The Andaikhudag Formation, in older literature referred to as Unduruh Formation or Ondorukhaa Formation, is an Early Cretaceous (Hauterivian to Barremian) geologic formation in Mongolia. Dinosaur remains diagnostic to the genus level are among the fossils that have been recovered from the formation.

Fossil content

The following fossils have been reported from the lacustrine shales and secondary sandstones of the formation:

Birds

Insects

  • Hymenoptera Kotujisca kholbotensis Neoxyelula reducta Palaeoichneumon townesi
  • Diptera Syntemna tele Ulaia communis
  • Coleoptera Allophalerus bontsaganensis Tetraphalerus notatus
  • Plecoptera Accretonemoura radiata

See also

Bibliography

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  • Kopylov, D.S (2009), "A new subfamily of Ichneumonids from the Lower Cretaceous of Transbaikalia and Mongolia (Insecta: Hymenoptera: Ichneumonidae)", Paleontological Journal, 43 (1): 83–93, Bibcode:, doi:
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  • Kalugina, N.S (1993), Khaoboridy i Komary-zvontsy iz Mezozoya vostochnogo Zabaykal'ya (Diptera: Chaoboridae, Chironomidae). in, A. G. Ponomarenko (ed.), Mezozoyskie Nasekomye i Ostrakody Azii, pp. 117–139
  • Rasnitsyn, A.P (1993), Novye taksony sepulek (Vespida: Sepulcidae) in, A. G. Ponomarenko (ed.) Mezozoyskie Nasekomye i Ostrakody Azii, pp. 80–99
  • Rasnitsyn, A.P (1991), "Early Cretaceous evanimorphous hymenopteran families Stigmaphronidae and Cretevaniidae and the subfamily Kotujellitinae (Gasteruptiidae)", Paleontological Journal, 25: 172–179
  • Sinitshenkova, N.D (1987), "Istopicheskoe razvitie vesiyanok", Akademiya Nauk SSSR, Trudy Paleontologicheskogo Instituta, 221: 1–142