PBDB

Basic info	Taxonomic history	Classification	Relationships
Morphology	Ecology and taphonomy		Age range and collections

Urasterella

Asteroidea - Platyasterida - Urasterellidae

Taxonomy

Urasterella was named by McCoy (1851) [Sepkoski's age data: O Llde C Mosc Sepkoski's reference number: 248]. It is the type genus of Urasterellidae.

It was assigned to Uractinida by Sepkoski (2002); to Urasterellinae by Dean Shackleton (2005); and to Urasterellidae by Schuchert (1915), Spencer (1918), Withers and Keble (1934), Lehmann (1957), Owen (1965), Spencer and Wright (1966) and Blake and Rozhnov (2007).

Species

Roemeraster asperula, U. asperrimus, U. constellata, U. creswelli, U. grandis (syn. Palaeaster harrisi), U. gutterfordensis, U. huxleyi, U. montana, U. pulchella, U. ruthveni, U. thraivensis, U. verruculosa

View classification of included taxa

Synonyms

Roemeraster was named by Stürtz (1886).

It was synonymized subjectively with Urasterella by Schuchert (1915), Spencer (1918) and Blake and Rozhnov (2007).
Palasteracanthion was named by Stürtz (1886).

It was synonymized subjectively with Urasterella by Schuchert (1915).
Phillipaster was named by Spencer (1950) [Sepkoski's age data: S Ldov]. It is not extant. Its type is Palaeaster coronella.

It was synonymized subjectively with Urasterella by Dean Shackleton (2005) and Blake and Rozhnov (2007).

It was assigned to Urasterellidae by Owen (1965) and Spencer and Wright (1966); and to Uractinida by Sepkoski (2002).

Synonymy list

Year	Name and author
1851	Urasterella McCoy p. 59
1886	Roemeraster Stürtz p. 85
1886	Palasteracanthion Stürtz p. 153
1915	Urasterella Schuchert pp. 173-178
1918	Urasterella Spencer pp. 135-137
1934	Urasterella Withers and Keble p. 234
1950	Phillipaster Spencer
1957	Urasterella Lehmann pp. 127-128
1965	Urasterella Owen p. 565
1965	Phillipsaster Owen p. 566
1966	Phillipsaster Spencer and Wright p. U71
1966	Urasterella Spencer and Wright p. U71
2002	Phillipaster Sepkoski, Jr.
2002	Urasterella Sepkoski, Jr.
2005	Urasterella Dean Shackleton p. 99
2007	Urasterella Blake and Rozhnov p. 524

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Rank	Name	Author
kingdom	Animalia	()
—	Triploblastica
—	Nephrozoa
—	Deuterostomia
—	Life
—	Ambulacraria
phylum	Echinodermata

Rank	Name	Author
subphylum	Asterozoa
class	Asteroidea
order	Platyasterida
suborder	Uractinina	()
family	Urasterellidae
genus	Urasterella

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

Reference	Diagnosis
J. Dean Shackleton 2005	Adjacent adambulacrals overlap; inferomarginals of paxillate morphology.