Biology:Eochanna
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Eochanna is an extinct genus of freshwater or estuarine ray-finned fish, potentially a snakehead, from the Eocene of Pakistan. It contains a single species, E. chorlakkiensis, from the early Lutetian age (48-47 million years ago)[1] in the area of what is now the Kuldana Formation near Chorlakki.[2]
Described based on an isolated anguloarticular (jaw hinge) bone, Eochanna was initially considered the earliest known snakehead in the fossil record. However, a 2020 study disputed this taxonomic assignment, noting that some of the traits of the bone, used to confirm its placement as a snakehead, are also present in other fish taxa. Thus, the taxonomic placement of Eochanna remains uncertain.[3]
References
- ↑ "Palaeocritti - a guide to prehistoric animals". http://www.palaeocritti.com/eochanna.
- ↑ Roe, L. J. (1991): Phylogenetic and Ecological Significance of Channidae (Osteichthyes Teleostei) from the Early Eocene Kuldana Formation of Kohat, Pakistan. Contributions From The Museum Of Paleontology, The University Of Michigan, VOL. 28, NO. 5, PP. 93-10
- ↑ Rüber, Lukas; Tan, Heok Hui; Britz, Ralf (2020). "Snakehead (Teleostei: Channidae) diversity and the Eastern Himalaya biodiversity hotspot" (in en). Journal of Zoological Systematics and Evolutionary Research 58 (1): 356–386. doi:10.1111/jzs.12324. ISSN 1439-0469. https://onlinelibrary.wiley.com/doi/abs/10.1111/jzs.12324.
Wikidata ☰ Q5381621 entry
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