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The largest late Paleozoic bellerophontid gastropod

Published online by Cambridge University Press:  14 July 2015

Barry S. Kues  and
Harvey R. Duchene
Barry S. Kues
Affiliation:
Department of Geology, University of New Mexico, Albuquerque 87131
Harvey R. Duchene
Affiliation:
7122 Ridgeview Circle, Sedalia, Colorado 80135
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Extract

Some species of late Paleozoic bellerophontacean gastropods attained unusually large sizes. Yochelson (1960) described several Permian species from the American Southwest having shells more than 50 mm long, and noted that the largest North American specimen is an incomplete Leonardian steinkern more than 90 mm long, from the Glass Mountains of Texas. A Permian species of Bellerophon from Japan is up to 120 mm wide (Yochelson, 1960), and several Mississippian and Pennsylvanian species in the 90+ mm range are also known (Weir, 1931; Kues, 1987). Steinkerns of this size are not uncommon in Wolfcampian and Leonardian formations in New Mexico, but because of lack of preserved shell material and/or occurrence in massive limestones they are rarely collected and little is known about them. In this note we report and illustrate an unusually well preserved but incomplete Guadalupian bellerophontid from southern New Mexico. It is considerably larger than the specimens mentioned above, and appears to be the largest late Paleozoic bellerophontid yet reported.

Type
Paleontological Notes
Information
Journal of Paleontology , Volume 64 , Issue 3 , May 1990 , pp. 478 - 479
Copyright
Copyright © The Paleontological Society 

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References

Jagnow, D. H. 1989. The geology of Lechuguilla Cave, New Mexico. SEPM Core Workshop No. 13:459–466.Google Scholar
Kues, B. S. 1987. Pharkidonotus megalius, a large new gastropod species from the Middle Pennsylvanian of south-central New Mexico. Journal of Paleontology, 61:1187–1193.CrossRefGoogle Scholar
Weir, J. 1931. The British and Belgian Carboniferous Bellerophontidae. Transactions of the Royal Society of Edinburgh, 56:767–861.CrossRefGoogle Scholar
Yochelson, E. 1960. Permian Gastropoda of the southwestern United States, 3. Bellerophontacea and Patellacea. Bulletin of the American Museum of Natural History, 119:205–294.Google Scholar