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| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Helicodiscus paralellus
Taxonomy
Planorbis paralellus was named by Say (1821). It is extant.
It was recombined as Helicodiscus paralellus by Eshelman et al. (2025).
It was recombined as Helicodiscus paralellus by Eshelman et al. (2025).
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1821 | Planorbis paralellus Say |
| 2025 | Helicodiscus paralellus Eshelman et al. p. 72 |
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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.
Helicodiscus paralellus Say 1821
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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: base of the Irvingtonian to the top of the Late/Upper Pleistocene or 1.40000 to 0.01170 Ma
Collections (2 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Irvingtonian | USA (Kansas) | Helicodiscus paralellus (20352) | |
| Late/Upper Pleistocene (high glacial) | USA (Texas) | Helicodiscus paralellus (93103) |