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Pseudarchasteridae
Taxonomy
Pseudarchasterinae was named by Sladen (1889). It is extant. Its type is Pseudarchaster.
It was reranked as the family Pseudarchasteridae by Mah and Blake (2012) and Gale (2020).
It was assigned to Archasteridae by Sladen (1889); to Goniasteridae by Spencer and Wright (1966), Eagle (1999) and Blake and Jagt (2005); to Valvatida by Mah and Blake (2012); and to Paxillosida by Gale (2020).
It was reranked as the family Pseudarchasteridae by Mah and Blake (2012) and Gale (2020).
It was assigned to Archasteridae by Sladen (1889); to Goniasteridae by Spencer and Wright (1966), Eagle (1999) and Blake and Jagt (2005); to Valvatida by Mah and Blake (2012); and to Paxillosida by Gale (2020).
Subtaxa
Synonymy list
| Year | Name and author |
|---|---|
| 1889 | Pseudarchasterinae Sladen p. 109 |
| 1966 | Pseudarchasterinae Spencer and Wright p. U59 |
| 1999 | Pseudarchasterinae Eagle p. 551 |
| 2005 | Pseudarchasterinae Blake and Jagt p. 185 |
| 2012 | Pseudarchasteridae Mah and Blake p. 3 |
| 2020 | Pseudarchasteridae Gale p. 311 |
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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.
Fm. Pseudarchasteridae Sladen 1889
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G. Pseudarchaster Sladen 1889
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Pseudarchaster discus Fischer 1911
†Pseudarchaster motutaraensis Eagle 1999
†Pseudarchaster portlandicus Hess 1955
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| M.K. Eagle 1999 | Abactinal plates paxilliform or tabulate; superambulacra in rudimentary form; pedicellariae, if present, spinniform, fasciolar, or incipiently bivalved. | |
| A.S. Gale 2020 | Paxillosid asteroids which possess a marginal frame carrying shallow intermarginal fascioles; tube feet with a flattened termination; oral ossicle pairs with a single, proximally directed spine in each interradius. |
Measurements
No measurements are available
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| Source: subf = subfamily, c = class, p = phylum | |||||
| References: Aberhan 1992, Blake 1990, Aberhan et al. 2004 | |||||
Age range
Maximum range based only on fossils: base of the Tithonian to the top of the Altonian or 152.10000 to 15.90000 Ma
Minimum age of oldest fossil (stem group age): 145.0 Ma
Minimum age of oldest fossil (stem group age): 145.0 Ma
Collections (5 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Tithonian | United Kingdom | Pseudarchaster portlandicus (59916) | |
| Late/Upper Cretaceous | USA (Washington) | Sucia suavis (59921) | |
| Danian | Denmark | Skiaster vikingr (78711) | |
| Oligocene | USA (Alaska) | Pseudarchaster sp. (59917) | |
| Altonian | New Zealand | Pseudarchaster motutaraensis (91055) |