Wells, 1937:75

The new name p.p. replaced Hexastraea Volz, 1890, which is junior homonym of Hexastraea Bellardi, 1871 in Sismonda

Protoheterastraea Wells, 1937:75 is a replacement taxon for Hexastraea Volz, 1896: 90.

Type Species

Hexastraea leonhardi Volz, 1896: 92, pl. 11, fig.21-25; Subsequent Designation Wells, 1937: 75

Type Specimen: Holotype; MGUWr 139sz; Verified; Thin Section

Type Locality: St. Cassiano (=Stuores after Volz 1896), Dolomites. Carnian, Late Triassic

The species was described and illustrated in Roniewicz and Michalik 2002:151,Fig.4.1,2a-c.




Solitary. Septal apparatus regular, hexameral. Radial elements differentiated into four size orders with the strongest S1 septa. Lateral septal faces covered with small and abundant granulations. Mid-septal zone straight with discernible centers. Septal lateral stereome differentiated into fascicles of fibres. Endotheca tabular. Epithecal stereome thick, partly radial, partly differentiated into large, irregular fascicles of fibres.


Morphology was described by Volz 1896 and, recently, by Roniewicz and Michalik 2002 with illustrations of the microstructure of septa of the type material.


The genus, for its regular hexameral septal apparatus, tabular endotheca, microstructural features such as straight midseptal zone with well individualized centers and thick septal and wall stereome organized in fascicles, is not comparable to other taxa described so far.


Only the type species is known. Other corals described so far under generic name of Protoheterastraea need revision.


  • Southern Europe; Late Triassic
  • Central Europe; Late Triassic
Dolomites and Carpathians, Carnian, Late Triassic.

This page has been in preparation since 28-Apr-2009 23:46

This version was contributed by Ken Johnson on 14-Jan-2013 13:26.

Page authors are: Francesca Benzoni Ewa Roniewicz. Please contact the editor if you would like to contribute to the diagnosis of this taxon.

The editor is: Ewa Roniewicz

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