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Fandasterias
Taxonomy
Fandasterias was named by Blake (1995). Its type is Fandasterias facetus. It is the type genus of Fandasteridae.
It was assigned to Asteroidea by Blake (1995); and to Fandasteridae by Blake and Elliott (2003) and Blake (2018).
It was assigned to Asteroidea by Blake (1995); and to Fandasteridae by Blake and Elliott (2003) and Blake (2018).
Species
F. facetus (type species)
Synonymy list
| Year | Name and author |
|---|---|
| 1995 | Fandasterias Blake p. 66 |
| 2003 | Fandasterias Blake and Elliott p. 487 |
| 2018 | Fandasterias Blake p. 45 |
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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 | |
|---|---|---|
| D. B. Blake 1995 | A Palaeozoic asteroid with a small disc and lon slender arms. A primary ossicular ring of large ossicles is present on the dorsal surface of the disc. Other dorsal ossicles are large and arranged in few regular rows, the rows lacking intercalated small ossicles. Podial basins are quadriseriate but podial passageways to the arm interior is absent; ambulacrals are somewhat compressed, and they are paired with (not offset from) the adambulacrals. Synapomorphic characters include the presence of superomarginals that are robust, elongate and sinuous, with disc superomarginals and perhaps interbrachials extending from the dorsal at least nearly to the ventral surface. Inferomarginals are robust, transversely elongate, and triangular. The radial column begins with two enlarged ossicles; the remainder of the series is bisserial and offset. | |
| D. B. Blake and D. R. Elliott 2003 | As for the family, by monotypy |