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

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Abstract

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.

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  1. Borissiak Paleontological Institute, Russian Academy of Sciences, Profsoyuznaya ul. 123, Moscow, 117997, Russia

    P. Yu. Parkhaev

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  1. P. Yu. Parkhaev
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Correspondence to P. Yu. Parkhaev.

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Original Russian Text © P.Yu. Parkhaev, 2014, published in Paleontologicheskii Zhurnal, 2014, No. 1, pp. 20–27.

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Parkhaev, P.Y. Structure of shell muscles in the Cambrian gastropod genus Bemella (Gastropoda: Archaeobranchia: Helcionellidae). Paleontol. J. 48, 17–25 (2014). https://doi.org/10.1134/S0031030114010092

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