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Thamnosmilia

Tomes, 1886, p. 396

Type Species

Thamnosmilia annulata Tomes 1886, p. 396, pl. 10 fig. 7-9; Monotypy

Type Specimen: Syntype; NHMUK R 10832, R 11576, R 11578; Verified; Dry Preserved

Type Locality: Oolite Marl (Bajocian, Middle Jurassic) of Leckhampton Hill (Great Britain)

The specimen R 10832 is labelled "type" and other "paratypes" but no real lectotype was selected and published. Pending the designation of a lectotype, all are considered as syntypes.

Description

Dendroid corallum with short branches. Rugose thick and wrinkled epitheca. Cutting calicular edge, infundibuliform calice. Corallite outline circular to lobate, extracalicular increase, Radial elements are subcompact frequently anastomosed, of a rather constant thickness (excluding ornamentation) straight or slightly curved septa. Pores are wide openings not necessarily close to the inner edge. Distal edge not well preserved, inner edge generally anastomosed, some major septa can join the axial structure. Lateral faces are ornamented with granules, no pali. Microstructure unknown. Hexameral symmetry difficult to decipher, bilateral symmetry with elongation of the axial zone. Endotheca of steeply inclined vesicular dissepiments, columella parietal, sublamellar in the specimen R 10832, synapticulae probably absent, peripheral wall of unknown nature.

Comparisons

Thamnosmilia shares many characters with the solitary Polystylidium especially the external rugose aspect, the pores and anastomoses.

Remarks

One nominal species.

Distribution

  • Western Europe; Middle Jurassic

This page has been in preparation since 20-Aug-2009 09:22

This version was contributed by Bernard Lathuilière on 28-Apr-2017 09:28.

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


intial syntypes of Thamnosmilia annulata type species of the genus
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Lectotype of Thamnosmilia annulata type species of the genus
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Paralectotype of Thamnosmilia annulata type species of the genus
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Paralectotype of Thamnosmilia annulata type species of the genus
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See all illustrations