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Cleiothyridina ciriacksi
Taxonomy
Cleiothyridina ciriacksi was named by Cooper and Grant (1976). Its type specimen is USNM 154386h, a shell (Articulated shell), and it is not a trace fossil. Its type locality is USNM763, Big Sheep Canyon, Beaverhead County, which is in a Wuchiapingian open shallow subtidal limestone in the Park City Formation of Montana.
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1976 | Cleiothyridina ciriacksi Cooper and Grant p. 2135 figs. Pl 650, figs 1-18 |
| 1978 | Cleiothyridina ciriacksi Yancey p. 297 figs. Pl 4, figs 8-10 |
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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.
†Cleiothyridina ciriacksi Cooper and Grant 1976
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Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 8 | 5.16 | 3.20 | 6.60 | 5.30 | 1.04 |
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| Source: subo = suborder, c = class, p = phylum, uc = unranked clade | |||||
| References: Nesnidal et al. 2013, Aberhan et al. 2004 | |||||
Age range: base of the Artinskian to the top of the Wuchiapingian or 290.10000 to 254.17000 Ma
Collections (4 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Artinskian | USA (Nevada) | Cleiothyridina ciriacksi (10471 120956) | |
| Kungurian | USA (Nevada) | Cleiothyridina ciriacksi (10640) | |
| Wuchiapingian | USA (Montana) | Cleiothyridina ciriacksi (type locality: 105516) |