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Tetragregnon
Taxonomy
Tetragregnon was named by Ormiston and Lane (1976) [Sepkoski's age data: C Tour-u P Djhu Sepkoski's reference number: 535,1007]. Its type is Tetragregnon sycamorensis.
It was assigned to Pseudolitheliidae by De Wever et al. (2001); to Spumellaria by Sepkoski (2002); and to Tetratormentidae by Noble et al. (2017).
It was assigned to Pseudolitheliidae by De Wever et al. (2001); to Spumellaria by Sepkoski (2002); and to Tetratormentidae by Noble et al. (2017).
Species
Archaeopyramisa concava, Archaeopyramisa convexa, Archaeopyramisa globosa, Archaeopyramisa haeckeli, Archaeopyramisa robusta, Archaeopyramisa talihinaensis, Tetracircinata reconda, T. iowaensis, T. japonicum, T. longispinatum, T. nitidus, T. pyramidatus, T. scalpratus, T. sphaericus, T. sycamorensis (type species), T. tunicatus, T. vimineum, Tetraspongoactinia holdsworthi
Synonyms
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Synonymy list
Year | Name and author |
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1976 | Tetragregnon Ormiston and Lane |
1984 | Tetracircinata Nazarov and Ormiston |
1986 | Archaeopyramisa Cheng |
1998 | Tetraspongoactinia Won |
2001 | Tetragregnon De Wever et al. p. 101 |
2001 | Tetraspongoactinia De Wever et al. p. 101 |
2002 | Archaeopyramisa Sepkoski |
2002 | Tetracircinata Sepkoski |
2002 | Tetragregnon Sepkoski |
2017 | Tetragregnon Noble et al. p. 469 |
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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. †Tetragregnon Ormiston and Lane 1976
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†Tetragregnon iowaensis Nestell et al. 2012
†Tetragregnon japonicum Sashida and Tonishi 1985
†Tetragregnon longispinatum Feng et al. 2006
†Tetragregnon nitidus Nazarov and Ormiston 1985
†Tetragregnon pyramidatus Nazarov 1986
†Tetragregnon scalpratus Nazarov and Ormiston 1985
†Tetragregnon sphaericus Nazarov 1986
†Tetragregnon sycamorensis Ormiston and Lane 1976
†Tetragregnon tunicatus Nazarov 1986
†Tetragregnon vimineum Amon et al. 1990
Invalid names: Archaeopyramisa Cheng 1986 [synonym], Tetracircinata Nazarov and Ormiston 1984 [synonym], Tetraspongoactinia Won 1998 [synonym]
Diagnosis
No diagnoses are available