Ctenognathichthys

Ctenognathichthys Temporal range: Anisian–Ladinian [1] PreꞒ Ꞓ O S D C P T J K Pg N
Fossil from Monte San Giorgio
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Actinopterygii
Order:	† Louwoichthyiformes
Family:	† Louwoichthyidae
Genus:	† Ctenognathichthys Bürgin, 1992
Species:	†C. bellottii
Binomial name
†Ctenognathichthys bellottii (de Alessandri, 1910)
Synonyms
† Heterolepidotus bellottiide Alessandri, 1910

Ctenognathichthys is an extinct genus of prehistoric marine ray-finned fish that lived during the Middle Triassic epoch of Europe, in the former Tethys Ocean. ^{[1] [2]}

Taxonomy and occurrence

It contains a single species, C. bellottii from the Anisian–Ladinian-aged Besano Formation of Monte San Giorgio area (Swiss-Italian borderland), ^[3] the early Ladinian Prosanto Formation of canton Graubünden, Switzerland, and possibly the late Ladinian Alcover Unit of Spain. ^{[2] [4] [5]} Indeterminate remains are known from the middle Anisian of the Strelovec Formation of Slovenia. ^[6] A second species (C. hattichiBürgin & Herzog 2002) from the Prosanto Formation was previously placed in this genus, but a 2009 study placed it in the new genus Luopingichthys alongside a species from China. ^[7]

Classification

Ctenognathichthys was first classified as a member of the family Perleididae and order Perleidiformes, a group that is now considered paraphyletic. ^[3] More recently, it has been reclassified into the family Louwoichthyidae (order Louwoichthyiformes). ^[8]

Description

Ctenognathichthys sp. fossil showing the elongate prehensile teeth

It was a small fish measuring 21 cm (8.3 in) in total length. ^[9] It had long prehensile teeth in its upper and lower jaws. ^[3]

See also

• Paleontology portal
• Fish portal

• Prehistoric fish
• List of prehistoric bony fish

References

1. 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.
2. "PBDB Taxon". paleobiodb.org. Retrieved 2024-06-27.
3. 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.
4. Bürgin, Toni; Herzog, Annette (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.
5. Cartanyà, Joan; Fortuny, Josep; Bolet, Arnau; Garcia Artigas, Ruben (2019-05-24). "Moradebrichthys vilasecae gen. et sp. nov., a new perleidid (Actinopterygii: Osteichthyes) from the Middle Triassic of Catalonia (NE Iberian Peninsula)". Articles Publicats en Revistes (Mineralogia, Petrologia I Geologia Aplicada). 292 (2): 171–190. doi:10.1127/njgpa/2019/0816. hdl: 2445/168813 . ISSN   0077-7749.
6. Križnar, Matija; Tintori, Andrea. "The Kingdom of Tethys - The Fossilized World of Triassic Vertebrates from the Kamniško-Savinjske Alps / Kraljestvo Tetide - Okamneli svet triasnih vretenčarjev Kamniško-Savinjskih Alp". Scopolia - Suppl. 5 (Journal of the Slovenian Museum of Natural History).
7. Sun, Zuoya; Tintori, Andrea; Jiang, Dayong; Lombardo, Cristina; Rusconi, Marco; Hao, Weicheng; Sun, Yuanlin (2009-06-10). "A New Perleidiform (Actinopterygii, Osteichthyes) from the Middle Anisian (Middle Triassic) of Yunnan, South China". Acta Geologica Sinica. 83 (3): 460–470. Bibcode:2009AcGlS..83..460S. doi: 10.1111/j.1755-6724.2009.00067.x . S2CID   131017922.
8. Xu, Guang-Hui (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 .
9. Rieppel, Olivier (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.