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Istreites
Taxonomy
Istreites was named by Simionescu (1913) [Sepkoski's age data: Tr Ladi-l Sepkoski's reference number: 302]. Its type is Istreites ptychitiformis.
It was assigned to Joannitidae by Spath (1951); to Ptychitidae by Tozer (1981) and Tozer (1994); and to Ceratitida by Sepkoski (2002).
It was assigned to Joannitidae by Spath (1951); to Ptychitidae by Tozer (1981) and Tozer (1994); and to Ceratitida by Sepkoski (2002).
Species
I. nanuk, I. ptychitiformis (type species)
Synonymy list
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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. †Istreites Simionescu 1913
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†Istreites nanuk Tozer 1961
†Istreites ptychitiformis Simionescu 1913
Diagnosis
No diagnoses are available
Measurements
| part | N | mean | |||||
|---|---|---|---|---|---|---|---|
| shell diameter | 1 | 52.0 |
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| Source: o = order, c = class | |||||
| References: Kiessling 2003, Kiessling 2004 | |||||
Collections (15 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Anisian | Svalbard and Jan Mayen | Ptychites nanuk (212078 212092 212093 212140 212142 212143 212144 212147) | |
| Ladinian | Canada (Nunavut) | I. nanuk (57095 137149 137150 137151 137152 137153 137954) |