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| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Helminthoglyptinae (shoulderband snails)
Taxonomy
Helminthoglyptinae was named by Pilsbry (1939). It is extant. Its type is Helminthoglypta.
It was assigned to Xanthonychidae by Marshall et al. (2025).
It was assigned to Xanthonychidae by Marshall et al. (2025).
Subtaxa
Helminthoglypta (type genus)
Synonymy list
| Year | Name and author |
|---|---|
| 1939 | Helminthoglyptinae Pilsbry |
| 2025 | Helminthoglyptinae Marshall et al. |
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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.
Subfm. Helminthoglyptinae Pilsbry 1939 [shoulderband snails]
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G. Helminthoglypta Ancey 1887
Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: c = class | |||||
| Reference: Kiessling 2004 | |||||
Age range
Maximum range based only on fossils: base of the Uintan to the top of the Hemphillian or 45.90000 to 4.70000 Ma
Minimum age of oldest fossil (stem group age): 39.7 Ma
Minimum age of oldest fossil (stem group age): 39.7 Ma
Collections (2 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Uintan | USA (California) | Helminthoglypta stocki (16786) | |
| Hemphillian | USA (California) | Helminthoglypta sp. (19447) |