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Cyclozyga
Taxonomy
Cyclozyga was named by Knight (1930) [Sepkoski's age data: C Tour-u C Step-u Sepkoski's reference number: 797,896,1258]. It is not extant. Its type is Cyclozyga mirabilis.
It was reranked as Zygopleura (Cyclozyga) by Elias (1958).
It was assigned to Pseudozygopleurinae by Knight (1930); to Zygopleura by Elias (1958); to Cyclozygidae by Likharev (1970); to Neotaenioglossa by Sepkoski (2002); and to Pseudozygopleuridae by Knight et al. (1960) and Bouchet et al. (2005).
It was reranked as Zygopleura (Cyclozyga) by Elias (1958).
It was assigned to Pseudozygopleurinae by Knight (1930); to Zygopleura by Elias (1958); to Cyclozygidae by Likharev (1970); to Neotaenioglossa by Sepkoski (2002); and to Pseudozygopleuridae by Knight et al. (1960) and Bouchet et al. (2005).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 1930 | Cyclozyga Knight |
| 1958 | Zygopleura (Cyclozyga) Elias p. 16 |
| 1960 | Cyclozyga Knight et al. p. 315 |
| 1970 | Cyclozyga Likharev p. 54 |
| 2002 | Cyclozyga Sepkoski |
| 2005 | Cyclozyga Bouchet et al. pp. 61, 247 |
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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. †Cyclozyga Knight 1930
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†Cyclozyga attenuata Hoare and Sturgeon 1978
†Cyclozyga carinata Knight 1930
†Cyclozyga micra Beus 1978
†Cyclozyga mirabilis Knight 1930
†Cyclozyga neotenica Elias 1958
†Cyclozyga sinusigera Yoo 1988
Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| height | 9 | 2.38 | 1.50 | 3.70 | 2.50 | 0.684 | |
| shell height | 5 | 2.91 | 2.50 | 3.70 | 2.70 | 0.503 |
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| Source: c = class | |||||
| Reference: Kiessling 2004 | |||||
Age range: base of the Late/Upper Frasnian to the top of the Missourian or 379.50000 to 303.70000 Ma
Collections (13 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Late/Upper Frasnian | USA (Arizona) | Donaldina micra (3374) | |
| Tournaisian | Australia (New South Wales) | C. sinusigera (44088 44158) | |
| Visean | Australia (New South Wales) | C. sp. (44144) | |
| Serpukhovian | USA (Oklahoma) | Zygopleura neotenica (5611) | |
| Atokan | USA (Ohio) | C. attenuata (79351) | |
| Moscovian | USA (Missouri) | C. mirabilis, C. carinata (69773) | |
| Desmoinesian | USA (New Mexico) | C. mirabilis (46536) | |
| Desmoinesian | USA (Ohio) | C. attenuata (72004) C. attenuata, C. mirabilis (93081) | |
| Missourian | USA (Ohio) | C. attenuata (79350 93082) | |
| Missourian | USA (Missouri) | C. sp. (119) |