Koby, 1905


Radial elements are compact costosepta, almost free. Costosepta bicuneiform, generally straight, sometimes curved according to the bilateral plan. Lateral faces smooth or displaying equal granules, regularly distributed in all directions. Distal margin smooth. The inner edge of septa shows strong periodical structures with ? auriculae. Mainly based on Ironella, the microstructure, typically neorhipidacanth, is conceived as indicated in the following figure from Roniewicz, 1976 Trabeculae are branching with numerous secondary trabeculae. Septa and corresponding costae are generally arranged in well defined size order.


This page has been in preparation since 02-Oct-2009 17:15

This version was contributed by Ken Johnson on 02-Oct-2009 17:15.

Page authors are: Bernard Lathuilière. Please contact the editor if you would like to contribute to the diagnosis of this taxon.

The editor is: Bernard Lathuilière

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