Ctenognathichthys
Ctenognathichthys is an extinct genus of prehistoric bony fish that lived during the Anisian and Ladinian ages of the Middle Triassic epoch in what is now southern/southeastern Switzerland and northern Italy.[1]
| Ctenognathichthys Temporal range: | |
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| Fossil from Monte San Giorgio | |
| Scientific classification | |
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| Genus: | †Ctenognathichthys Bürgin, 1992 |
| Type species | |
| †Heterolepidotus bellottii de Alessandri, 1910 | |
Ctenognathichthys sp. fossil showing the elongate prehensile teeth
It was a small fish measuring 21 cm (8.3 in) in total length.[2] It had long long prehensile teeth in its upper and lower jaws.[3]
Occurrence
Fossils of Ctenognathichthys were recovered from the Anisian–Ladinian aged Besano Formation of Monte San Giorgio area (Swiss-Italian borderland)[3] and from the early Ladinian Prosanto Formation of canton Graubünden, Switzerland.[4] The type species is Ctenognathichthys bellottii, which was found in both collecting sites. A possible second species, Ctenognathichthys hattichi,[4] is only known from the Prosanto Formation. This species was referred to the genus Luopingichthys.[5]
Classification
Ctenognathichthys was first classified as a member of the family Perleididae and order Perleidiformes.[3] More recently, it was included in the family Louwoichthyidae (order Louwoichthyiformes).[6]
References
- Sepkoski, Jack (2002). "A compendium of fossil marine animal genera". Bulletins of American Paleontology. 364: 560. Archived from the original on 2011-07-23. Retrieved 2009-02-27.
- Rieppel, O. (2019). Mesozoic Sea Dragons: Triassic Marine Life from the Ancient Tropical Lagoon of Monte San Giorgio. Indiana University Press. p. 54. doi:10.2307/j.ctvd58t86. ISBN 978-0253040114. S2CID 241534158.
- Bürgin, T. (1992). "Basal ray-finned fishes (Osteichthyes; Actinopterygii) from the Middle Triassic of Monte San Giorgio (Canton Tessin, Switzerland). Systematic palaeontology with notes on functional morphology and palaeoecology". Schweizerische Paläontologische Abhandlungen. 114: 1–164.
- Bürgin, T.; Herzog, A. (2002). "Die Gattung Ctenognathichthys (Actinopterygii, Perleidformes) aus der Prosanto-Formation (Ladin, Mitteltrias) Graubündens (Schweiz), mit der Beschreibung einer neuen Art, C. hattichi sp. nov". Eclogae Geologicae Helvetiae. 95: 461–469.
- Sun, Z.; Tintori, A.; Jiang, D.; Lombardo, C.; Rusconi, M.; Hao, W.; Sun, Y. (2009). "A New Perleidiform (Actinopterygii, Osteichthyes) from the Middle Anisian (Middle Triassic) of Yunnan, South China". Acta Geologica Sinica. 83 (3): 460–470. doi:10.1111/j.1755-6724.2009.00067.x. S2CID 131017922.
- Xu, G.-H. (2020). "A new stem-neopterygian fish from the Middle Triassic (Anisian) of Yunnan, China, with a reassessment of the relationships of early neopterygian clades". Zoological Journal of the Linnean Society. 191 (2): 375–394. doi:10.1093/zoolinnean/zlaa053.
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