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Stephanozyga
Taxonomy
Pseudozygopleura (Stephanozyga) was named by Knight (1930) [Sepkoski's age data: C Vise P Guad-l Sepkoski's reference number: 797].
It was reranked as Palaeostylus (Stephanozyga) by Knight et al. (1960); it was reranked as Stephanozyga by Golikov and Starobogatov (1987), Sepkoski (2002), Bouchet et al. (2005) and Mazaev (2015).
It was assigned to Pseudozygopleura by Knight (1930); to Palaeostylus by Knight et al. (1960); to Stephanozygidae by Golikov and Starobogatov (1987); to Neotaenioglossa by Sepkoski (2002); and to Pseudozygopleuridae by Bouchet et al. (2005) and Mazaev (2015).
It was reranked as Palaeostylus (Stephanozyga) by Knight et al. (1960); it was reranked as Stephanozyga by Golikov and Starobogatov (1987), Sepkoski (2002), Bouchet et al. (2005) and Mazaev (2015).
It was assigned to Pseudozygopleura by Knight (1930); to Palaeostylus by Knight et al. (1960); to Stephanozygidae by Golikov and Starobogatov (1987); to Neotaenioglossa by Sepkoski (2002); and to Pseudozygopleuridae by Bouchet et al. (2005) and Mazaev (2015).
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1930 | Pseudozygopleura (Stephanozyga) Knight p. 15 |
| 1955 | Palaeozygopleura (Nodozyga) Horný p. 155 |
| 1960 | Palaeostylus (Stephanozyga) Knight et al. p. 313 |
| 1987 | Stephanozyga Golikov and Starobogatov p. 25 |
| 2002 | Stephanozyga Sepkoski |
| 2005 | Stephanozyga Bouchet et al. pp. 25, 247 |
| 2015 | Stephanozyga Mazaev p. 968 |
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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. †Stephanozyga Knight 1930
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†Pseudozygopleura (Stephanozyga) lisaspira Kues and Batten 2001
†Pseudozygopleura (Stephanozyga) nishimurai Kase 1988
†Stephanozyga crassa Wanner 1922
†Stephanozyga granda Kues and Batten 2001
†Stephanozyga ignorata Trautschold 1867
†Stephanozyga lisaspira Kues and Batten 2001
†Stephanozyga magna Wang 1987
†Stephanozyga nodosa Girty 1915
†Stephanozyga ornamentaria Netchaev 1894
†Stephanozyga seminuda Mazaev 2019
†Stephanozyga subnodosa Knight 1930
Invalid names: Nodozyga Horný 1955 [synonym]
Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 3 | 10.7 | 4.60 | 20.3 | 13.3 | 7.87 | |
| shell diameter | 3 | 2.60 | - | - | 2.60 | - |
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| Source: c = class | |||||
| Reference: Kiessling 2004 | |||||
Collections (34 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Carboniferous | USA (Oklahoma) | S. sp. (158) | |
| Chadian | United Kingdom (England) | Zygopleura rugifera (5961) | |
| Visean | Japan | Pseudozygopleura nishimurai (59832) | |
| Visean | China (Guizhou) | Pseudozygopleura magna (59843) | |
| Visean | United Kingdom (Scotland) | Nodozyga rowlandsi (97734) | |
| Brigantian | Poland (Malopolskie) | Palaeostylus rugiferus (101993) | |
| Brigantian | United Kingdom (England) | Loxonema rugiferum (67670) Palaeostylus rugiferus (57131) Zygopleura rugifera (73391 73423 73424) | |
| Brigantian | United Kingdom (Scotland) | Zygopleura rugifera (183271) Zygopleura rugifera, Nodozyga cylindracea (155580) | |
| Brigantian | Ireland (Cork) | Loxonema rugifera (184504) | |
| Chesterian | USA (Kentucky) | Palaeostylus sp. indet. 1, Palaeostylus sp. indet. 2 (59823) | |
| Morrowan | USA (Kentucky) | Zygopleura nodosa (158165) | |
| Morrowan | USA (Texas) | Pseydozygopleura subnodosa (79966) | |
| Moscovian | USA (Missouri) | Pseudozygopleura subnodosa (69772) | |
| Kashirian - Myachkovian | USA (New Mexico) | S. n. sp.?, S. subnodosa (46548) | |
| Desmoinesian | USA (New Mexico) | Pseudozygopleura subnodosa, Pseudozygopleura granda, Pseudozygopleura lisaspira (46536) | |
| Desmoinesian | USA (Missouri) | Palaeostylus subnodosa (70381) | |
| Virgilian | USA (Missouri) | Zygopleura nodosa (157565) | |
| Virgilian | USA (Illinois) | S. sp. (50219) | |
| Gzhelian - Asselian | China (Hopei) | Zygopleura ignorata, Zygopleura crassa (149177) | |
| Gzhelian - Sakmarian | Svalbard and Jan Mayen | S. sp. (212500) | |
| Asselian | Russian Federation (Bashkortostan) | S. seminuda (202159 220885) | |
| Sakmarian | Russian Federation (Bashkortostan) | S. seminuda (220898) | |
| Artinskian | Indonesia | Zygopleura ignorata, Zygopleura crassa (118268) | |
| Kungurian | Malaysia (Perak) | Pseudozygopleura sp. (62131) | |
| Roadian | Mexico (Chiapas) | S. sp. (220046) | |
| Roadian | Russian Federation (Tatarstan) | Loxonema ornamentaria (126331) S. ornamentaria (174707) | |
| Wordian | Russian Federation | Loxonema ornamentaria (197764) |