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Cardioceras cordatum
Taxonomy
Ammonites cordatus was named by Sowerby (1813). Its type specimen is BMNH 43980b and is a 3D body fossil. It is the type species of Cardioceras, Cardioceras (Cardioceras).
It was recombined as Cardioceras (Cardioceras) cordatum by Schlegelmilch (1994); it was recombined as Cardioceras cordatum by Jantschke et al. (2025).
It was recombined as Cardioceras (Cardioceras) cordatum by Schlegelmilch (1994); it was recombined as Cardioceras cordatum by Jantschke et al. (2025).
Sister species lacking formal opinion data
C. alternans, C. alternoides, C. bauhini, C. castellatum, C. delicatum, C. mauntjoi, C. nathorsti, C. percaelatum, C. quadrarium, C. s.s., C. subangulata, C. alternoides, C. cordatiforme, C. girardoti, C. persecans, C. korys, C. kokeni, C. popilaniense, C. popilianense, C. tenuistriatum, C. carniferum, C. moderatum, C. alphacordatum, C. obliteratum, C. reesidei, C. sequanicum, C. subexcavatum, C. costulosum, C. sowerbyi, C. zenaidae, C. quadrarium, C. sequanicum
Synonymy list
| Year | Name and author |
|---|---|
| 1813 | Ammonites cordatus Sowerby |
| 1994 | Cardioceras (Cardioceras) cordatum Schlegelmilch p. 25 |
| 2025 | Cardioceras cordatum Jantschke et al. p. 19 figs. Pl 1, figs 1-10 |
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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.
†Cardioceras cordatum Sowerby 1813
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Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: o = order, c = class | |||||
| References: Kiessling 2003, Kiessling 2004 | |||||
Age range: Oxfordian or 161.50000 to 154.80000 Ma
Collections (7 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Early/Lower Oxfordian | Russian Federation | Cardioceras cordatum (58825) | |
| Early/Lower Oxfordian | Germany | Cardioceras cordatum (240349) | |
| Early/Lower Oxfordian | France | Cardioceras cordatum (12284) | |
| Oxfordian | Russian Federation | Cardioceras cordatum (198938) | |
| Oxfordian | United Kingdom (England) | Ammonites cordatus (100669) | |
| Oxfordian | Svalbard and Jan Mayen | Cardioceras cordatum (212008) | |
| Oxfordian | United Kingdom (Scotland) | Cardioceras cordatum (163719) |