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Terminaster
Taxonomy
Terminaster was named by Hess (1974) [Sepkoski's age data: J Sine-l J Oxfo Sepkoski's reference number: 911,1066]. It is not extant. Its type is Asterias cancriformis. It is the type genus of Terminasteridae. It was considered monophyletic by Hess (1974) and Gale (2011).
It was assigned to Zoroasteridae by Hess (1974); to Forcipulatida by Sepkoski (2002); to Forcipulatacea by Villier et al. (2009); to Terminasteridae by Gale (2011), Gale (2011) and Ewin and Gale (2020); and to Zorocallida by Fau and Villier (2023).
It was assigned to Zoroasteridae by Hess (1974); to Forcipulatida by Sepkoski (2002); to Forcipulatacea by Villier et al. (2009); to Terminasteridae by Gale (2011), Gale (2011) and Ewin and Gale (2020); and to Zorocallida by Fau and Villier (2023).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 1974 | Terminaster Hess p. 657 |
| 2002 | Terminaster Sepkoski |
| 2009 | Terminaster Villier et al. p. 390 |
| 2011 | Terminaster Gale p. 84 |
| 2020 | Terminaster Ewin and Gale p. 942 |
| 2023 | Terminaster Fau and Villier p. 10 |
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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.
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| H. Hess 1974 | Size small. Form stellate with reduced disc and cylindrical arms. Primary plates of the disc clearly differentiated with one centrodorsal and a crown of radial and interradial plates. Plates of the arm large, aligned in well-defined rows (radial, superomarginal and inferomarginal plates) and each plate with a spine. Few Additional and reduced abactinal plates intercalated between radial and superomarginal plates. Adambulacral plates all of the same shape, with ornament of two spines. Two rows of podia. Mouth angle plate with a large oral spine. First adambulacral plates of adjoining arms in contact interbrachially. Terminal plate very large with aligned tubercles for articulation of spines on oral margins and smaller tubercles on the dorsal side. Pedicellariae absent. |
Measurements
No measurements are available
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| Source: c = class, p = phylum | |||||
| References: Aberhan 1992, Aberhan et al. 2004 | |||||
Age range: base of the Sinemurian to the top of the Late/Upper Oxfordian or 199.30000 to 155.70000 Ma
Collections (6 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Liasicus | Belgium (Luxembourg) | T. sp. (40087) | |
| Sinemurian | Luxembourg | T. spinulosus, T. sp. (32014) | |
| Callovian | Germany (Brandenburg) | T. cancriformis (32016) | |
| Early/Lower Callovian | France | T. cancriformis (58221) | |
| Late/Upper Oxfordian | Switzerland | T. cancriformis (58317) | |
| Late/Upper Oxfordian | France | T. cancriformis (61724) |