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Hemiaster arcticus
Taxonomy
Hemiaster arcticus was named by Shmidt (1976). It is a 3D body fossil. Its type locality is Olen'i Roga tract, Tanama River, which is in a Santonian marine phosphorite in the Russian Federation.
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1976 | Hemiaster arcticus Shmidt p. 155 figs. Pl 1, fig 7 |
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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.
†Hemiaster arcticus Shmidt 1976
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Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: o = order, c = class, p = phylum | |||||
| References: Aberhan 1992, Kiessling 2004 | |||||
Age range: Late/Upper Santonian or 85.80000 to 83.50000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Late/Upper Santonian | Russian Federation | Hemiaster arcticus (type locality: 196495) |