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Orthonema illineatus
Taxonomy
Orthonema illineatus was named by Erwin (1988). Its type specimen is USNM 400683, a shell, and it is not a trace fossil. Its type locality is USNM712a, Elwood Siding, Orogrande, which is in an Artinskian shallow subtidal limestone in the Hueco Formation of New Mexico.
Synonymy list
| Year | Name and author |
|---|---|
| 1988 | Orthonema illineatus Erwin p. 569 figs. 1.5 - 1.9 |
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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.
†Orthonema illineatus Erwin 1988
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Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 2 | 12.7 | 8.75 | 18.5 | 13.6 | 6.89 |
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| Source: c = class | |||||
| Reference: Kiessling 2004 | |||||
Age range: Artinskian or 290.10000 to 283.30000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Artinskian | USA (New Mexico) | Orthonema illineatus (type locality: 101795) |