Cumbaaichthys oxyrhynchus

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Superregnum: Eukaryota
Cladus: Unikonta
Cladus: Opisthokonta
Cladus: Holozoa
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Superphylum: Deuterostomia
Phylum: Chordata
Subphylum: Vertebrata
Infraphylum: Gnathostomata
Megaclassis: Osteichthyes
Superclassis/Classis: Actinopterygii
Classis/Subclassis: Actinopteri
Subclassis/Infraclassis: Neopterygii
Infraclassis: Teleostei
Megacohors: Osteoglossocephalai
Supercohors: Clupeocephala
Cohors: Euteleosteomorpha
Subcohors: Neoteleostei
Infracohors: Eurypterygia
Sectio: Ctenosquamata
Subsectio: Acanthomorphata
Divisio: Polymixiipterygii
Superordo: Polymixiomorpha
Ordo: Polymixiiformes
Genus: †Cumbaaichthys
Species: †Cumbaaichthys oxyrhynchus



Cumbaaichthys oxyrhynchus Murray, 2016

  • Holotype: UALVP 56113, an almost complete fish, missing only the posteriormost tip of the fin rays of the dorsal lobe of the caudal fin, with a counterpart for the anterior portion.

Type locality and Horizon: GSC locality 84342, Lac des Bois, Northwest Territories, Canada, approximately 66˚52’ N, 125˚22’W; based on invertebrates the age is early Turonian.

Etymology: The specific epithet is from the Greek words rhynchos, meaning snout or muzzle, and oxy, meaning tapering to a point, in reference to the snout of the fish being rather pointed in lateral view, unlike many other polymixiiforms (e.g., the extant Polymixia or extinct Boreiohydrias and Apricenaichthys) in which the snout is very rounded in lateral view.


  • Murray, A.M. 2016. Mid-Cretaceous acanthomorph fishes with the description of a new species from the Turonian of Lac des Bois, Northwest Territories, Canada. Vertebrate Anatomy Morphology Palaeontology 1(1): 101–115.PDFReference page