Andaikhudag Formation

Andaikhudag Formation
Stratigraphic range: Hauterivian-Barremian ~132–125  Ma PreꞒ Ꞓ O S D C P T J K Pg N
Type	Geological formation
Lithology
Primary	Shale
Other	Sandstone
Location
Coordinates	46°00′N99°36′E / 46.0°N 99.6°E / 46.0; 99.6
Approximate paleocoordinates	47°12′N100°18′E / 47.2°N 100.3°E / 47.2; 100.3
Region	Bayankhongor Province
Country	Mongolia
Andaikhudag Formation (Mongolia)

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. ^[1] Dinosaur remains diagnostic to the genus level are among the fossils that have been recovered from the formation. ^[2]

Fossil content

The following fossils have been reported from the lacustrine shales and secondary sandstones of the formation: ^[1]

Birds

• Ambiortus dementjevi ^[3] - "Vertebrae and forelimb" ^[4]
• Holbotia ponomarenkoi ^[5]

Insects

• Hymenoptera
  • Kotujisca kholbotensis ^[6]
  • Neoxyelula reducta ^[7]
  • Palaeoichneumon townesi ^[8]
• Diptera
  • Syntemna tele ^[9]
  • Ulaia communis ^[10]
• Coleoptera
  • Allophalerus bontsaganensis ^[11]
  • Tetraphalerus notatus ^[11]
• Plecoptera
  • Accretonemoura radiata ^[12]

See also

• List of dinosaur-bearing rock formations
  • List of stratigraphic units with few dinosaur genera
• Tsagaantsav Formation

References

1. Andaikhudag Formation in the Paleobiology Database
2. Weishampel et al., 2004, pp.517-607
3. Kurochkin, 2000
4. "Table 11.1," in Weishampel et al., 2004, p.214
5. Zelenkov & Averianov, 2015
6. Rasnitsyn, 1991
7. Rasnitsyn, 1993
8. Kopylov, 2009
9. Blagoderov, 2000
10. Kalugina, 1993
11. Ponomarenko, 1997
12. Sinitshenkova, 1987

Bibliography

• Zelenkov, Nikita V.; Averianov, Alexander O. (2015), "A historical specimen of enantiornithine bird from the Early Cretaceous of Mongolia representing a new taxon with a specialized neck morphology", Journal of Systematic Palaeontology , 14 (4): 319–338, doi:10.1080/14772019.2015.1051146
• 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:2009PalJ...43...83K, doi:10.1134/S0031030109010092
• Weishampel, David B.; Dodson, Peter; Osmólska, Halszka (2004), The Dinosauria, 2nd edition, Berkeley: University of California Press, pp. 1–880, ISBN   0-520-24209-2 , retrieved 2019-02-21
• Blagoderov, V.A (2000), "New fungus gnats (Diptera: Mycetophilidae) from the Cretaceous and Paleogene of Asia", Paleontological Journal , 34: S355 –S359
• Kurochkin, E.N (2000), Mesozoic birds of Mongolia and the former USSR in M. J. Benton, M. A. Shishkin, D. M. Unwin, & E N. Kurichkin (eds.), The Age of Dinosaurs in Russia and Mongolia, pp. 533–559
• Ponomarenko, A.G (1997), "New beetles of the family Cupedidae from the Mesozoic of Mongolia - Ommatini, Mesocupedini, Priacmini", Paleontological Journal , 31: 389–399
• 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