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Calliasterella
Taxonomy
Calliasterella was named by Schuchert (1914) [Sepkoski's age data: C Mosc C Step-l Sepkoski's reference number: 1066]. Its type is Calliaster mirus. It is the type genus of Calliasterellinae, Calliasteridae. It was considered monophyletic by Blake and Hagdorn (2003).
It was assigned to Cryptozonia by Schuchert (1914); to Calliasterellinae by Owen (1965) and Spencer and Wright (1966); to Uractinida by Sepkoski (2002); and to Calliasterellidae by Schuchert (1915), Kesling and Strimple (1966), Blake and Hagdorn (2003), Blake and Elliott (2003) and Blake (2018).
It was assigned to Cryptozonia by Schuchert (1914); to Calliasterellinae by Owen (1965) and Spencer and Wright (1966); to Uractinida by Sepkoski (2002); and to Calliasterellidae by Schuchert (1915), Kesling and Strimple (1966), Blake and Hagdorn (2003), Blake and Elliott (2003) and Blake (2018).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 1914 | Calliasterella Schuchert p. 14 |
| 1915 | Calliasterella Schuchert pp. 190-191 figs. text-fig. 11, pl. 31 fig. 3 |
| 1965 | Calliasterella Owen p. 567 |
| 1966 | Calliasterella Kesling and Strimple p. 1160 |
| 1966 | Calliasterella Spencer and Wright p. U74 |
| 2002 | Calliasterella Sepkoski |
| 2003 | Calliasterella Blake and Elliott p. 488 |
| 2003 | Calliasterella Blake and Hagdorn p. 34 |
| 2018 | Calliasterella Blake p. 50 |
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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. †Calliasterella Schuchert 1914
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†Calliasterella americana Kesling and Strimple 1966
†Calliasterella mirus Trautschold 1879
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| D. B. Blake and D. R. Elliott 2003 | Neopalaeasterid-like stem-group asteroid with primary circlet ossicles not significantly enlarged; ossicles rectangular, transversely elongate. ‘‘Extraneous’’ or ‘‘X’’ ossicles not
developed. Carinal series differentiated, ossicles rectangular, transversely elongate, separated longitudinally by gap approximately equal to length of ossicle. Marginal-series ossicles robust, arched, shield-like. Arm margin defined by marginals, adambulacrals in approximately continuous lateral curve. Adambulacrals with ventral-lateral spine fringe. Axillary edges exposed laterally. Enlarged pustule bases absent, small, uniform, discrete pustules present. No granular accessory debris recognized. Ventral surface not exposed in available material. |
Measurements
No measurements are available
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| Source: c = class, p = phylum | |||||
| References: Aberhan et al. 2004, Aberhan 1992 | |||||
Age range: Missourian or 306.00000 to 303.70000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Missourian | USA (Illinois) | C. americana (51191) |