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Seriastraea

Schaefer and Senowbari-Daryan, 1978:118

Type Species

Seriastraea multiphylla Schaefer et Senowbari Daryan, 1978: 119, pl. 1, fig. 1, pl. 2, fig. 2, text-fig.1, 2; Monotypy Schaefer et Senowbari Daryan, 1978: 119

Type Specimen: Holotype; SMF 30748; Verified; Dry Preserved

Type Locality: Gruber-Riff at Hintersee / Salzburg, Northern Calcareous Alps. Late Rhaetian or Rhaeto-Lias

Classification

Diagnosis

Thamnasterioid. Increase by circumoral budding. Septa generally compact, thin; possible desintegration of the septal blades into thick trabeculae. Menianes protruding, their edge smooth and directed upwards. Synapticulae numerous in the intercalicular zone. Columella styliform, thick and complex in structure. Dissepiments vesicular.

Description

Well described and illustrated in Shaefer and Senowbari-Daryan 1978, and its resemblance to other thamnasterioid genera discussed. The microstructure is illustrated in Roniewicz 1989: pl.31,fig.2,3.

Comparisons

From the most similar, meniane-bearing Triassic thamnasterioid genus Thamnasteriamorpha Melnikova,1971 it differs in cirumoral budding producing very distant from each other rows of calices, thin septa showing tendency to porosity, and a mass development of synapticulae in the intercalicular zone.

Remarks

Two species are known.

Distribution

  • Southern Europe; Late Triassic
Northern Calcareous Alps, uppermost Rhaetian.

This page has been in preparation since 24-Apr-2009 17:28

This version was contributed by Ewa Roniewicz on 07-Nov-2010 11:09.

Page authors are: 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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