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.authorBatten, Roger Lyman.en_US
dc.date.accessioned2005-10-06T18:11:43Z
dc.date.available2005-10-06T18:11:43Z
dc.date.issued1984en_US
dc.description13 p. : ill. ; 26 cm.en_US
dc.descriptionIncludes 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.extent4796347 bytes
dc.format.mimetypeapplication/pdf
dc.identifier.urihttp://hdl.handle.net/2246/5253
dc.languageengen_US
dc.language.isoen_US
dc.publisherNew York, N.Y. : American Museum of Natural Historyen_US
dc.relation.ispartofseriesAmerican Museum novitates ; no. 2776en_US
dc.subject.lccQL1 .A436 no.2776, 1984en_US
dc.subject.lcshNeomphalus fretterae.en_US
dc.subject.lcshLimpets -- Pacific Ocean -- Anatomy.en_US
dc.subject.lcshLimpets -- Galapagos Islands -- Anatomy.en_US
dc.subject.lcshLimpets -- Anatomy.en_US
dc.subject.lcshMollusks -- Pacific Ocean -- Anatomy.en_US
dc.subject.lcshMollusks -- Galapagos Islands -- Anatomy.en_US
dc.subject.lcshMollusks -- Anatomy.en_US
dc.subject.lcshLiving fossils.en_US
dc.titleShell structure of the Galapagos Rift limpet Neomphalus fretterae McLean 1981, with notes on muscle scars and insertions. American Museum novitates ; no. 2776en_US
dc.title.alternativeGalapagos Rift limpeten_US
dc.typetexten_US

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