Actinaraea
Orbigny, 1849: 11
Junior subjective synonym is Camptodocis Dietrich, 1926.
Type Species
Agaricia granulata Münster, in Goldfuss, 1829: 109, pl. 38, fig: 4; Monotypy by d’Orbigny, 1849: 11
Type Specimen: Holotype; ; Not Traced; Unknown
Type Locality: Nattheim, Germany. Late Jurassic
Classification
Diagnosis
Thamnasterioid, lamellate colony with small calices delimited from extracalicular perithecal tissue. Radial elements structurally, regularly perforated, confluent. In the calice septal trabeculae inclined toward the center, in the peritheca trabeculae vertical. Columella papillar, made of a few trabeculae. Synapticulae in the peritheca, abundant. Endothecal elements tabuloid, traversing large parts of the colony.
Description
The type species described and illustrated in Becker and Milaschewitsch (1876: pl. 51, fig. 4); photo of the calicular surface in Geyer 1954: pl. 14, fig. 4 (small magnification); description and illustrations of the structure in thin sections in Roniewicz 1966: pl. 25, figs 2, 3 and Roniewicz 1976: pl.23, fig. 3a,b.
Comparisons
In skeleton structure (confluent and regularly porous radial elements, synapticulae, endotheca) similar to Actinaraeopsis, from which it differs in calices delimited from the perithecal colony tissue.
Remarks
Three species known from the Late Jurassic, A. granulata d’Orbigny, 1849 the most commonly cited in the literature. As Camptodocis Dietrich, 1926, known from the Early Cretaceous from East Africa, re-described and illustrated by Loeser, 2008.
Distribution
- Western Europe; Late Jurassic
- Central Europe; Late Jurassic
- Southern Europe; Early Cretaceous
Middle Oxfordian-Early Kimmeridgian in Poland. Early Kimmeridgian in Romania. Kimmeridgian-Beriasian in Bulgaria. Kimmeridgan in Germany. Upper Barremian in France. Early Cretaceous in East Africa.Contains
This page has been in preparation since 07-May-2009 07:16
This version was contributed by Ewa Roniewicz on 19-Nov-2010 16:48.
Page authors are: Ewa Roniewicz. 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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