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Tretocycloecia
Taxonomy
Tretocycloecia was named by Canu (1910) [Sepkoski's age data: K Haut-l T Mi-u Sepkoski's reference number: 1048]. It is the type genus of Tretocycloeciidae.
It was assigned to Tretocycloeciidae by Bassler (1953); and to Cyclostomata by Sepkoski (2002).
It was assigned to Tretocycloeciidae by Bassler (1953); and to Cyclostomata by Sepkoski (2002).
Species
Species lacking formal opinion data
Synonymy list
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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. †Tretocycloecia Canu 1910
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Tretocycloecia distincta Kuehn 1955
†Tretocycloecia sabaudica Canu and Bassler 1922
Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: o = order, c = class, uc = unranked clade | |||||
| References: Smith et al. 2006, Nesnidal et al. 2013 | |||||
Age range
Maximum range based only on fossils: base of the Aptian to the top of the Serravallian or 121.40000 to 11.63000 Ma
Minimum age of oldest fossil (stem group age): 113.2 Ma
Minimum age of oldest fossil (stem group age): 113.2 Ma
Collections (5 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Aptian | United Kingdom (England) | T. densa (1854) | |
| Priabonian | USA (Mississippi) | T. grandis (84174) | |
| Langhian - Serravallian | Germany (Bayern) | T. helvetica (123151) | |
| Middle Miocene | Czechia | T. dichotoma (178887 178890) |