Structure of shell muscles in the Cambrian gastropod genus Bemella (Gastropoda: Archaeobranchia: Helcionellidae)

Zones with peculiar microornamentation interpreted as muscle scars were found on the internal molds of the Early Cambrian gastropod genus Bemella Missarzhevsky, 1969 (family Helcionellidae). Shell muscles of helcionellids are reconstructed based on the topographic pattern of muscle scars, i.e., the...

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Bibliographic Details
Published in:Paleontological journal 2014-02, Vol.48 (1), p.17-25
Main Author: Parkhaev, P. Yu
Format: Article
Language:English
Subjects:
Earth and Environmental Science
Earth Sciences
Gastropoda
Mollusca
Paleontology
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Summary:Zones with peculiar microornamentation interpreted as muscle scars were found on the internal molds of the Early Cambrian gastropod genus Bemella Missarzhevsky, 1969 (family Helcionellidae). Shell muscles of helcionellids are reconstructed based on the topographic pattern of muscle scars, i.e., the pedal, cephalic, and mantle retractors are recognized. The reconstruction proposed here of the shell musculature corroborates affinity between ancient gastropod and helcionelloid mollusks.
ISSN:0031-0301
1555-6174
DOI:10.1134/S0031030114010092