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Sanniolus sigmoides
Taxonomy
Sanniolus sigmoides was named by Sohn (1954). Its type specimen is USNM 118374 and is a 3D body fossil. Its type locality is USNM703c, Old Word Ranch, Glass Mountains, which is in a Kungurian slope limestone in the Road Canyon Formation of Texas. It is the type species of Sanniolus.
Entered
by M. Clapham on 2010-04-14
Synonymy list
| Year | Name and author |
|---|---|
| 1954 | Sanniolus sigmoides Sohn p. 18 figs. Pl 5, figs 9-13 |
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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.
†Sanniolus sigmoides Sohn 1954
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Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| valve height | 2 | 0.590 | 0.440 | 0.790 | 0.615 | 0.247 |
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| Source: o = order, c = class | |||||
| References: Alvarez et al. 2008, Kiessling 2004 | |||||
Age range: base of the Artinskian to the top of the Kungurian or 290.10000 to 274.40000 Ma
Collections (2 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Artinskian | USA (Texas) | Sanniolus sigmoides (117948) | |
| Kungurian | USA (Texas) | Sanniolus sigmoides (type locality: 43517) |