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Stauraster
Taxonomy
Stauraster was named by Valette (1928). It is not extant.
It was assigned to Stauranderasteridae by Valette (1928) and Gale (2021).
It was assigned to Stauranderasteridae by Valette (1928) and Gale (2021).
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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. †Stauraster Valette 1928
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| A.S. Gale 2021 | Stauranderasterid with short, rapidly tapering arms, made up of seven columns of similarly sized and -shaped ossicles (radials, adradials, superomarginals, inferomarginals). Disc including two circlets of ossicles; outer ring made up of primary radials and interradials and inner one of inner calycinal plates surrounding ce. Radials transversely broad, sub-rectangular. Sculpture of deeply impressed granule pits on abactinals and marginal ossicles. |
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 Late/Upper Pliensbachian to the top of the Middle Oxfordian or 189.60000 to 155.70000 Ma
Collections (5 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Late/Upper Pliensbachian | France | S. billodense (72286) | |
| Late/Upper Bathonian | France | S. billodense (72284) | |
| Middle Oxfordian | France | S. billondensis (62708 62710 62715) |