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A New Species of Pinnularia (Pinnulariaceae) from Iron Rich, Highly Acidic Strip-Mined Coal Pits of South-Central Iowa

David B. Czarnecki and Edward T. Cawley
Proceedings of the Academy of Natural Sciences of Philadelphia
Vol. 147 (1997), pp. 111-117
Stable URL: http://www.jstor.org/stable/4065029
Page Count: 7
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
A New Species of Pinnularia (Pinnulariaceae) from Iron Rich, Highly Acidic Strip-Mined Coal Pits of South-Central Iowa
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Abstract

Pinnularia ferroindulgentissima Czarnecki & Cawley sp. nov., belonging to the section Capitatae (Cleve) Patrick, is described. It appears to be closey related to both Pinnularia brauniana (Grunow) Mills and Pinnularia mayeri Krammer; however it differs from both in the shape of the valve and the density of alveoli. Thus far, P. ferroindulgentissima is known to occur only in Iowa, in essentially unialgal conditions from epipelic habitats associated with strip-mined coal pits. The highly acidic, iron enriched waters of moderately high conductivity which support populations of this diatom sufficiently contrast those which support P. brauniana and P. mayeri, providing an ecological discrimination in addition to the morphological differences.

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