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Deinodon

March 17, 2024

Deinodon (Greek for "terrible tooth") is a dubious tyrannosaurid dinosaur genus containing a single species, Deinodon horridus. D. horridus is known only from a set of teeth found in the Late Cretaceous Judith River Formation of Montana and named by paleontologist Joseph Leidy in 1856.[1] These were the first tyrannosaurid remains to be described and had been collected by Ferdinand Vandeveer Hayden.[1] The teeth of Deinodon were slightly heterodont, and the holotype of Aublysodon can probably be assigned to Deinodon.[2]

Deinodon
Temporal range: Late Cretaceous, 77 Ma
↓
Lectotype tooth of D. horridus (specimen ASNP 9534)
Scientific classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Clade: Dinosauria
Clade: Saurischia
Clade: Theropoda
Family: †Tyrannosauridae
Subfamily: †Deinodontinae
Cope, 1866 emend Brown, 1914 sensu Matthew and Brown, 1922
Genus: †Deinodon
Leidy, 1856
Type species
†Deinodon horridus
Leidy, 1856
Synonyms

History and classification edit

 
Teeth assigned by Leidy

It is likely that the fossilized teeth of D. horridus belonged to the dinosaur later identified as Gorgosaurus libratus. In a 1922 study, William Diller Matthew & Barnum Brown found that the teeth of D. horridus and G. libratus were indistinguishable from each other, and that they almost certainly belonged to the same species. However, because D. horridus was not yet known from any skeletal remains, they refrained from formally declaring them to be synonyms.[3][4] In a 1970 review, Dale Russell stated that because the teeth of D. horridus could not be distinguished from either G. libratus or his newly described species Daspletosaurus torosus, it must be considered a nomen vanum ("empty name").[5] Since Russell published his opinion, most researchers have regarded Deinodon as a nomen dubium,[4] though some have argued that since Deinodon and Gorgosaurus cannot be distinguished, they should be synonymized with D. horridus as the valid name for "Gorgosaurus" skeletons.[6] Additionally, several researchers have agreed that the genus Aublysodon (including the species A. mirandus and A. lateralis), should also be considered a synonym of Deinodon, since it is based on incisor teeth that likely come from the same animal.[2][3][6] Lambe (1902) went further, and said that as originally named, Deinodon was not preoccupied, and instead, regarded Aublysodon as a nomen nudum.[2]

Description edit

Deinodon is known from a few, slightly heterodont teeth.[2]

A few phalanges, and a metatarsal with fragments of others, were found to be possibly assignable to D. horridus by Lambe in 1902.[2]

List of species and synonyms edit

Numerous species were referred to the genus Deinodon in the past. However, because most researchers now consider the genus and its type species nomina dubia, any additional species referred to the genus cannot be supported.

Name Author Year Combination author Combination year Status Notes
Deinodon horridus Leidy 1856 Leidy 1856 Nomen dubium, type species
Deinodon explanatus Cope 1876 Lambe 1902 Reclassified as Dromaeosaurus explanatus nomen dubium Originally Laelaps explanatus
Deinodon falculus Cope 1876 Osborn 1902 Reclassified as Dromaeosaurus falculus nomen dubium Originally Laelaps falculus
Deinodon incrassatus Cope 1876 Osborn 1902 Nomen dubium Originally Laelaps incrassatus
Deinodon lateralis Cope 1876 Hay 1902 Synonym of Deinodon horridus[citation needed] Originally Aublysodon lateralis
Deinodon cristatus Cope 1877 Osborn 1902 Synonym of Troodon formosus Originally Laelaps cristatus
Deinodon hazenianus Cope 1877 Osborn 1902 Nomen dubium Originally Laelaps hazenianus
Deinodon laevifrons Cope 1877 Osborn 1902 Reclassified as Dromaeosaurus laevifrons Originally Laelaps laevifrons
Deinodon amplus Marsh 1892 Hay 1902 Reclassified as Aublysodon amplus Originally Aublysodon amplus
Deinodon cristatus Marsh 1892 Hay 1902 Reclassified as Aublysodon cristatus Originally Aublysodon cristatus
Deinodon grandis Marsh 1890 Osborn 1916 Synonym of Deinodon horridus Originally Ornithomimus grandis
Deinodon sarcophagus Osborn 1905 Matthew & Brown 1922 Reclassified as Albertosaurus sarcophagus Originally Albertosaurus sarcophagus
Deinodon libratus Lambe 1914 Matthew & Brown 1922 Synonym of Gorgosaurus libratus Originally Gorgosaurus libratus
Deinodon arctunguis Parks 1928 Kuhn 1939 Synonym of Albertosaurus sarcophagus Originally Albertosaurus arctunguis
Deinodon novojilovi Maleev 1955 Maleev 1964 Synonym of Tarbosaurus bataar Originally Gorgosaurus novojilovi
Deinodon sternbergi Matthew & Brown 1923 Kuhn 1965 Synonym of Gorgosaurus libratus Originally Gorgosaurus sternbergi
Deinodon periculosus Riabinin 1930 Kuhn 1965 Synonym of Tarbosaurus periculosus Originally Albertosaurus periculosus
Deinodon lancensis Gilmore 1946 Kuhn 1965 Reclassified as Nanotyrannus lancensis Originally Gorgosaurus lancensis
Deinodon lancinator Maleev 1955 Kuhn 1965 Synonym of Tarbosaurus bataar Originally Gorgosaurus lancinator
Deinodon kenabekides Hay 1899 Olshevsky 1995 Synonym of Deinodon horridus Originally Dryptosaurus kenabekides

