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Cryptonellidae
Taxonomy
Cryptonellidae was named by Thomson (1926). Its type is Cryptonella.
It was assigned to Cryptonelloidea by Williams et al. (2006).
It was assigned to Cryptonelloidea by Williams et al. (2006).
Subtaxa
Synonymy list
| Year | Name and author |
|---|---|
| 1926 | Cryptonellidae Thomson |
| 2006 | Cryptonellidae Williams et al. p. 2024 |
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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.
Fm. †Cryptonellidae Thomson 1926
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Subfm. †Cryptonellinae Thomson 1926
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G. †Cryptonella
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†Cryptonella circula Walcott 1884
†Cryptonella ovalis Miller 1891
†Cryptonella pinonensis Walcott 1884
†Cryptonella planirostris Hall 1867
†Cryptonella rectirostris Hall 1867
G. †Heterelasma Girty 1908
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†Dielasma (Heterelasma) semitarium Reed 1944
†Heterelasma angulatum Cooper and Grant 1976
†Heterelasma concavum Cooper and Grant 1976
†Heterelasma contortum Cooper and Grant 1976
†Heterelasma contrerasi Cooper 1953
†Heterelasma geniculatum Stehli 1954
†Heterelasma gibbosum Cooper and Grant 1976
†Heterelasma glansfagea Cooper and Grant 1976
†Heterelasma lenticularia Stehli 1954
†Heterelasma magnum Cooper and Grant 1976
†Heterelasma ngariensis Hu 1990
†Heterelasma pentagonum Cooper and Grant 1976
†Heterelasma quadratum Cooper and Grant 1976
†Heterelasma shumardianum Girty 1908
†Heterelasma solidum Cooper and Grant 1976
†Heterelasma sulciplicatum Cooper and Grant 1976
†Heterelasma venustulum Girty 1908
G. †Petriathyris
G. †Texarina Cooper and Grant 1970
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†Texarina elongata Cooper and Grant 1976
†Texarina oblongata Cooper and Grant 1969
†Texarina parallela Cooper and Grant 1976
†Texarina paucula Cooper and Grant 1976
†Texarina solita Cooper and Grant 1976
†Texarina wordensis King 1931
Invalid names: Texasia Cooper and Grant 1969 [replaced]
Diagnosis
No diagnoses are available