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Geyerella hessi
Taxonomy
Geyerella hessi was named by Cooper and Grant (1974). Its type specimen is USNM 152605a, a shell (Articulated shell), and it is not a trace fossil.
Synonymy list
| Year | Name and author |
|---|---|
| 1974 | Geyerella hessi Cooper and Grant pp. 378-380 figs. Pl 89, figs 2-4; pl 121, figs 1-24; pl 122, figs 1-10; pl 123, figs 1-21; pl 124, figs 14-20; pl 671 |
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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.
†Geyerella hessi Cooper and Grant 1974
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Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 11 | 39.1 | 12.9 | 77.3 | 52.8 | 22.8 |
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| Source: 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 Kungurian or 290.10000 to 274.40000 Ma
Collections (26 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Artinskian | USA (Texas) | Geyerella hessi (43531 43559 43579 43580 43588 43612 44509 75887 75931 75933 105685) | |
| Artinskian - Kungurian | USA (Texas) | Geyerella hessi (105929) | |
| Kungurian | USA (Texas) | Geyerella hessi (43534 43558 43560 43565 75862 75923 75924 105689 105724 105725 105727 105818 105819 106013) |