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A new mound-building biota from the lower Carboniferous of Alabama

Published online by Cambridge University Press:  20 January 2020

David C. Kopaska-Merkel Open the ORCID record for David C. Kopaska-Merkel [Opens in a new window] ,
Douglas W. Haywick  and
Richard G. Keyes
David C. Kopaska-Merkel
Affiliation:
Geological Survey of Alabama, P.O. Box 869999, Tuscaloosa, Alabama 35486-6999, USA
Douglas W. Haywick
Affiliation:
University of South Alabama, LSCB 136, Mobile, Alabama 36688, USA
Richard G. Keyes
Affiliation:
P.O. Box 21061, Huntsville, Alabama 35813, USA
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Abstract

A small (1.2 m) columnar carbonate mound in shaley strata equivalent to the Hartselle Sandstone (lower Serpukhovian) near Woodville, northeastern Alabama, was built by a consortium of species unlike those of other Carboniferous mounds in the southeastern United States. The mound contains a new problematic microencruster, Aphralysia anfracta new species, along with encrusting bryozoans (Fistulipora M'Coy, 1849), nonskeletal microbes, and other microencrusters, including Aphralysia capriorae Mamet and Roux, 1975, in a carbonate mud matrix. Mound cavities are filled with three generations of carbonate and siliciclastic sediment. Other biotic constituents of the mound include oncoids, sponges (including Pileospongia Rigby, Keyes, and Horowitz, 1979), gastropods, crinoids, a tabulate coral, and coenobionts, including coccoid calcimicrobes. The mound biota, especially the microencrusters, is dramatically different from those of other Serpukhovian mounds that have been described from Alabama (made by various consortia of rugose corals, fenestrate bryozoans, crinoids, sponges, and nonskeletal microbes). Indeed, the Woodville mound extends the range of the lower Carboniferous encruster Aphralysia Garwood, 1914 to North America.

UUID: http://zoobank.org/d3988875-a7fb-4382-bd14-b17c083d87ad

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Journal of Paleontology , Volume 94 , Issue 3 , May 2020 , pp. 436 - 456
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Copyright © 2020, The Paleontological Society

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Article updated 04 June 2025

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