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Platyceras (Orthonychia) compressum
Taxonomy
Orthonychia compressa was named by Girty (1910). Its type specimen is USNM 161316, a shell, and it is not a trace fossil. Its type locality is locality 1099M. West side of Edmunds Hill, Chapman Township, which is in a Lochkovian delta front sandstone in the Chapman Sandstone Formation of Maine.
It was recombined as Platyceras (Orthonychia) compressum by Yochelson (1969).
It was recombined as Platyceras (Orthonychia) compressum by Yochelson (1969).
Sister species lacking formal opinion data
Synonymy list
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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 (Orthonychia) compressum Girty 1910
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Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: g = genus, c = class | |||||
| References: Ohern and Maynard 1913, Kiessling 2004 | |||||
Age range: base of the Late/Upper Emsian to the top of the Meramecian or 402.50000 to 335.50000 Ma
Collections (3 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Late/Upper Emsian | Austria | Platyceras compressum (26221) | |
| Meramecian | USA (Arkansas) | Platyceras compressum (76651) | |
| Brigantian | USA (Arkansas) | Platyceras compressum (76143) |