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Valettaster
Taxonomy
Valettaster was named by Lambert (1914) [Sepkoski's age data: J Bath K Maes
Valettaster proposed for Tholaster Spencer (1913), homonym of Tholaster Seunes (1896)]. It is not extant. Its type is Oreaster ocellatus.
It was assigned to Stauranderasteridae by Lambert (1914); to Valvatida by Sepkoski (2002); and to Sphaerasteridae by Spencer and Wright (1966), Villier (2010), Gale (2021) and Loba and Radwańska (2022).
It was assigned to Stauranderasteridae by Lambert (1914); to Valvatida by Sepkoski (2002); and to Sphaerasteridae by Spencer and Wright (1966), Villier (2010), Gale (2021) and Loba and Radwańska (2022).
Species
Species lacking formal opinion data
Synonyms
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Synonymy list
Year | Name and author |
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1913 | Tholaster Spencer p. 136 |
1914 | Valettaster Lambert p. 27 |
1966 | Valettaster Spencer and Wright p. U55 |
2002 | Valettaster Sepkoski |
2010 | Valettaster Villier p. 714 |
2021 | Valettaster Gale p. 725 |
2022 | Valettaster Loba and Radwańska p. 94 |
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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.
G. †Valettaster Lambert 1914
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†Valettaster argus Spencer 1907
†Valettaster dangeardi Mercier 1935
†Valettaster digitatus Quenstedt 1858
†Valettaster granulatus Brünnich-Nielsen 1943
†Valettaster ocellatus Forbes 1848
†Valettaster planus Loba and Radwańska 2022
†Valettaster stipes Villier 2010
†Valettaster thuyi Gale 2021
Invalid names: Tholaster Spencer 1913 [replaced]
Diagnosis
Reference | Diagnosis | |
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A.S. Gale 2021 | Sphaerasteridae in which the undifferentiated primary body ossicles have the form of a truncated cone. The flat top of the cone forms the external face of the ossicle, and carries beads of imperforate stereom. The interstices between the faces of the abactinal
ossicles are packed with smaller ossicles which also carry a beaded sculpture. Together, the primaries and the interstitial ossicles form a flush outer surface. Tiny papular pores are formed by embayments in two or three interstitial ossicles. |