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Gnamptorhynchos
Taxonomy
Gnamptorhynchos was named by Jin (1989). It is not extant. Its type is Platystrophia regularis globata.
It was assigned to Orthida by Jin and Zhan (2000); and to Platystrophiidae by Williams et al. (2007).
It was assigned to Orthida by Jin and Zhan (2000); and to Platystrophiidae by Williams et al. (2007).
Synonymy list
| Year | Name and author |
|---|---|
| 1989 | Gnamptorhynchos Jin pp. 74-75 |
| 2000 | Gnamptorhynchos Jin and Zhan p. 986 |
| 2007 | Gnamptorhynchos Williams et al. p. 2692 |
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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. †Gnamptorhynchos Jin 1989
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†Gnamptorhynchos globatum Twenhofel 1928
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Invalid names: Gnamptorhynchos inversum Jin 1989 [synonym]
†Gnamptorhynchos manitobensis Jin and Zhan 2000
†Gnamptorhynchos orbiculoidea Jin and Chatterton 1997
†Gnamptorhynchos prayi Howe 1966
†Gnamptorhynchos rhynchonelliformis McEwan 1919
†Gnamptorhynchos selliseptalicium Jin 1989
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| J. Jin and R. Zhan 2000 | Medium to relatively large, strongly convex to globular shells with shortened hingeline, strong, angular to subangular costae, well-defined ventral sulcus and dorsal fold. Interareas prominent, apsacline. Delthyrium open. Dental plates well developed. Septalium-like notothyrial platform supported dorsally by one or two ridges; cardinal process bladelike, uni- or trilobate. |
Measurements
No measurements are available
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| Source: f = family, c = class, p = phylum, uc = unranked clade | |||||
| References: Aberhan et al. 2004, Hendy et al. 2009, Nesnidal et al. 2013 | |||||
Age range: base of the Maysvillian to the top of the Aeronian or 450.20000 to 438.50000 Ma
Collections (14 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Maysvillian | USA (Texas) | Platystrophia prayi (165280 165299) | |
| Maysvillian | Canada (Manitoba) | G. manitobensis (34813 166398) | |
| Richmondian | USA (Wyoming) | Platystrophia prayi (13497 65239) | |
| Richmondian | Canada (British Columbia) | G. sp. (166383) | |
| Hirnantian | Canada (Yukon) | G. orbiculoidea (234053) | |
| Hirnantian | Canada (Northwest Territories) | G. orbiculoidea (26070) Platystrophia orbiculoidea (26071) | |
| Hirnantian | Canada (Quebec) | G. globatum (158771 158773 160526) | |
| Aeronian | Canada (British Columbia) | G. sp. (12702) |