Confusastrea
D'Orbigny 1849, p. 10
The type is badly preserved and this is probably the reason why previous authors have used Isastrea, a better defined genus, despite the fact it is a junior synonym. This position that preserves stability was adopted in conformity with the nomenclatural code, ICZN art. 23.9.1 (see Lathuilière, Charbonnier and Pacaud 2017).
Type Species
Agaricia crassa Goldfuss 1826 p. 43, pl.12 fig. 13; Monotypy
Type Specimen: Lectotype; IPB 152; Verified; Dry Preserved
Type Locality: Upper Jurassic , Randen (Switzerland)
The type material is a lectotype by inference of holotype (art 74b). It is a pebble in which a large thin transverse section was made. See Morsch 1994 . Erroneously d'Orbigny (1849) mentionned Astrea crassa but not Agaricia crassa as the type species; his text of 1850 (p. 386) explicitly refered to the sample figured here and named Agaricia crassa in Goldfuss.
Classification
Description
Description of the lectotype: The type is a pebble in which no natural original outer limit of the fossil is visible. Massive cerioid colony. Radial elements are compact, confluent to non confluent, straight to bent septa or costo-septa. The centres of corallites are strongly recystallized. Radial symmetry modified by bilateral symmetry characterized by the torsion of septa. Transverse skeletal elements occur and are interpreted rather as dissepiments than synapticules.
Comparisons
Many confusions were made with Complexastrea. (see this genus)
This page has been in preparation since 07-May-2009 10:42
This version was contributed by Bernard Lathuilière on 21-Jul-2017 14:12.
Page authors are: Bernard Lathuilière 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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