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Cravenoceras (Richardsonites)
Taxonomy
Cravenoceras (Richardsonites) was named by Elias (1956) [Sepkoski's age data: C Serp-l Sepkoski's reference number: 302,304]. Its type is Gastrioceras richardsonianum.
It was reranked as Richardsonites by Titus (2000), Sepkoski (2002), Korn (2006) and Furnish et al. (2009).
It was assigned to Cravenoceras by Elias (1956); to Goniatitida by Sepkoski (2002); to Glaphyritidae by Korn (2006); and to Glaphyritinae by Titus (2000) and Furnish et al. (2009).
It was reranked as Richardsonites by Titus (2000), Sepkoski (2002), Korn (2006) and Furnish et al. (2009).
It was assigned to Cravenoceras by Elias (1956); to Goniatitida by Sepkoski (2002); to Glaphyritidae by Korn (2006); and to Glaphyritinae by Titus (2000) and Furnish et al. (2009).
Synonymy list
| Year | Name and author |
|---|---|
| 1956 | Cravenoceras (Richardsonites) Elias p. 128 |
| 2000 | Richardsonites Titus p. 32 |
| 2002 | Richardsonites Sepkoski |
| 2006 | Richardsonites Korn |
| 2009 | Richardsonites Furnish et al. p. 80 |
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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. †Cravenoceras (Richardsonites) Elias 1956
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| A. L. Titus 2000 | Glaphyritids with short ophioconic (3rd or 4th
whorl) and cadiconic phases (D < 15 mm) and adults (D > 30 mm) with U/D ratios of 0.4 or less and a wide ventral lobe (one-third to twice as wide as first lateral lobe or saddle) with swollen, bluntly pointed prongs. |