Actinastrea
Orbigny, 1849, p. 10
Type Species
Actinastrea goldfussi d'Orbigny, 1850, p. 10; Subsequent Designation Loeser, 2012, p. 17
Type Specimen: Syntype; ; Verified; Dry Preserved
Type Locality: Maastrichtian of The Netherlands.
The lectotype of the type species are housed at IPB (Bonn) under 233c#2, Goldfuss collection. Additional original material is housed at IPB under 233a and b, Goldfuss collection.
Classification
Synonyms
Diagnosis
Corallum colonial, massive, cerioid to subcerioid. Gemmation extra- and intracalicinal. Corallum may be covered by a holotheca. Corallites small and prismatic in outline, directly united by their walls. No intercalicinal coenosteum. Columella styliform. Synapticulae present, peripherally. Endothecal dissepiments sparse. Septa compact, generally non-confluent, radially or bilaterally arranged. Septal flanks covered by spiniform granulae. Renflements and pali present. Wall septothecal with pores (lacunes).
Remarks
Recently. Loser (2012) carried out a revision on the genus Actinastrea. According to him, this genus was characterized by an intercalicinal coenosteum. However, study of the lectotype of the type species of Actinastrea revealed that an intercalicinal coenosteum is absent. The corresponding structures are extracalicinal and extracalicinal-marginal developments of new corallites, consisting of protosepta encircling a styliform columella (Baron-Szabo, in press and in prep.).
Distribution
- North America; Middle Jurassic - Late Cretaceous
- North Africa; Late Jurassic
- Eastern Europe, Central Asia; Early Cretaceous - Late Cretaceous
- Southern Europe, Central Europe, Caribbean; Early Cretaceous - Eocene
Contains
This page has been in preparation since 02-Jun-2007 12:35
This version was contributed by Rosemarie Baron-Szabo on 17-Sep-2013 17:53.
Page authors are: Rosemarie Baron-Szabo. Please contact the editor if you would like to contribute to the diagnosis of this taxon.
The editor is: Rosemarie Baron-Szabo
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