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Atrypina simpsoni
Taxonomy
Atrypina simpsoni was named by Johnson (1970). Its type specimen is USNM 157073, a valve, and it is a 3D body fossil. Its type locality is USNM 10758. Big ledge, east flank and near mouth of Coal Canyon, which is in a Siegen carbonate limestone in the Windmill Limestone Formation of Nevada.
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1970 | Atrypina simpsoni Johnson pp. 159 - 160 figs. Pl. 43, figs. 5-16 |
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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.
†Atrypina simpsoni Johnson 1970
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| J. G. Johnson 1970 | Small pentagonal Atrypina with a nearly straight hinge line and lacking a median rib on the fold of the pedicle valve. |
Measurements
No measurements are available
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| Source: g = genus, o = order, c = class, p = phylum, uc = unranked clade | |||||
| References: Aberhan et al. 2004, Hendy 2009, Nesnidal et al. 2013 | |||||
Age range: base of the Lochkovian to the top of the Pragian or 419.62000 to 410.62000 Ma
Collections (4 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Lochkovian | China (Guangxi) | Atrypina simpsoni (41058) | |
| Pragian | Canada (Yukon) | Atrypina simpsoni (24933) | |
| Siegen | USA (Nevada) | Atrypina simpsoni (type locality: 164726 164730) |