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Taxonomy
Cardium (Ringicardium) was named by Fischer (1887).
It was reranked as Ringicardium by Hendy et al. (2008).
It was assigned to Cardium by Fischer (1887), Clark and Woodford (1927), Olsson (1928); and to Cardiidae by Hendy et al. (2008).
It was reranked as Ringicardium by Hendy et al. (2008).
It was assigned to Cardium by Fischer (1887), Clark and Woodford (1927), Olsson (1928); and to Cardiidae by Hendy et al. (2008).
Subtaxa
Species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1887 | Cardium (Ringicardium) Fischer |
| 1927 | Cardium (Pingecardium) Clark and Woodford p. 94 |
| 1928 | Cardium (Ringicardium) Olsson p. 77 |
| 2008 | Ringicardium Hendy et al. |
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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.
G. †Ringicardium Fischer 1887
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†Ringicardium restinense Olsson 1928
Ringicardium ringens Bruguière 1789
Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: f = family, c = class | |||||
| References: Todd 2001, Aberhan et al. 2004 | |||||
Age range
Maximum range based only on fossils: base of the Lutetian to the top of the Chattian or 48.07000 to 23.04000 Ma
Minimum age of oldest fossil (stem group age): 41.03 Ma
Minimum age of oldest fossil (stem group age): 41.03 Ma
Collections (14 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Lutetian | USA (Texas) | Cardium harrisi (205470) | |
| Lutetian | USA (Alabama) | Cardium harrisi (1435 81253 81255) | |
| Bartonian | USA (Arkansas) | Cardium harrisi (99172) | |
| Bartonian | USA (Louisiana) | Cardium harrisi (98645 98947) | |
| Bartonian | USA (Alabama) | Cardium harrisi (90469 98355) | |
| Bartonian | USA (Georgia) | Cardium harrisi (90640) | |
| Bartonian | Peru (Piura) | Cardium restinense (88362 88370 88372) | |
| Chattian | Hungary | R. buekkianum (8211) |