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Hemiaster arcolensis
Taxonomy
Hemiaster arcolensis was named by Cooke (1953). Its type specimen is USNM 108397 and is a 3D body fossil. Its type locality is Hayneville, Lowndes, which is in a Campanian marine horizon in the Mooreville Chalk Formation of Alabama.
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1953 | Hemiaster arcolensis Cooke p. 32 figs. Pl 12, figs 12-16 |
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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 arcolensis Cooke 1953
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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: Kiessling 2004, Aberhan 1992 | |||||
Age range: Middle Campanian or 83.50000 to 70.60000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Middle Campanian | USA (Alabama) | Hemiaster arcolensis (type locality: 78185) |