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Picnotreta
Taxonomy
Picnotreta was named by Henderson and MacKinnon (1981) [Sepkoski's age data: Cm m Cm u Sepkoski's reference number: 538]. 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
Species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1981 | Picnotreta Henderson and MacKinnon |
| 2000 | Picnotreta Williams et al. p. 118 |
| 2002 | Picnotreta 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. †Picnotreta Henderson and MacKinnon 1981
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†Picnotreta debilis Henderson and MacKinnon 1981
†Picnotreta karakichiensis Holmer et al. 2001
†Picnotreta robusta Holmer et al. 1999
Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: g = genus, o = order, c = class, uc = unranked clade | |||||
| References: Nesnidal et al. 2013, Hendy 2009, Aberhan et al. 2004 | |||||
Age range: base of the Boomerangian to the top of the Arcadian or 500.50000 to 498.40000 Ma
Collections (15 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Arcadian | Canada (Newfoundland and Labrador) | P. laphocarita, P. robusta (10768) | |
| St Davids | Argentina (Mendoza) | P. robusta (55945) | |
| St Davids | Canada (Alberta) | P. debilis (49208) P. robusta (49203) | |
| Mayan | Kazakhstan (Balkhash) | P. karakichiensis (118101 118217 121001) | |
| Menevian | USA (Nevada) | P. lophocracenta (64025) | |
| Marjumian | Greenland (Peary Land) | P. sp. (49453) | |
| Mayan - Furongian | Kyrgyzstan | P. karakichiensis (122853) | |
| Boomerangian | New Zealand (Nelson) | P. debilis (49850) | |
| Mindyallan - Idamean | Australia (Victoria) | P. sp. (64051 64052) P. sp., P. debilis (64043 64047) |