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Donacosmilia

Fromentel, 1861, p. 146

Type Species

Donacosmilia corallina Fromentel 1861, p. 146; Subsequent Designation Wells, 1936, p. 110

Type Specimen: Lectotype; MNHN M03913; Verified; Dry Preserved

Type Locality: Ecuelle (Haute Saône, France), Oxfordien.

The lectotype is a sectioned specimen and a thin section

Classification

Synonyms

Description

Phaceloid corallum with long parallel branches covered by a striated epitheca s.l.. According to authors the mode of increase is considered as Taschenknospung or lateral budding. Radial elements are compact septa sensu stricto. They are either free, anastomosed or contratingent with a fairly constant thickness. Lonsdaleoid septa present. Distal edge undescribed. Lateral faces with granules almost smoothed by stereoplasm. The inner edge is fused with other septa or not. Radial symmetry dominant. A bilateral symmetry is often visible due to elongation and/or eccentricity of the axial structure, to curvature of septa rather than the occurrence of an axial septum which is disputed among authors. Transverse sections show an axial pit or major septa anastomosing in the axial region. Wall made of several vertical laminae built with very small trabeculae perpendicular to wall surfaces as in Zardinophyllidae. Endotheca predominantly made of tabuloid dissepiments in the central part and of large vesicular dissepiments at the periphery. No pali, no synapticules

Remarks

7 nominal jurassic and two cretaceous species

Distribution

  • Western Europe, Southern Europe, Central Europe, Central Asia, East Asia; Late Jurassic - Early Cretaceous

This page has been in preparation since 18-Aug-2009 16:52

This version was contributed by Bernard Lathuilière on 01-Mar-2010 13:50.

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


Lectotype of Donacosmilia corallina type species of the genus
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Lectotype of Donacosmilia corallina type species of the genus
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Lectotype of Donacosmilia corallina type species of the genus
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Lectotype of Donacosmilia corallina type species of the genus
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