Английская Википедия:Ergilin Dzo Formation

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Шаблон:Short description Шаблон:Infobox rockunit

The Ergilin Dzo Formation (formerly known as the Ardyn Obo Formation), is a geologic formation in southeastern Mongolia. It preserves fossils of a wide variety of animals, which date back to the late Eocene epoch. The type fauna of the Ergilian Asian land mammal age is defined by the mammalian fossils of this formation.[1]

Depositional environment

Based on the presence of brontotheres and the abundance of herbivorous low-crowned mammals, the Ergilin Dzo Formation has been estimated to be humid and warm/hot with a relatively-closed area.[2][3] However, the absence of primates and rarity of crocodyliforms (known from one specimen currently) in this formation may suggest the paleoenvironment had open areas and was more arid than similarly aged faunal assemblages from elsewhere in Eurasia.[1] Sedimentary analyses suggest the Ergilin Dzo Formation was a floodplain environment with a braided stream network formed by fluvial systems.[4]

Fossil content

In their review of the vertebrate fauna of the formation, Tsubamoto et al. (2022) found that 77 genera and 104 species of vertebrate have been reported from the Ergilin Dzo Formation, representing 22 orders and 49 families. Fossils of mammals, reptiles (including birds), fish and amphibians have all been recovered from the formation since the early 20th Century.[1]

Mammals

81 mammal species have been found in the Ergilin Dzo Formation, with perissodactyls being the most diverse group (33 species reported). Ruminant artiodactyls, rhinocerotoids and brontotheres are the most abundant groups in terms of collected specimen numbers.[1]

Artiodactyls

Artiodactyls reported from the Ergilin Dzo Formation
Genus Species Presence Stratigraphic member Material Notes Images
Anthracotheriidae indet. Indeterminate Ergilin Dzo locality.[5] Left astragalus.[5] An anthracothere.
cf. Bothriodon cf. B. sp. Ergilin Dzo & Khoer Dhan localities.[5] Jaw & limb elements.[5] An anthracothere.
Brachyhyops B. trofimovi Khoer Dzhan locality.[6] Jaw elements.[6] An entelodontid.
B. sp. Ergilin Dzo locality.[6] Right maxilla fragment.[6] An entelodontid.
Entelodon E. gobiensis Khoer Dzhan & Ergilin Dzo localities.[6][7] An entelodontid.
Eumeryx E. sp. A deer.
Gobiomeryx G. dubius A leptomerycid.
Lophiomeryx L. angarae A lophiomerycid.
L. sp. A lophiomerycid.
Miomeryx M. altaicus A leptomerycid.
M. sp. A leptomerycid.
Praetragulus P. electus Khoer Dzhan locality.[8] Numerous jaw & limb elements.[8] A hypertragulid.
P. gobiae Ergilin Dzo locality.[8] Jaw elements.[8] A hypertragulid.

Cimolestans

Cimolestans reported from the Formation
Genus Species Presence Stratigraphic member Material Notes Images
Gobiopithecus G. khan Khoer Dzhan locality.[9][10] Ergilin Member.[9] Mandibles.[10] A pantolestid.

Didymoconids

Didymoconids reported from the Ergilin Dzo Formation
Genus Species Presence Stratigraphic member Material Notes Images
Ardynictis A. furunculus Skull & jaws.[11]
Ergilictis E. reshetovi Ergilin Dzo locality.[12] Jaw elements.[12]

Eulipotyphlans

Eulipotyphlans reported from the Ergilin Dzo Formation
Genus Species Presence Stratigraphic member Material Notes Images
Amphechinus A. sp. Ergilin Dzo locality.[13] Sevkhul Member.[13] Left dentary fragment.[13] A hedgehog.
Ictopidium? I.? sp. A changlelestid.
Oligochenus O. grandis Ergilin Dzo locality.[13] Sevkhul Member.[13] Right dentary fragment.[13] A gymnure.
Palaeoscaptor? P.? sp. A hedgehog.
Soricinae indet. Indeterminate A shrew.
Tupaiodontinae indet. Indeterminate Ergilin Dzo locality.[13] Ergilin Member.[13] Premolar.[13] A changlelestid.

Ferae

Ferae reported from the Ergolin Dzo Formation
Genus Species Presence Stratigraphic member Material Notes Images
Alagtsavbaatar A. indigenus Alag Tsav & Khoer Dzhan localities.[14] Jaw & limb elements.[14] A small feliform.
Amphicyonidae indet. Indeterminate Ergilin Dzo locality.[15] Tooth.[15] A bear-dog.
Asiavorator A. gracilis Ergilin Dzo locality.[14] Right mandible fragment.[14] A small feliform.
Eofelis E. sp. Khoer Dzhan locality.[14] Jaw elements.[14] A nimravid.
Hyaenodon H. chunkhtensis Khoer Dzhan locality.[16][17] Left mandibular corpus.[16] A hyaenodont.
H. eminus Khoer Dzhan & Ergilin Dzo localities.[16] Jaw elements.[11] A hyaenodont.
H. gigas Khoer Dzhan locality.[16] A hyaenodont.
H. incertus Khoer Dzhan & Ergilin Dzo localities.[16] A hyaenodont.
H. mongoliensis Khoer Dzhan & Ergilin Dzo localities.[16] A hyaenodont.
H. pervagus Khoer Dzhan & Ergilin Dzo localities.[16] A hyaenodont.
H. pumilus Mandibular ramus.[17] A hyaenodont.
Nimravus N. mongoliensis Khoer Dzhan locality.[14] Jaw & limb elements.[14] A nimravid.
Proviverrinae indet. Indeterminate Khoer Dzhan locality.[16] Tooth.[16] A hyaenodont.

