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Helisoma trivolvis (marsh rams-horn)
Taxonomy
Planorbis trivolvis was named by Say (1817). It is extant.
It was recombined as Helisoma trivolvis by Willett (1937).
It was recombined as Helisoma trivolvis by Willett (1937).
Synonymy list
| Year | Name and author |
|---|---|
| 1817 | Planorbis trivolvis Say |
| 1937 | Helisoma trivolvis Willett p. 404 |
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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.
Helisoma trivolvis Say 1817 [marsh rams-horn]
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Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: f = family, c = class | |||||
| References: Bush and Bambach 2015, Kiessling 2004 | |||||
Age range: base of the Middle Pleistocene to the top of the Late/Upper Pleistocene or 0.77400 to 0.01170 Ma
Collections (8 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Irvingtonian | USA (Kansas) | Helisoma trivolvis (20293) | |
| Middle Pleistocene | USA (California) | Planorbis trivolvis (138723) | |
| Late/Upper Pleistocene (late glacial) | USA (Texas) | Helisoma trivolvis (93554) | |
| Late/Upper Pleistocene (high glacial) | USA (Texas) | Helisoma trivolvis (93103) | |
| Late/Upper Pleistocene | USA (California) | Helisoma trivolvis (59063 160361 219029 219030) |