| Basic info | Taxonomic history | Classification | Included Taxa |
| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Opisthotreta
Taxonomy
Opisthotreta was named by Palmer (1954) [Sepkoski's age data: Cm Dres-l]. It is not extant. Its type is Opisthotreta depressa.
It was assigned to Acrotretidae by Williams et al. (2000); and to Acrotretida by Sepkoski (2002).
It was assigned to Acrotretidae by Williams et al. (2000); and to Acrotretida by Sepkoski (2002).
Species
O. depressa (type species)
Species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1954 | Opisthotreta Palmer p. 771 |
| 2000 | Opisthotreta Williams et al. p. 115 |
| 2002 | Opisthotreta 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.
Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: g = genus, o = order, c = class, uc = unranked clade | |||||
| References: Hendy 2009, Nesnidal et al. 2013, Aberhan et al. 2004 | |||||
Age range: base of the Guzhangian to the top of the Dresbachian or 500.50000 to 485.40000 Ma
Collections (61 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Caerfai - St Davids | Italy (Sardinia) | O. sardica (55892 55893 55896 55897 55902 55905 55906 55907) | |
| St Davids | Canada (Alberta) | O. sp. (49204 49207) | |
| Menevian | USA (Nevada) | O. indistincta (64025) O. transversa (64007) | |
| Marjumian | USA (Texas) | O. sp. (78732 78734 78735 78737) | |
| Marjumian | USA (Alabama) | O. sp. (75640 75641 75642 75643) | |
| Guzhangian | USA (Texas) | O. depressa (208619 208620 208621 208645 208646 208647 208648 208658 208660 208662 208668 208677 208679 208681 208683 208684 208685 208686 208708 208726 208728 208729 208753 208754 208755 208756 208758 208759 208760 208761 208843 208844 208849 208850 208851 208852 208987) | |
| Mindyallan | Australia (Northern Territory) | O. sp. (208578 208579) | |
| Dresbachian | USA (Nevada) | O. sp. (75741 75742) |