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Helicotoma planulatoides
Taxonomy
Helicotoma planulatoides was named by Ulrich and Scofield (1897) [Helicotoma planulatoides Ulrich in Ulrich & Scofield 1897]. It is not extant. Its type locality is High Bridge, Tyrone Fm., which is in a Rocklandian shallow subtidal limestone in the Tyrone Limestone Formation of Kentucky.
Synonymy list
| Year | Name and author |
|---|---|
| 1897 | Helicotoma planulatoides Ulrich and Scofield |
| 1924 | Helicotoma planulatoides Foerste p. 216 |
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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.
†Helicotoma planulatoides Ulrich and Scofield 1897
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Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: g = genus, c = class | |||||
| References: Wagner 2023, Kiessling 2004 | |||||
Age range: Rocklandian or 457.30000 to 449.60000 Ma
Collections (3 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Rocklandian | USA (Kentucky) | Helicotoma planulatoides (87737 type locality: 87739) | |
| Rocklandian | USA (Tennessee) | Helicotoma planulatoides (5346) |