See also edit

References edit

  1. ^ a b Leidy, J. (1856). "Notices of the remains of extinct reptiles and fishes, discovered by Dr. F.V. Hayden in the badlands of the Judith River, Nebraska Territory." Proc. Acad. Nat. Sci., 8(2): 72.
  2. ^ a b c d e Lambe, L. (1902). "On Vertebrata of the Mid-Cretaceous of the North West Territory". 3 (4). Contributions to Canadian Palaeontology: 49. doi:10.5962/bhl.title.61817. {{cite journal}}: Cite journal requires |journal= (help)
  3. ^ a b Matthew, W.D. and Brown, B. (1922). "The family Deinodontidae, with notice of a new genus from the Cretaceous of Alberta." Bulletin of the American Museum of Natural History, 46(6): 367-385.
  4. ^ a b Carr, T. D. (1999). "Craniofacial ontogeny in Tyrannosauridae (Dinosauria, Coelurosauria)". Journal of Vertebrate Paleontology. 19 (3): 497–520. doi:10.1080/02724634.1999.10011161. S2CID 83744433.
  5. ^ Russell, D. (1970). "Tyrannosaurs from the Late Cretaceous of western Canada." National Museum of Natural Science Publications in Palaeontology, 1: 1–34.
  6. ^ a b Sahni, A. (1972). "The vertebrate fauna of the Judith River Formation, Montana." Bulletin of the AMNH, 147(6).

