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Villebrunaster

Somasteroidea -

Taxonomy
Villebrunaster was named by Spencer (1951) [Sepkoski's age data: O Aren-l Sepkoski's reference number: 805]. It is not extant. Its type is Villebrunaster thorali. It is the type genus of Villebrunasteridae. It was considered monophyletic by Dean Shackleton (2005).

It was assigned to Villebrunasteridae by Spencer and Wright (1966); to Goniactinida by Sepkoski (2002); to Chinianasteridae by Spencer (1951), Owen (1965) and Dean Shackleton (2005); and to Somasteroidea by Blake (2013).

Synonyms
Synonymy list
YearName and author
1951Villebrunaster Spencer pp. 93-94
1963Ampullaster Fell p. 143
1965Villebrunaster Owen p. 543
1966Ampullaster Spencer and Wright p. U41
1966Villebrunaster Spencer and Wright p. U41
2002Ampullaster Sepkoski, Jr.
2002Villebrunaster Sepkoski, Jr.
2005Villebrunaster Dean Shackleton p. 64
2013Villebrunaster Blake p. 363

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
Ambulacraria
RankNameAuthor
phylumEchinodermata
subphylumAsterozoa
classSomasteroidea()
genusVillebrunaster

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.

Diagnosis
ReferenceDiagnosis
W. K. Spencer 1951A chinianasterid with small ambulacral basins which served for insertion of the bases of the tube feet arranged, except near mouth, along the sides of a tube which is closed along the mid-radius.
J. Dean Shackleton 2005Longitudinal articulation between adjacent ambulacrals abutting in oral view; podial basin of restricted size, not occupying total region between adjacent ambulacral transverse bars; straight perradial suture; distal ambulacral podial flange larger than proximal flange; inter-virgal plates.