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Keithia
Taxonomy
Keithia was named by Raymond (1924) [Sepkoski's age data: Cm Trep]. It is not extant.
It was assigned to Ptychaspididae by Jell and Adrain (2002); and to Asaphida by Sepkoski (2002).
It was assigned to Ptychaspididae by Jell and Adrain (2002); and to Asaphida by Sepkoski (2002).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 1924 | Keithia Raymond |
| 2002 | Keithia Jell and Adrain p. 392 |
| 2002 | Keithia 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.
G. †Keithia Raymond 1924
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†Keithia similis Rasetti 1944
†Keithia subclavatus Billings 1860
Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: g = genus, f = family, o = order, c = class | |||||
| References: Hendy 2009, Hendy et al. 2009, Aberhan et al. 2004, Whittington et al. 1997 | |||||
Age range: base of the Dolgellian to the top of the Sunwaptan or 490.20000 to 488.90000 Ma
Collections (17 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Merioneth | USA (Vermont) | K. schucherti (6871 8976) | |
| Sunwaptan | Canada (Newfoundland and Labrador) | K. schucherti (81269 81270 81271 81272) K. subclavata (81285 81286) | |
| Dolgellian | Canada (Quebec) | K. subclavata (8933 8934) | |
| Trempealeauan | Canada (Quebec) | K. similis (224137) K. subclavata (224138 224139 224140 224141 224144 224150) |