March 17, 2024
deinodon, greek, terrible, tooth, dubious, tyrannosaurid, dinosaur, genus, containing, single, species, horridus, horridus, known, only, from, teeth, found, late, cretaceous, judith, river, formation, montana, named, paleontologist, joseph, leidy, 1856, these,. Deinodon Greek for terrible tooth is a dubious tyrannosaurid dinosaur genus containing a single species Deinodon horridus D horridus is known only from a set of teeth found in the Late Cretaceous Judith River Formation of Montana and named by paleontologist Joseph Leidy in 1856 1 These were the first tyrannosaurid remains to be described and had been collected by Ferdinand Vandeveer Hayden 1 The teeth of Deinodon were slightly heterodont and the holotype of Aublysodon can probably be assigned to Deinodon 2 DeinodonTemporal range Late Cretaceous 77 Ma PreꞒ Ꞓ O S D C P T J K Pg N Lectotype tooth of D horridus specimen ASNP 9534 Scientific classificationDomain EukaryotaKingdom AnimaliaPhylum ChordataClade DinosauriaClade SaurischiaClade TheropodaFamily TyrannosauridaeSubfamily DeinodontinaeCope 1866 emend Brown 1914 sensu Matthew and Brown 1922Genus DeinodonLeidy 1856Type species Deinodon horridusLeidy 1856SynonymsMegalosaurus horridus Leidy 1856 Leidy 1857 Aublysodon horridus Leidy 1856 Cope 1868 Aublysodon lateralis Cope 1876 citation needed Dryptosaurus kenabekides Hay 1899 Deinodon lateralis Cope 1876 Hay 1902 citation needed Deinodon kenabekides Hay 1899 Olshevsky 1995 Contents 1 History and classification 2 Description 3 List of species and synonyms 4 See also 5 ReferencesHistory and classification edit nbsp Teeth assigned by LeidyIt is likely that the fossilized teeth of D horridus belonged to the dinosaur later identified as Gorgosaurus libratus In a 1922 study William Diller Matthew amp Barnum Brown found that the teeth of D horridus and G libratus were indistinguishable from each other and that they almost certainly belonged to the same species However because D horridus was not yet known from any skeletal remains they refrained from formally declaring them to be synonyms 3 4 In a 1970 review Dale Russell stated that because the teeth of D horridus could not be distinguished from either G libratus or his newly described species Daspletosaurus torosus it must be considered a nomen vanum empty name 5 Since Russell published his opinion most researchers have regarded Deinodon as a nomen dubium 4 though some have argued that since Deinodon and Gorgosaurus cannot be distinguished they should be synonymized with D horridus as the valid name for Gorgosaurus skeletons 6 Additionally several researchers have agreed that the genus Aublysodon including the species A mirandus and A lateralis should also be considered a synonym of Deinodon since it is based on incisor teeth that likely come from the same animal 2 3 6 Lambe 1902 went further and said that as originally named Deinodon was not preoccupied and instead regarded Aublysodon as a nomen nudum 2 Description editDeinodon is known from a few slightly heterodont teeth 2 A few phalanges and a metatarsal with fragments of others were found to be possibly assignable to D horridus by Lambe in 1902 2 List of species and synonyms editNumerous species were referred to the genus Deinodon in the past However because most researchers now consider the genus and its type species nomina dubia any additional species referred to the genus cannot be supported Name Author Year Combination author Combination year Status NotesDeinodon horridus Leidy 1856 Leidy 1856 Nomen dubium type speciesDeinodon explanatus Cope 1876 Lambe 1902 Reclassified as Dromaeosaurus explanatus nomen dubium Originally Laelaps explanatusDeinodon falculus Cope 1876 Osborn 1902 Reclassified as Dromaeosaurus falculus nomen dubium Originally Laelaps falculusDeinodon incrassatus Cope 1876 Osborn 1902 Nomen dubium Originally Laelaps incrassatusDeinodon lateralis Cope 1876 Hay 1902 Synonym of Deinodon horridus citation needed Originally Aublysodon lateralisDeinodon cristatus Cope 1877 Osborn 1902 Synonym of Troodon formosus Originally Laelaps cristatusDeinodon hazenianus Cope 1877 Osborn 1902 Nomen dubium Originally Laelaps hazenianusDeinodon laevifrons Cope 1877 Osborn 1902 Reclassified as Dromaeosaurus laevifrons Originally Laelaps laevifronsDeinodon amplus Marsh 1892 Hay 1902 Reclassified as Aublysodon amplus Originally Aublysodon amplusDeinodon cristatus Marsh 1892 Hay 1902 Reclassified as Aublysodon cristatus Originally Aublysodon cristatusDeinodon grandis Marsh 1890 Osborn 1916 Synonym of Deinodon horridus Originally Ornithomimus grandisDeinodon sarcophagus Osborn 1905 Matthew amp Brown 1922 Reclassified as Albertosaurus sarcophagus Originally Albertosaurus sarcophagusDeinodon libratus Lambe 1914 Matthew amp Brown 1922 Synonym of Gorgosaurus libratus Originally Gorgosaurus libratusDeinodon arctunguis Parks 1928 Kuhn 1939 Synonym of Albertosaurus sarcophagus Originally Albertosaurus arctunguisDeinodon novojilovi Maleev 1955 Maleev 1964 Synonym of Tarbosaurus bataar Originally Gorgosaurus novojiloviDeinodon sternbergi Matthew amp Brown 1923 Kuhn 1965 Synonym of Gorgosaurus libratus Originally Gorgosaurus sternbergiDeinodon periculosus Riabinin 1930 Kuhn 1965 Synonym of Tarbosaurus periculosus Originally Albertosaurus periculosusDeinodon lancensis Gilmore 1946 Kuhn 1965 Reclassified as Nanotyrannus lancensis Originally Gorgosaurus lancensisDeinodon lancinator Maleev 1955 Kuhn 1965 Synonym of Tarbosaurus bataar Originally Gorgosaurus lancinatorDeinodon kenabekides Hay 1899 Olshevsky 1995 Synonym of Deinodon horridus Originally Dryptosaurus kenabekidesSee also edit nbsp Dinosaurs portalTimeline of tyrannosaur researchReferences edit a b Leidy J 1856 Notices of the remains of extinct reptiles and fishes discovered by Dr F V Hayden in the badlands of the Judith River Nebraska Territory Proc Acad Nat Sci 8 2 72 a b c d e Lambe L 1902 On Vertebrata of the Mid Cretaceous of the North West Territory 3 4 Contributions to Canadian Palaeontology 49 doi 10 5962 bhl title 61817 a href Template Cite journal html title Template Cite journal cite journal a Cite journal requires journal help a b Matthew W D and Brown B 1922 The family Deinodontidae with notice of a new genus from the Cretaceous of Alberta Bulletin of the American Museum of Natural History 46 6 367 385 a b Carr T D 1999 Craniofacial ontogeny in Tyrannosauridae Dinosauria Coelurosauria Journal of Vertebrate Paleontology 19 3 497 520 doi 10 1080 02724634 1999 10011161 S2CID 83744433 Russell D 1970 Tyrannosaurs from the Late Cretaceous of western Canada National Museum of Natural Science Publications in Palaeontology 1 1 34 a b Sahni A 1972 The vertebrate fauna of the Judith River Formation Montana Bulletin of the AMNH 147 6 Retrieved from https en wikipedia org w index php title Deinodon amp oldid 1146157553, wikipedia, wiki, book, books, library,

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