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Amictocracens
Taxonomy
Amictocracens was named by Henderson and MacKinnon (1981) [Sepkoski's age data: Cm uMid-l Cm uMid-u Sepkoski's reference number: 569]. It is not extant.
It was assigned to Acrotretidae by Williams et al. (2000); and to Acrotretida by Sepkoski (2002).
It was assigned to Acrotretidae by Williams et al. (2000); and to Acrotretida by Sepkoski (2002).
Species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1981 | Amictocracens Henderson and MacKinnon |
| 2000 | Amictocracens Williams et al. p. 104 |
| 2002 | Amictocracens Sepkoski |
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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. †Amictocracens Henderson and MacKinnon 1981
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Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: o = order, c = class, uc = unranked clade | |||||
| References: Nesnidal et al. 2013, Aberhan et al. 2004 | |||||
Age range: Boomerangian or 500.50000 to 499.00000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Boomerangian | New Zealand (Nelson) | A. teres (49850) |