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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), Cooke (1953).
It was recombined as Hemiaster ungula by Clark and Twitchell (1915), 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