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Hemiaster ungula
Taxonomy
Spatangus ungula was named by Morton (1833). It is a 3D body fossil. Its type locality is Deep Cut, Chesapeake and Delaware Canal (ANSP), which is in a Campanian marine sandstone in the Merchantville Formation of Delaware.
It was recombined as Hemiaster ungula by Clark and Twitchell (1915) and Cooke (1953).
It was recombined as Hemiaster ungula by Clark and Twitchell (1915) and Cooke (1953).
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1833 | Spatangus ungula Morton |
| 1915 | Hemiaster ungula Clark and Twitchell p. 93 |
| 1953 | Hemiaster ungula Cooke p. 34 figs. Pl 14, figs 10-14 |
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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 ungula Morton 1833
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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: base of the Late/Upper Campanian to the top of the Thanetian or 83.50000 to 56.00000 Ma
Collections (3 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Early/Lower Campanian | USA (Delaware) | Spatangus ungula (197712) | |
| Late/Upper Campanian | USA (Tennessee) | Hemiaster ungula (88357) | |
| Thanetian | USA (New Jersey) | Hemiaster ungula (3113) |