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Microsolena

Lamouroux, 1821, p. 65

Type Species

Microsolena porosa Lamouroux 1821, p. 65, pl. 74 fig.24-26; Monotypy

Type Specimen: Syntype; ?; Not Traced; Unknown

Type Locality: Bathonian near Caen (Normandy, France)

The type species is not well described and has never been redescribed and figured since the discovery of pennulae by Gill (1967). Good representations of the genus are found in other species, see for instance Roniewicz (1966, 1976).

Classification

Synonyms

Description

Massive corallum. Thamnasterioid. Radial elements are fenestrate biseptal sheets often joining, attenuated at the inner edge but with a rather constant thickness elsewhere, straight to sinuous, and rather equal. Distal edge moniliform with regular teeth corresponding to distinct trabeculae, inner edge with more or less detached trabecules, lateral faces with pennulae regularly alternating with pennulae of the opposite biseptal sheet. Pennulae with their edges turned upward and ornamented with very small teeth. Microstructure with distinct trabeculae of which the axis is rarely well marked. No palis. Radial symmetry of the septal apparatus present but generally corrupted by the dominant intracalicular increase, bilateral symmetry. marked by the curvature of septa and the distribution of junctions of inner edges of septa. Endotheca made of dissepiments often oblique in longitudinal section and putting weight on the rims of pennulae. The centre of corallite is generally occupied by a small fossa. Detached trabeculae may fuse in the center but do not form a true columella in relief. synapticulae,present in various parts of the corallite. Wall absent.

Comparisons

Dimorpharaea is very similar and only different by the presence of a mother corallite surrounded by corallites in concentric rows issued of a circumoral budding. Kobya is not so regularly fenestrate.

Remarks

78 nominal species in Jurassic and 24 in Cretaceous (Löser 2002) (with some shared species)

This page has been in preparation since 19-Aug-2009 15:59

This version was contributed by Bernard Lathuilière on 08-Oct-2016 09:59.

Page authors are: Ewa Roniewicz Bernard Lathuilière. Please contact the editor if you would like to contribute to the diagnosis of this taxon.

The editor is: Bernard Lathuilière


conceptual model of a corallite of Microsolena after Stolarski and Roniewicz 2001
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