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Persephonaster arduennensis
Taxonomy
Persephonaster arduennensis was named by Breton (1997). Its type specimen is Holotype MHNH 8983 and is a 3D body fossil. Its type locality is Asteroidea, Lumachelle à Acuminata, Ardennes, which is in a Bajocian shoreface grainstone in the Lumachelle à Ostrea acuminata Formation of France.
Synonymy list
| Year | Name and author |
|---|---|
| 1997 | Persephonaster arduennensis Breton pp. 26-33 figs. figs. 1-6 |
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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.
†Persephonaster arduennensis Breton 1997
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| G. Breton 1997 | Disk small. Short slender arms regularly attenuated. Interbrachial arc angular. R/r ratio higher than five. Thirty-five pairs of marginal per half-arc. No fasciole between marginal plates. Two pairs of interradial marginals differentiated. Marginals nearly equal in size. Inferomarginals with ornament of several acicular spines inserted on a distal and oblique row of tubercles. Ventrolateral area very reduced, a discontinuous row of vestigial actinolateral plates can reach the third of the arm length. Adambulacrals with a large horseshoe-shaped subambulacral tubercle. Furrow margin of the adambulacrals with a pectinate group of four to six cylindrical spines. Adambulacrals with a well-developed adradial keel. Articulation of the adambulacrals and ambulacrals symmetrical. Ambulacral weakly overlapping. Orals small. |
Measurements
No measurements are available
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| Source: f = family, c = class, p = phylum | |||||
| References: Aberhan et al. 2004, Blake 1990, 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 | France | Persephonaster arduennensis (type locality: 59773) |