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| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Quadrisonia
Taxonomy
Quadrisonia was named by Rowell and Henderson (1978).
It was assigned to Acrotretinae by Puura and Holmer (1993); to Acrotretida by Sepkoski (2002); and to Acrotretidae by Williams et al. (2000), Popov et al. (2002).
It was assigned to Acrotretinae by Puura and Holmer (1993); to Acrotretida by Sepkoski (2002); and to Acrotretidae by Williams et al. (2000), Popov et al. (2002).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 1978 | Quadrisonia Rowell and Henderson |
| 1993 | Quadrisonia Puura and Holmer |
| 2000 | Quadrisonia Williams et al. p. 118 |
| 2002 | Quadrisonia Popov et al. pp. 222, 225 |
| 2002 | Quadrisonia Sepkoski |
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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. †Quadrisonia Rowell and Henderson 1978
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†Quadrisonia declivis Koneva and Popov 1988
†Quadrisonia lavadamensis Popov et al. 2002
†Quadrisonia minor Rowell and Henderson 1978
†Quadrisonia suspensa Koneva and Popov 1988
Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: o = order, c = class, uc = unranked clade | |||||
| References: Nesnidal et al. 2013, Aberhan et al. 2004 | |||||
Collections (46 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Mindyallan - Idamean | Australia (Victoria) | Q. sp. (64043 64047) | |
| Paibian - Steptoean | Mexico | Q. sp. (236897) | |
| Sakian | Kazakhstan | Q. minor (118328 118329 118333 118334 118336 118340 118342 118344 118348 118349 118350 118368 122767 122770) | |
| Furongian | New Zealand (Maruia) | Q. sp. nov. A (204050) | |
| Furongian | Kazakhstan | Q. declivis (122800 122801 122804) Q. suspensa (122807 122808) | |
| Millardan | USA (Utah) | Q. lavadamensis (62067 62068) | |
| Aksaian | Kazakhstan | Q. declivis (118394 118399 118454 118467 118874 118883 122773 122777 122781 122791) Q. minor (118396 118453 122778 122780 122790) Q. minor, Q. declivis (118450 122789) | |
| Aksaian - Batyrbaian | Kazakhstan | Q. declivis (123104 123105 123106) | |
| Varangu | Sweden (Västerbotten) | Q. sp. (191675) |