Didymoconus

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Didymoconus
Temporal range: Early Oligocene
Holotype skull of D. colgatei
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Family: †Didymoconidae
Subfamily: †
Didymoconinae
Genus: †Didymoconus
Matthew & Granger, 1924
Type species
†Didymoconus colgatei
Matthew & Granger, 1924
Other species
  • †D. berkeyi Matthew & Granger, 1924
  • †D. gromovae Lopatin, 1997
  • †D. rostrata Gromova, 1960
Synonyms
  • †Tshelkaria Gromova, 1960

Didymoconus is an extinct genus of mammal that lived during the early Oligocene epoch. It was endemic to Asia, and its fossils have been found in Mongolia, China and Kazakhstan.[1] It is the type genus of the Didymoconidae, a family of eutherian mammals with uncertain taxonomic affinities.[2]

History of discovery

Fossilized remains of Didymoconus were first discovered during the Central Asiatic Expeditions of the American Museum of Natural History in the 1920s. In 1924, Matthew & Granger erected the genus with D. colgatei as the type species, while also erecting the species D. berkeyi. The holotype of D. colgatei is a skull (AMNH 19124), and two lower jaws (AMNH 19003 & 19004) were established as paratypes, while the type specimen of D. berkeyi is a set of lower jaws (AMNH 19001). All these specimens were collected from the Hsanda Gol Formation of Mongolia.[3]

Gromova (1960) erected the genus Tshelkaria with T. rostrata as the type species, the holotype for this species being collected from

junior synonym of Didymoconus. T. rostrata is now placed in Didymoconus as D. rostrata, while T. robusta is a junior synonym of D. colgatei.[2]

In 1997, Lopatin assigned a fourth species to the genus. Named Didymoconus gromovae, it is named after paleontologist V.I. Gromova. The holotype of this species is a fragment of the left

Chalkar-Teniz, Kazakhstan.[5]

References

  1. ISSN 0272-4634
    .
  2. ^
    ISSN 0077-7749
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  3. ^ Matthew, William Diller; Granger, Walter (1924-01-15). "New Carnivora from the Tertiary of Mongolia". American Museum Novitates (104).
  4. ^ Gromova, V.I. (1960). "A new family (Tshelkariidae) of primitive carnivores from the Oligocene of Asia". Trudy Paleontol. Inst. Akad. Nauk SSSR. 77: 41–78.
  5. ^ Lopatin, Alexey (January 1997). "New Oligocene Didymoconidae (Mesonychia, Mammalia) from Mongolia and Kazakhstan". Paleontological Journal. 31 (1): 108–119.
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