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Plocezyga
Taxonomy
Hemizyga (Plocezyga) was named by Knight (1930).
It was Gamizyga (Plocezyga) by Hoare and Sturgeon (1980); it was reranked as Ploceozyga by Pan and Erwin (2002); it was reranked as Plocezyga by Knight et al. (1960), Hoare and Sturgeon (1980), Sepkoski (2002), Wagner (2023).
It was assigned to Hemizyga by Knight (1930); to Pseudozygopleuridae by Hoare and Sturgeon (1980); to Gamizyga by Hoare and Sturgeon (1980); to Neotaenioglossa by Sepkoski (2002); and to Pseudozygopleurinae by Knight et al. (1960), Pan and Erwin (2002), Wagner (2023).
It was Gamizyga (Plocezyga) by Hoare and Sturgeon (1980); it was reranked as Ploceozyga by Pan and Erwin (2002); it was reranked as Plocezyga by Knight et al. (1960), Hoare and Sturgeon (1980), Sepkoski (2002), Wagner (2023).
It was assigned to Hemizyga by Knight (1930); to Pseudozygopleuridae by Hoare and Sturgeon (1980); to Gamizyga by Hoare and Sturgeon (1980); to Neotaenioglossa by Sepkoski (2002); and to Pseudozygopleurinae by Knight et al. (1960), Pan and Erwin (2002), Wagner (2023).
Subtaxa
Hemizyga (Plocezyga) abolescens, Hemizyga (Plocezyga) angularis, Hemizyga (Plocezyga) convertacostata, Hemizyga (Plocezyga) serocorona, Hemizyga (Plocezyga) tenuis, P. (Plocezyga), P. acuminata, P. boikoi, P. conica, P. convexa, P. cordiformis, P. corona, P. costata, P. delicata, P. excellens, P. gruendeli, P. indica, P. intermedia, P. lineata, P. lirata, P. markae, P. minuta, P. obscura, P. ornata, P. ornatissima, P. percostata, P. perminuta, P. regularia, P. salomonense, P. subnodosa, P. subquadrata, P. tenuilirata, P. turbinata, P. venusta
Synonymy list
| Year | Name and author |
|---|---|
| 1930 | Hemizyga (Plocezyga) Knight pp. 17 – 18 |
| 1960 | Plocezyga Knight et al. p. 315 |
| 1980 | Gamizyga (Plocezyga) Hoare and Sturgeon p. 160 |
| 1980 | Plocezyga Hoare and Sturgeon p. 1101 |
| 2002 | Ploceozyga Pan and Erwin p. 25 |
| 2002 | Plocezyga Sepkoski |
| 2023 | Plocezyga Wagner p. G1200 |
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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. †Plocezyga Knight 1930
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†Gamizyga (Plocezyga) percostata subrotunda Hoare and Sturgeon 1980
†Hemizyga (Plocezyga) abolescens Knight 1930
†Hemizyga (Plocezyga) angularis Knight 1930
†Hemizyga (Plocezyga) convertacostata Hoare 1961
†Hemizyga (Plocezyga) serocorona Batten 1985
†Hemizyga (Plocezyga) tenuis Knight 1930
Subg. †Plocezyga (Plocezyga) Knight 1930
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†Plocezyga (Plocezyga) varica Pan and Erwin 2002
†Plocezyga (Plocezyga) yunnanensis Pan and Erwin 2002
†Plocezyga acuminata Hoare and Sturgeon 1980
†Plocezyga boikoi Mazaev 2019
†Plocezyga conica Hoare and Sturgeon 1980
†Plocezyga convexa Mazaev 2019
†Plocezyga cordiformis Hoare and Sturgeon 1980
†Plocezyga corona Knight 1930
†Plocezyga costata Mark 1912
†Plocezyga delicata Hoare and Sturgeon 1980
†Plocezyga excellens Hoare and Sturgeon 1980
†Plocezyga gruendeli Kaim 2004
†Plocezyga indica Reed 1944
†Plocezyga intermedia Hoare and Sturgeon 1980
†Plocezyga lineata Hoare and Sturgeon 1980
†Plocezyga lirata Hoare and Sturgeon 1980
†Plocezyga markae Hoare and Sturgeon 1980
†Plocezyga minuta Mazaev 2019
†Plocezyga obscura Hoare and Sturgeon 1980
†Plocezyga ornata Mark 1912
†Plocezyga ornatissima Hoare and Sturgeon 1980
†Plocezyga percostata Knight 1930
†Plocezyga perminuta Hoare and Sturgeon 1980
†Plocezyga regularia Hoare and Sturgeon 1980
†Plocezyga salomonense Gemmellaro 1889
†Plocezyga subnodosa Hoare and Sturgeon 1980
†Plocezyga subquadrata Hoare and Sturgeon 1980
†Plocezyga tenuilirata Knight 1930
†Plocezyga turbinata Hoare and Sturgeon 1980
†Plocezyga venusta Mazaev 2019
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| J. B. Knight 1930 | Hemizygae with strong transverse costae that are confined to the
sides of the volution, and with fine revolving lirae on the sides and base. The columellar section shows a slightly arcuate columella, a sub-circular opening and a relatively thin outer wall with no localized thickening (Fig. 3, F). The pseudozygopleuroid nucleus has been observed in numerous specimens. |