterae McLean, 1981, are an inner concentric crossed-lamellar and an outer complex crossed-lamellar layer. The protoconch is unusual in being composed of four layers rather than one or two as in most other gastropods. The narrow, high-angled crossed-lamellae of the inner principal layer are nearly identical with those of advanced mesogastropods, rather than the broader, low-angled archeogastropod crossed-lamellae. This, along with shell shape, ornament, and the presence of a muscle platform suggests a closer relationship with the mesogastropod limpets than with the archeogastropods. Muscle attachment is by direct muscle fiber insertion, forming tubules in the shell, and also by myo-adhesive epithelial cells which may form a myostracal layer. Based on the multiple layers found in the protoconch, I speculate on the possibility that the larval stage may have remained planktonic for an extended period"--P. [1]. en_US
dc.format.extent 4796347 bytes
dc.format.mimetype application/pdf
dc.language eng en_US
dc.language.iso en_US
dc.publisher New York, N.Y. : American Museum of Natural History en_US
dc.relation.ispartofseries American Museum novitates ; no. 2776 en_US
dc.subject.lcc QL1 .A436 no.2776, 1984 en_US
dc.subject.lcsh Neomphalus fretterae. en_US
dc.subject.lcsh Limpets -- Pacific Ocean -- Anatomy. en_US
dc.subject.lcsh Limpets -- Galapagos Islands -- Anatomy. en_US
dc.subject.lcsh Limpets -- Anatomy. en_US
dc.subject.lcsh Mollusks -- Pacific Ocean -- Anatomy. en_US
dc.subject.lcsh Mollusks -- Galapagos Islands -- Anatomy. en_US
dc.subject.lcsh Mollusks -- Anatomy. en_US
dc.subject.lcsh Living fossils. en_US
dc.title Shell structure of the Galapagos Rift limpet Neomphalus fretterae McLean 1981, with notes on muscle scars and insertions. American Museum novitates ; no. 2776 en_US
dc.title.alternative Galapagos Rift limpet en_US
dc.type text en_US


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  • American Museum Novitates
    Novitates (Latin for "new acquaintances"), published continuously and numbered consecutively since 1921, are short papers that contain descriptions of new forms and reports in zoology, paleontology, and geology. New numbers are published at irregular intervals.

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