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Riasanites
Taxonomy
Riasanites is a genus. It is not extant. Its type is Ammonites rjasanensis.
It was assigned to Berriasellinae by Wright et al. (1996); and to Ammonoidea by Sepkoski (2002).
It was assigned to Berriasellinae by Wright et al. (1996); and to Ammonoidea by Sepkoski (2002).
Species
Species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1996 | Riasanites Wright et al. p. 50 |
| 2002 | Riasanites 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.
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: base of the Tithonian to the top of the Valanginian or 152.10000 to 132.90000 Ma
Collections (10 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Tithonian | Yemen (Wadi Hajar) | R. rjasanensis (2615) | |
| Early/Lower Berriasian | Czech Republic | R. swistowianus (202901) | |
| Berriasian | Poland | R. swistowianus, R. sp., R. rjasanensis (2094) | |
| Berriasian | Russian Federation | R. rjasanensis (2523 2524 2528) R. sp. (2511 2516) R. subrjasanensis, R. swistowianus, R. rjasanensis (2510) | |
| Valanginian | Russian Federation | R. subrjasanensis, R. swistowianus, R. rjasanensis (2515) |