| Basic info | Taxonomic history | Classification | Included Taxa |
| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Sphaerexochus johnstoni
Taxonomy
Sphaerexochus johnstoni was named by Chatterton and Perry (1984).
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1984 | Sphaerexochus johnstoni Chatterton and Perry |
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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.
†Sphaerexochus johnstoni Chatterton and Perry 1984
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Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: g = genus, f = family, c = class | |||||
| References: Aberhan et al. 2004, Hendy 2009, Harrington et al. 1959 | |||||
Age range: Whitwellian or 430.50000 to 425.40000 Ma
Collections (3 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Wenlock - Ludlow | Canada (Northwest Territories) | Sphaerexochus johnstoni (26049 26051) | |
| Whitwellian | Canada (Northwest Territories) | Sphaerexochus johnstoni (26048) |