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| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Anazyga aequivalvis
Taxonomy
Zygospira recurvirostris aequivalvis was named by Twenhofel (1928).
It was recombined as Zygospira aequivalvis by Macomber (1970); it was recombined as Anazyga aequivalvis by Copper (1981), Copper (1981).
It was recombined as Zygospira aequivalvis by Macomber (1970); it was recombined as Anazyga aequivalvis by Copper (1981), Copper (1981).
Sister species lacking formal opinion data
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.
†Anazyga aequivalvis Twenhofel 1928
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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, p = phylum, uc = unranked clade | |||||
| References: Aberhan et al. 2004, Hendy 2009, Nesnidal et al. 2013, Meyer et al. 2009 | |||||
Age range: base of the Ashgill to the top of the Richmondian or 449.50000 to 445.50000 Ma
Collections (3 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Richmondian | USA (Wyoming) | Zygospira aequivalvis (13497 65239) | |
| Ashgill | Canada (Québec) | Anazyga aequivalvis (24584) |