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Hyphantozyga
Taxonomy
Hemizyga (Hyphantozyga) was named by Knight (1930). Its type is Hemizyga (Hyphantozyga) gracilis.
It was Plocezyga (Hyphantozyga) by Hoare and Sturgeon (1980); it was Gamizyga (Hyphantozyga) by Hoare and Sturgeon (1980); it was Ploceozyga (Hyphantozyga) by Pan and Erwin (2002); it was reranked as Hyphantozyga by Sepkoski (2002), Mazaev (2015) and Ketwetsuriya et al. (2020).
It was assigned to Hemizyga by Knight (1930), Knight et al. (1960) and Hoare (1961); to Gamizyga by Hoare and Sturgeon (1980); to Plocezyga by Hoare and Sturgeon (1980); to Ploceozyga by Pan and Erwin (2002); to Neotaenioglossa by Sepkoski (2002); and to Pseudozygopleuridae by Mazaev (2015) and Ketwetsuriya et al. (2020).
It was Plocezyga (Hyphantozyga) by Hoare and Sturgeon (1980); it was Gamizyga (Hyphantozyga) by Hoare and Sturgeon (1980); it was Ploceozyga (Hyphantozyga) by Pan and Erwin (2002); it was reranked as Hyphantozyga by Sepkoski (2002), Mazaev (2015) and Ketwetsuriya et al. (2020).
It was assigned to Hemizyga by Knight (1930), Knight et al. (1960) and Hoare (1961); to Gamizyga by Hoare and Sturgeon (1980); to Plocezyga by Hoare and Sturgeon (1980); to Ploceozyga by Pan and Erwin (2002); to Neotaenioglossa by Sepkoski (2002); and to Pseudozygopleuridae by Mazaev (2015) and Ketwetsuriya et al. (2020).
Synonymy list
| Year | Name and author |
|---|---|
| 1930 | Hemizyga (Hyphantozyga) Knight pp. 18 – 19 |
| 1960 | Hemizyga (Hyphantozyga) Knight et al. p. 315 |
| 1961 | Hemizyga (Hypantozyga) Hoare p. 175 |
| 1980 | Gamizyga (Hyphantozyga) Hoare and Sturgeon p. 160 |
| 1980 | Plocezyga (Hyphantozyga) Hoare and Sturgeon p. 1101 |
| 2002 | Ploceozyga (Hyphantozyga) Pan and Erwin p. 25 |
| 2002 | Hyphantozyga Sepkoski |
| 2015 | Hyphantozyga Mazaev p. 968 |
| 2020 | Hyphantozyga Ketwetsuriya et al. p. 69 |
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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. †Hyphantozyga Knight 1930
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†Hyphantozyga fenestrata Hoare and Sturgeon 1980
†Hyphantozyga filicosta Hoare 1961
†Hyphantozyga fusiforma Hoare and Sturgeon 1980
†Hyphantozyga gracilis Knight 1930
†Hyphantozyga grandis Hoare and Sturgeon 1980
†Hyphantozyga granifera de Koninck 1876
†Hyphantozyga khaophrikensis Ketwetsuriya et al. 2020
†Hyphantozyga knighti Hoare and Sturgeon 1980
†Hyphantozyga noinskyi Mazaev 2015
†Hyphantozyga perattenuata Hoare and Sturgeon 1980
†Hyphantozyga pulchra Hoare and Sturgeon 1980
†Hyphantozyga textilis Hoare and Sturgeon 1980
†Ploceozyga (Hyphantozyga) cancellata Mark 1912
†Ploceozyga (Hyphantozyga) matanensis Pan and Yu 1993
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| J. B. Knight 1930 | The subgenus Hyphantozyga is erected to embrace such Hemizygae as have progressed much further along the lines of the weakening d the transverse costae and strengthening of the revolving lirae. The transverse and the revolving ribs are in this group subequal at all post-nuclear stages of development and cover the base as well as the sides of the whorls. This appearance of a coarsely woven cloth given by the two sets of ribs running at approximately right angles to one another has suggested the name of the subgenus which is derived from the Greek 6$av~os (woven) and the syllable -zyga. Too few specimens are at hand to allow the preparation of sections. The nucleus, which has been seen, is entirely characteristic of the Pseudozygopleurinae. |
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 3 | 4.61 | 3.80 | 6.30 | 4.10 | 1.37 |
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| Source: c = class | |||||
| Reference: Kiessling 2004 | |||||
Age range: base of the Emsian to the top of the Changhsingian or 407.60000 to 252.17000 Ma
Collections (21 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Emsian | Australia (New South Wales) | Hemizyga granifera (43890) | |
| Atokan | USA (Ohio) | Gamizyga perattenuata, Gamizyga fusiforma (79351) | |
| Moscovian | USA (Missouri) | Hemizyga gracilis, Hemizyga sp. (69773) | |
| Desmoinesian | USA (New Mexico) | Hemizyga fenestrata, Hemizyga knighti (46536) | |
| Desmoinesian | USA (Ohio) | Gamizyga knighti (71963 72001 79324) Gamizyga knighti, Gamizyga perattenuata, Gamizyga pulchra, Gamizyga gracilis (72004) Gamizyga perattenuata (79389 93081) | |
| Missourian | USA (Ohio) | Aclisina cancellata (69721) Gamizyga cancellata (79349 183165 183205) Gamizyga grandis, Gamizyga textilis, Gamizyga cancellata (93082) Gamizyga perattenuata (79350) | |
| Virgilian | USA (West Virginia) | Hemizyga fenestrata (79391) | |
| Roadian | Russian Federation (Kirov) | H. noinskyi (126335) | |
| Wordian | Thailand (Ratchaburi) | H. khaophrikensis (40954) | |
| Wuchiapingian | China (Guangxi) | Ploceozyga matanensis (56893) | |
| Changhsingian | China (Guangxi) | Ploceozyga sp. (56895) |