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Helix evanstonensis
Taxonomy
Helix evanstonensis was named by White (1878).
It was recombined as Gastrodonta evanstonensis by Cockerell and Henderson (1912); it was recombined as Hendersonia evanstonensis by Gingerich (1987).
It was recombined as Gastrodonta evanstonensis by Cockerell and Henderson (1912); it was recombined as Hendersonia evanstonensis by Gingerich (1987).
Subspecies
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1878 | Helix evanstonensis White p. 714 |
| 1912 | Gastrodonta evanstonensis Cockerell and Henderson p. 231 |
| 1987 | Hendersonia evanstonensis Gingerich p. 293 |
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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.
†Helix evanstonensis White 1878
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†Gastrodonta evanstonensis sinclairi Cockerell 1912
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Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: c = class | |||||
| Reference: Kiessling 2004 | |||||
Age range: Early/Lower Eocene or 55.80000 to 48.60000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Early/Lower Eocene | USA (Wyoming) | Hendersonia evanstonensis, Grangerella sinclairi (15081) |