| Basic info | Taxonomic history | Classification | Included Taxa |
| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Cadoceras (Paracadoceras) tonniense
Taxonomy
Cadoceras (Paracadoceras) tonniense was named by Imlay (1953). Its type specimen is USNM 108088, a shell, and it is a 3D body fossil. Its type locality is USGS Mesozoic 21340, Iniskin Peninsula, which is in a Callovian marine siliciclastic in the Chinitna Formation of Alaska.
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1953 | Cadoceras (Paracadoceras) tonniense Imlay p. 88 figs. Pl 43, figs 9-11,13 |
| 1993 | Cadoceras (Paracadoceras) tonniense Arthur et al. p. 40 figs. Pl 5, figs 6-9 |
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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.
†Cadoceras (Paracadoceras) tonniense Imlay 1953
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Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 6 | 22.8 | 13.3 | 40.0 | 23.6 | 9.60 | |
| shell diameter | 6 | 56.1 | 31.7 | 92.0 | 61.9 | 21.8 | |
| shell inflation | 6 | 14.3 | 9.40 | 24.0 | 15.2 | 5.28 |
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| Source: o = order, c = class | |||||
| References: Kiessling 2003, Kiessling 2004 | |||||
Age range: Callovian or 165.30000 to 161.50000 Ma
Collections (10 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Callovian | USA (Alaska) | Cadoceras tonniense (158665 type locality: 158696 158700 158701 158703 158705 158884 158885 158887) | |
| Early/Lower Callovian | Canada (British Columbia) | Cadoceras tonniense (185051) |