Isadia
| Isadia Temporal range: | |
|---|---|
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Actinopterygii |
| Order: | †Eurynotoidiformes |
| Family: | †Eurynotoidiidae |
| Genus: | †Isadia Minikh, 1986 |
| Species | |
|
See text | |
Isadia is an extinct genus of prehistoric freshwater ray-finned fish from the order Eurynotoidiformes. It is known from the Permian of European Russia.[1][2][3] The genus Amblypterina is partially considered a junior synonym of both Isadia and Kichkassia.[2]
The following species are known:[4]
- I. arefievi Minikh, Arefiev & Golubev, 2015 - Wuchiapingian of Vologda, Russia (Salarevskaya Formation)
- I. aristoviensis Minikh, 1990 (syn: Amblypterina grandicostata) - Capitanian to Wuchiapingian of Vologda & Orenburg, Russia (Vyazovskaya, Kutuluk & Kulchumovskaya Formations)
- I. opokiensis Minikh & Andrushkevich, 2017 - Capitanian to Wuchiapingian of Vologda, Russia (Poldarsky Formation)[5]
- I. suchonensis Minikh, 1986 (syn: Amblypterina pectinata) - Capitanian to Wuchiapingian of Vologda & Orenburg, Russia (Poldarsky & Malokinelskaya Formations)[2]
Based on an extensive review of tooth morphology, Isadia was a herbivorous fish that predominantly fed on algae. I. suchonensis had teeth adapted for shearing off algae in manner similar to a surgeonfish, I. opokiensis & I. arefievi had teeth adapted for scraping algae off rocks similar to certain cichlids, and I. aristoviensis cropped parts of large algae and submerged vascular plants in a manner similar to rabbitfish. Based on this morphology, Isadia can be divided into two evolutionary lineages: one lineage comprising I. suchonensis→I. opokiensis→I. arefievi, and one lineage comprising just I. aristoviensis.[4]
See also
[edit]
References
[edit]- ↑ "PBDB". paleobiodb.org. Retrieved 2024-02-16.
- 1 2 3 Bakaev, A. S. (2022-12-01). "On the Revision of the Permian Ray-Finned Fishes of European Russia. Part 2". Paleontological Journal. 56 (6): 670–681. Bibcode:2022PalJ...56..670B. doi:10.1134/S003103012206003X. ISSN 1555-6174.
- ↑ Bakaev, Aleksandr S.; Bulanov, Valery V.; Kogan, Ilja; Johanson, Zerina; Minikh, Alla V. (2024). "Early ray-finned herbivores: the dental system of Eurynotoidiidae (Actinopterygii; middle–late Permian, European Russia) and implications for palaeobiology and palaeoecology". Palaeontology. 67 (3) e12700. Bibcode:2024Palgy..6712700B. doi:10.1111/pala.12700. ISSN 1475-4983.
- 1 2 Minikh, A. V.; Arefiev, M. P.; Golubev, V. K. (2015-11-01). "A new fish species of the genus Isadia (Actinopterygii, Eurynotoidiformes) from the new locality on the Malaya Northern Dvina river (terminal Permian, Vologda Region)". Paleontological Journal. 49 (6): 615–626. Bibcode:2015PalJ...49..615M. doi:10.1134/S0031030115060076. ISSN 1555-6174.
- ↑ Васильевна, Миних Алла; Олегович, Андрушкевич Станислав (2017). "Новый вид лучеперой рыбы из верхней перми Московской синеклизы". Известия Саратовского Университета. Новая Серия. Серия Науки О Земле. 17 (2): 100–104. ISSN 1819-7663.
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