| Basic info | Taxonomic history | Classification | Included Taxa |
| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Ristola firma
Taxonomy
Ristola firma was named by Hull (1995). It is not extant.
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1995 | Ristola firma Hull |
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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.
†Ristola firma Hull 1995
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Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: p = phylum | |||||
| Reference: Kiessling 1999 | |||||
Age range: base of the Early/Lower Oxfordian to the top of the Late/Upper Tithonian or 161.50000 to 143.10000 Ma
Collections (3 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Early/Lower Oxfordian - Middle Oxfordian | Mexico (San Luis Potosi) | Ristola firma (50755 50756) | |
| Late/Upper Tithonian | Japan | Ristola firma (131593) |