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Zonovia (Xenostephanoides)
Taxonomy
Aulacostephanus (Xenostephanoides) was named by Arkell and Callomon (1963).
It was Zonovia (Xenostephanoides) by Mesezhnikov (1984).
It was assigned to Aulacostephanus by Arkell and Callomon (1963); and to Zonovia by Mesezhnikov (1984).
It was Zonovia (Xenostephanoides) by Mesezhnikov (1984).
It was assigned to Aulacostephanus by Arkell and Callomon (1963); and to Zonovia by Mesezhnikov (1984).
Synonymy list
| Year | Name and author |
|---|---|
| 1963 | Aulacostephanus (Xenostephanoides) Arkell and Callomon |
| 1984 | Zonovia (Xenostephanoides) Mesezhnikov p. 120 |
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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. †Zonovia (Xenostephanoides) Arkell and Callomon 1963
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†Zonovia (Xenostephanoides) thurrelli Arkell and Callomon 1963
Diagnosis
No diagnoses are available
Measurements
| part | N | mean | |||||
|---|---|---|---|---|---|---|---|
| shell height | 1 | 12.0 | |||||
| shell diameter | 1 | 37.0 | |||||
| shell inflation | 1 | 17.0 |
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| Source: o = order, c = class | |||||
| References: Kiessling 2003, Kiessling 2004 | |||||
Age range: Early/Lower Kimmeridgian or 155.70000 to 150.80000 Ma
Collections (2 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Early/Lower Kimmeridgian | Russian Federation (Krasnoyarsk) | Zonovia thurrelli (164312 164316) |