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Perisseiasphaeridium
Taxonomy
Perisseiasphaeridium was named by Davey and Williams (1966). It is not extant.
It was assigned to Gonyaulacaceae by Davey and Williams (1966).
It was assigned to Gonyaulacaceae by Davey and Williams (1966).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 1966 | Perisseiasphaeridium Davey and Williams |
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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. †Perisseiasphaeridium Davey and Williams 1966
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†Perisseiasphaeridium inusitatum Stevens and Helby 1987
†Perisseiasphaeridium pannosum Davey and Williams 1966
Diagnosis
No diagnoses are available
Measurements
No measurements are available
No ecological data are available
Age range: Late/Upper Valanginian or 140.20000 to 136.40000 Ma
Collections (2 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Early/Lower Valanginian | Russian Federation | P. sp. (65748) | |
| Late/Upper Valanginian | Russian Federation | P. sp. (65751) |