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Tropidaster
Taxonomy
Tropidaster was named by Forbes (1850) [Sepkoski's age data: J Plie-l J Plie-u Sepkoski's reference number: 934,1066]. It is not extant. Its type is Tropidaster pectinatus. It is the type genus of Tropidasteridae.
It was assigned to Tropidasteridae by Wright (1880) and Spencer and Wright (1966); and to Valvatida by Sepkoski (2002).
It was assigned to Tropidasteridae by Wright (1880) and Spencer and Wright (1966); and to Valvatida by Sepkoski (2002).
Species
T. pectinatus (type species)
Synonymy list
| Year | Name and author |
|---|---|
| 1850 | Tropidaster Forbes |
| 1880 | Tropidaster Wright |
| 1966 | Tropidaster Spencer and Wright p. U68 |
| 2002 | Tropidaster Sepkoski |
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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: o = order, c = class, p = phylum | |||||
| References: Aberhan 1992, Aberhan et al. 2004, Blake 1990 | |||||
Age range: Davoei or 189.60000 to 183.00000 Ma
Collections (2 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Pliensbachian | France | T. pectinatus (106348) | |
| Davoei | United Kingdom (England) | T. pectinatus (33336) |