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| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Croixana
Taxonomy
Croixana was named by Nelson (1951) [Sepkoski's age data: Cm Fran-l Cm Fran-u Sepkoski's reference number: 488]. It is not extant.
It was assigned to Ptychopariida by Sepkoski (2002); and to Parabolinoididae by Jell and Adrain (2002).
It was assigned to Ptychopariida by Sepkoski (2002); and to Parabolinoididae by Jell and Adrain (2002).
Species
Species lacking formal opinion data
Entered
by J. Sepkoski on 2003-01-23; modified by D. van Oyen on 2013-04-30
Synonymy list
| Year | Name and author |
|---|---|
| 1951 | Croixana Nelson |
| 2002 | Croixana Jell and Adrain p. 361 |
| 2002 | Croixana Sepkoski |
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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.
Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: f = family, c = class | |||||
| References: Whittington et al. 1997, Aberhan et al. 2004 | |||||
Age range: Sunwaptan or 493.50000 to 488.90000 Ma
Collections (9 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Franconian | USA (Montana) | C. bipunctata (249 137830) C. sp. (247) | |
| Franconian | USA (Idaho) | C. sp. (184601) | |
| Sunwaptan | USA (Oklahoma) | C. bipunctata (240505) | |
| Sunwaptan | Canada (Alberta) | C. ambigua (81296) C. ambigua, C. inflata (54091 64687) C. inflata (81299) |