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Tethyaster guerangeri

Asteroidea - Paxillosida - Astropectinidae

Taxonomy
Tethyaster guerangeri was named by Breton (1995). Its type specimen is Holotype and one paratype, Muséum of Le Mans and is a 3D body fossil. Its type locality is La Butte de Gazonfier, Le Mans (Sables et Grès du Mans), which is in a Cenomanian coastal claystone/sandstone in the Le Mans Formation of France.

Synonymy list
YearName and author
1995Tethyaster guerangeri Breton pp. 19-25 figs. figs 1-6, pl. 1-3

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Deuterostomia
Ambulacraria
phylumEchinodermata
subphylumEleutherozoa
Asterozoa()
RankNameAuthor
classAsteroidea
subclassAmbuloasteroidea
infraclassNeoasteroidea()
superorderValvatacea
orderPaxillosida
familyAstropectinidae
genusTethyaster
speciesguerangeri

If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.

Tethyaster guerangeri Breton 1995
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Diagnosis
ReferenceDiagnosis
G. Breton 1995Disk large. Five arms relatively short, triangular with broad base. Interbrachial arc low, rounded. R/r ratio approximately equals to three. Abactinal plates present to the arm tip. Small, low paxillae with a crown of 10-15 dense, cylindrical granules. Madreporite of large size circular, located at about 3/5 interbrachial ray. Marginal plates numerous (35-40 pairs per half-arc), opposite. Superomarginal plates short, high. Profile convex, triangular. Ornament of dense granules. Inferomarginal high, short, relatively broad. Profile highly convex. Tubercles larger in the median axis of the external face, bear flattened spines. Actinal plates in transverse and longitudinal rows present to two-third of the arm length. Adambulacral short, curved. Adambulacral spines compressed, flat. Oral projected. Fascioles deep, extending from marginals to the adambulacrals, some diverging within the actinolaterals. In marginals, fascioles slits with short spines, changed into granules internally. Ambulacral plates large, robust. Terminal plate short, heart-shaped. Surface with rounded granules.