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Cyrtonelloidea
Taxonomy
Cyrtonellacea was named by Knight and Yochelson (1958).
It was corrected as Cyrtonelloidea by Wagner (2023).
It was assigned to Tryblidioida by Knight and Yochelson (1960); and to Cyrtonellida by Knight and Yochelson (1958), Wahlman (1992), Wagner (2023).
It was corrected as Cyrtonelloidea by Wagner (2023).
It was assigned to Tryblidioida by Knight and Yochelson (1960); and to Cyrtonellida by Knight and Yochelson (1958), Wahlman (1992), Wagner (2023).
Synonymy list
| Year | Name and author |
|---|---|
| 1958 | Cyrtonellacea Knight and Yochelson |
| 1960 | Cyrtonellacea Knight and Yochelson p. 80 |
| 1992 | Cyrtonellacea Wahlman |
| 2023 | Cyrtonelloidea Wagner |
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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.
Superfm. †Cyrtonelloidea Knight and Yochelson 1958
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Fm. †Cyrtonellidae Knight and Yochelson 1958
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G. †Isospira Koken 1897
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†Isospira bucanioides Koken 1897
†Isospira huttoni Reed 1921
†Isospira lepida Perner 1903
†Isospira nautilina Koken and Perner 1925
†Isospira reinwaldti Öpik 1930
†Isospira reticulata Wängberg-Eriksson 1964
Invalid names: Isospiridae Wängberg-Eriksson 1964 [synonym]
Invalid names: Cyclocyrtonellidae Horný 1962 [empty]
Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: o = order, c = class | |||||
| Reference: Hendy et al. 2009 | |||||
Age range: base of the Middle Ordovician to the top of the Givetian or 471.30000 to 382.31000 Ma
Collections (16 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Middle Ordovician | USA (Tennessee) | Cyrtonella sp. (319) | |
| Caradoc | USA (Virginia) | Cyrtonella sp. (326) | |
| Vormsi | Estonia (Harju) | Isospira bucanioides (156588) | |
| Vormsi | Estonia (Lääne) | Isospira bucanioides (87307) | |
| Pusgillian | United Kingdom (Scotland) | Isospira huttoni (73133) | |
| Pirgu - Porkuni | Sweden (Dalarne) | Isospira reticulata (73407) | |
| Gorstian | Czechia (Hlavni města Praha) | Isospira lepida (104940) | |
| Cazenovian | USA (New York) | Cyrtonella mitella (69460 69461 69462 69463 69465) | |
| Givetian | USA (New York) | Cyrtolites mitella (155419) Cyrtonella sp. (89705 89791 89886) |