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Sphaeriaster
Taxonomy
Sphaeriaster was named by Dons (1939) [Sepkoski's age data: J Bajo-u J Tith Sepkoski's reference number: 1066]. It is extant.
It was assigned to Valvatida by Sepkoski (2002); and to Poraniidae by Dons (1939), Hess (1972) and Gale (2011).
It was assigned to Valvatida by Sepkoski (2002); and to Poraniidae by Dons (1939), Hess (1972) and Gale (2011).
Species
Synonymy list
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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
No diagnoses are available
Measurements
No measurements are available
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| Source: c = class, p = phylum | |||||
| References: Aberhan et al. 2004, Aberhan 1992 | |||||
Age range: Late/Upper Bajocian or 171.60000 to 167.70000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Late/Upper Bajocian | Switzerland | S. jurassicus (32036) |