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Platyceras yochelsoni
Taxonomy
Platyceras (Platyceras) yochelsoni was named by Kulas and Batten (1997) [Platyceras (Platyceras) yochelsoni Kulas & Batten 1997]. Its type specimen is UW A2898a, a shell, and it is a 3D body fossil. Its type locality is AMNH B72212a, Grinnetts Gulch, Lander, which is in a Wuchiapingian marine lime mudstone/grainstone in the Park City Formation of Wyoming.
It was recombined as Platyceras yochelsoni by Wagner (2023).
It was recombined as Platyceras yochelsoni by Wagner (2023).
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1997 | Platyceras (Platyceras) yochelsoni Kulas and Batten pp. 46 - 48 figs. pl. 3 f. 3A-B |
| 2023 | Platyceras yochelsoni Wagner p. 3773 |
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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.
†Platyceras yochelsoni Kulas and Batten 1997
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| H. A. Kulas and R. L. Batten 1997 | Thin-shelled gastropods of approximately three whorls; shell almost planispiral: all whorls coiled in contact; rapid whorl expansion rate; depressed apex; aperture subcircular; inner lip thickened and reflexed; flattened columellar lip partially covering umbilicus; hemiomphalus.
Ornament of regular, straight growth lines or weak collabral elements; rare specimens with faint, closely spaced spiral threads. |
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 2 | 4.50 | 4.50 | 4.50 | 4.50 | - |
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| Source: g = genus, f = family, superf = superfamily, c = class | |||||
| References: Kiessling 2004, Batten 1984, Aberhan et al. 2004, Knight et al. 1960 | |||||
Age range: base of the Roadian to the top of the Wuchiapingian or 272.30000 to 254.17000 Ma
Collections (5 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Roadian | USA (Wyoming) | Platyceras yochelsoni (61938) | |
| Wuchiapingian | USA (Wyoming) | Platyceras yochelsoni (61948 type locality: 61951 82181) | |
| Lopingian | USA (Wyoming) | Platyceras yochelsoni (82180) |