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Hildoceras bifrons
Taxonomy
Ammonites bifrons was named by Bruguiere (1792). It is not extant.
It was recombined as Hildoceras bifrons by Guex (1972), Howarth (1992), Géczy and Szente (2006), Bécaud (2006), Delsate and Weis (2010), Benzaggagh et al. (2022).
It was recombined as Hildoceras bifrons by Guex (1972), Howarth (1992), Géczy and Szente (2006), Bécaud (2006), Delsate and Weis (2010), Benzaggagh et al. (2022).
Sister species lacking formal opinion data
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1792 | Ammonites bifrons Bruguiere |
| 1815 | Ammonites walcotii Sowerby p. 7 figs. Pl 106 |
| 1822 | Ammonites hildensis Young and Bird p. 254 figs. Pl 12, fig 1 |
| 1828 | Ammonites hildensis Young p. 254 figs. Pl 12, fig 1 |
| 1844 | Ammonites bifrons d'Orbigny p. 219 |
| 1904 | Hildoceras angustisiphonatum Prinz |
| 1972 | Hildoceras angustisiphonatum Guex figs. Pl 6, fig 3 |
| 1972 | Hildoceras bifrons Guex figs. Pl 6, fig 7; pl 7, fig 8 |
| 1992 | Hildoceras bifrons Howarth p. 184 figs. Pl 36, fig 4; pl 37, figs 1-10; pl 38, figs 3,7; text-fig 10D |
| 2006 | Hildoceras bifrons Bécaud p. 90 figs. Pl 47, figs 1,3 |
| 2006 | Hildoceras angustisiphonatum Géczy and Szente figs. Pl 2, fig 3 |
| 2006 | Hildoceras bifrons Géczy and Szente figs. Pl 2, figs 4,5 |
| 2010 | Hildoceras bifrons Delsate and Weis figs. Pl 2, fig 6 |
| 2022 | Hildoceras bifrons Benzaggagh et al. p. 16 figs. 12F-J |
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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.
†Hildoceras bifrons Bruguiere 1792
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Invalid names: Ammonites hildensis Young and Bird 1822 [synonym], Ammonites walcotii Sowerby 1815 [synonym], Hildoceras angustisiphonatum Prinz 1904 [synonym]
Diagnosis
No diagnoses are available