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Lithacoceras (Progeronia)
Taxonomy
Progeronia was named as a genus. It is not extant.
It was reranked as Lithacoceras (Progeronia) by Geyer (1961).
It was assigned to Perisphinctinae by Arkell et al. (1957); to Lithacoceras by Geyer (1961); and to Ammonoidea by Sepkoski (2002).
It was reranked as Lithacoceras (Progeronia) by Geyer (1961).
It was assigned to Perisphinctinae by Arkell et al. (1957); to Lithacoceras by Geyer (1961); and to Ammonoidea by Sepkoski (2002).
Subtaxa
Species lacking formal opinion data
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1850 | Ammonites eupalus d'Orbigny p. 555 figs. Pl. 217, fig. 1, 2 |
| 1957 | Progeronia Arkell et al. p. L321 |
| 1961 | Lithacoceras (Progeronia) Geyer |
| 2002 | Progeronia Sepkoski |
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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.
Subg. †Lithacoceras (Progeronia)
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Invalid names: Ammonites eupalus d'Orbigny 1850 [nomen oblitum]
Diagnosis
No diagnoses are available