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Anazyginae
Taxonomy
Anazyginae was named by Davidson (1883). Its type is Anazyga.
It was assigned to Anazygidae by Williams et al. (2002).
It was assigned to Anazygidae by Williams et al. (2002).
Subtaxa
Synonymy list
| Year | Name and author |
|---|---|
| 1883 | Anazyginae Davidson |
| 2002 | Anazyginae Williams et al. p. 1440 |
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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.
Subfm. †Anazyginae Davidson 1883
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G. †Anazyga Davidson 1882
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†Anazyga aequivalvis Twenhofel 1928
†Anazyga orbis Reed 1917
†Anazyga recurvirostra Hall 1847
Invalid names: Hallina [synonym], Nuria [synonym]
G. †Zygospira Hall 1862
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†Zygospira deflecta Hall 1847
†Zygospira fallax Marek and Havlíček 1967
†Zygospira gutta Oraspold 1956
†Zygospira kentuckiensis Hall and Clarke 1895
†Zygospira lebanonensis Cooper 1956
†Zygospira matutina Cooper 1956
†Zygospira meafordensis Foerste 1924
†Zygospira modesta Hall 1847
†Zygospira resupinata Wang 1949
†Zygospira resupinata multicostata Howe 1965
†Zygospira sulcata Howe 1965
Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: f = family, c = class, p = phylum, uc = unranked clade | |||||
| References: Nesnidal et al. 2013, Aberhan et al. 2004, Meyer et al. 2009 | |||||
Age range: base of the Middle Ordovician to the top of the Homerian or 470.00000 to 427.40000 Ma
Collections (1124 total)
Oldest occurrences | |||
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Ordovician | USA (Tennessee) | Anazyga sp. (1959) | |
| Ordovician | USA (Ohio) | Zygospira modesta (77814) | |
| Middle Ordovician | USA (Virginia) | Zygospira sp. (6992) | |
| Middle Ordovician | USA (Kentucky) | Zygospira modesta (10758) Zygospira sp. (10745 10757) | |
| Middle Ordovician | USA (New York) | Anazyga sp. (333 430) Anazyga sp., Zygospira sp. (334) Zygospira sp. (405) | |
| Whiterockian | USA (California) | Zygospira sp. (104345 104347) | |
| Middle Ordovician - Late/Upper Ordovician | USA (Kentucky) | Zygospira sp. (10720 10746) | |
| Middle Ordovician - Late/Upper Ordovician | Canada (Nunavut) | Zygospira sp. (101977) | |
| Costonian | United Kingdom (Shropshire) | Zygospira sp. (45278) | |
| Soudleyan - Marshbrookian | Norway (Oslo) | Zygospira sp. (3252) | |
Youngest occurrences |
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| Time interval | Ma | Country or state | PBDB collection number |
| Llandovery | Russian Federation (Siberia) | Zygospira gracilis, Zygospira planoconvexa (206317) | |
| Llandovery | Canada (Québec) | Zygospira sp. (24538) | |
| Raikkula | Estonia (Hiiu) | Zygospira aprinis (195422) | |
| Aeronian | Canada (Quebec) | Zygatrypa sp. (5784 5785 184854) | |
| Telychian | Sweden (Gotland) | Rhynchonella exigua (192342) | |
| Telychian - Sheinwoodian | Sweden (Gotland) | Rhynchonella exigua (13523 13674) | |
| Sheinwoodian | Sweden (Gotland) | Rhynchonella exigua (13524 13675) | |
| Sheinwoodian | Canada (Nunavut) | Zygatrypa stenoparva (26003 26009 26014) | |
| Wenlock | USA (California) | Zygatrypa stenoparva (226732) | |
| Homerian | Canada (Northwest Territories) | Zygatrypa paupera (497) | |