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| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Platytrochalos
Taxonomy
Platytrochalos was named by Jin (1989). Its type is Platytrochalos crudicostatus.
It was assigned to Leptocoeliidae by Williams et al. (2002).
It was assigned to Leptocoeliidae by Williams et al. (2002).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 1989 | Platytrochalos Jin pp. 106-107 |
| 2002 | Platytrochalos Williams et al. p. 1083 |
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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. †Platytrochalos Jin 1989
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†Platytrochalos crudicostatus Jin 1989
†Platytrochalos peninversus Jin 1989
†Platytrochalos pulvinatus Jin 1989
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| A. Williams et al. 2002 | Small to medium with subcircular outline and weakly biconvex profile, but with high anterior fold. Beak erect to incurved; delthyium open; foramen small, mesothyrid. Dorsal fold and ventral sulcus narrow, strong anteriorly; anterior commissure sulciplicate. Costae strong, simple, rounded, arising at beaks. Dental plates fused to shell walls; teeth small; short, low ventral median ridge developed posteriorly; ventral muscle field weakly impressed. Hinge plates sessile; cardinal process and dorsal median septum absent; crural bases stout, arising from sessile hinge plates at hinge line; crural bases triangular in section; crura thick and laterally flattened, tapering distally |
Measurements
No measurements are available
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| Source: f = family, c = class, p = phylum, uc = unranked clade | |||||
| References: Nesnidal et al. 2013, Hendy et al. 2009, Aberhan et al. 2004 | |||||
Age range: base of the Rhuddanian to the top of the Telychian or 443.10000 to 432.90000 Ma
Collections (11 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Rhuddanian | Canada (Quebec) | P. peninversus (158623 158624) | |
| Aeronian | Canada (Quebec) | P. crudicostatus (184854) P. peninversus (158614 158617 158620 158793) P. peninversus, P. pulvinatus (158601) P. sp. (184853) | |
| Telychian | Canada (Quebec) | P. crudicostatus (158723 158730) |