Gliriformes

Gliriformes reported from the Ergilin Dzo Formation
Genus Species Presence Stratigraphic member Material Notes Images
Ardynomys A. olseni Lower jaw.[11] A rodent.
A. silentiumis A rodent.
A. sp. A rodent.
Desmatolagus D. ardynense A lagomorph.
D. gobiensis A lagomorph.
D. robustus Lower jaws.[11] A lagomorph.
Eucricetodon E. sp. A rodent.
Lagomorpha indet. Indeterminate A lagomorph.
Zofiagale Z. ergilensis Ergilin Dzo locality.[18] Right dentary.[18] An anagalid.

Mesonychians

Mesonychians reported from the Ergilin Dzo Formation
Genus Species Presence Stratigraphic member Material Notes Images
Metahapalodectes M. sp. A hapalodectid.
Mongolestes M. hadrodens A mesonychid.

Perissodactyls

Perissodactyls reported from the Ergilin Dzo Formation
Genus Species Presence Stratigraphic member Material Notes Images
cf. Allacerops cf. A. sp. Khoer Dzhan.[19] Jaw elements.[19] An eggysodontid.
Amynodon A. sp. An amynodont.
Amynodontopsis A. lunanensis An amynodont.
Ardynia A. praecox Khoer Dzhan.[19] Sevkhul & Ergilin members.[19] Jaw elements.[19] A hyracodontid.
A. sp. Khoer Dzhan.[19] Sevkhul & Ergilin members.[19] Jaw fragments.[19] A hyracodontid.
Armania A. asiana Khoer Dzhan & Ergilin Dzo.[19] Sevkhul & Ergilin Members.[19] Jaw elements.[19] A hyracodontid.
Brontotheriidae indet. Indeterminate A brontothere.
Cadurcodon C. ardynensis An amynodont.
C. sp. An amynodont.
Cadurcotherium C. progressus An amynodont.
cf. Deperetella cf. D. sp. A deperetellid.
Embolotherium E. andrewsi Skull.[20] A brontothere.
E. grangeri Khoer Dzhan.[20] Partial skull.[20] A brontothere.
E. sp. A brontothere.
Eomoropus E. sp. An eomoropid.
Eubrontotherium E. clarnoensis Ergilin Dzo.[20] Partial skeleton.[20] A brontothere.
Juxia J. borissiaki Ergilin Dzo locality.[19] Ergilin Member.[19] Jaws & teeth.[19] A paraceratheriid.
cf. Nasamplus cf. N. progressus A brontothere.
Paraceratheriidae indet. Indeterminate Khoer Dzhan.[19] Ergilin Member.[19] Teeth.[19] Initially reported as Urtinotherium (or Paraceratherium) sp.
Paraceratherium P. parvum A paraceratheriid.
Paracolodon P. inceptus A helaletid.
P. sp. A helaletid.
Prohyracodon P. meridionalis Khoer Dzhan.[19] Sevkhul Member.[19] Jaw elements.[19] A hyracodontid.
P. obrutschewi A hyracodontid.
?P. parvum Khoer Dzhan.[19] Zangut-Sevkhul member.[19] Jaw elements.[19] A hyracodontid.
Protembolotherium P. efremovi Ergilin Dzo.[20] Skull elements.[20] A brontothere.
Ronzotherium R. brevirostris A rhino.
R. orientale Ergilin Dzo, Bayan Tsav ravine & Khoer Dzhan.[19] Ergilin Member.[19] Jaw elements.[19] A rhino.
R. sp. Khoer Dzhan.[19] Ergilin Member.[19] Fragment of mandibular ramus.[19] A rhino.
Schizotherium S. avitum A chalicothere.
Sharamynodon S. mongoliensis An amynodont.
Teleolophus T. magnus A deperetellid.
cf. Zaisanamynodon cf. Z. sp. An amynodont.

Reptiles

Reptiles are represented by 20 known species in the formation, with 11 of these being birds.[1]

Birds

Birds reported from the Ergilin Dzo Formation
Genus Species Presence Stratigraphic member Material Notes Images
Accipitridae indet. Indeterminate Khoer Dzhan.[21] Leg bones.[21] An accipitrid.
Anatidae indet. Indeterminate Khoer Dzhan.[21] An anatid.
Ardeidae indet. Indeterminate Khoer Dzhan.[21] A heron.
Cygninae indet. Indeterminate Khoer Dzhan.[21] A swan.
Eogrus E. sp. Ergilin Dzo.[21] An eogruid.
Ergilornis E. minor Ergilin Dzo.[21] An eogruid.
E. rapidus Ergilin Dzo.[21] An eogruid.
E. sp. An eogruid.
Lari indet. Indeterminate Khoer Dzhan.[21] Skull fragment.[21] A shorebird.
Rallidae indet. Indeterminate Khoer Dzhan.[21] A rail.
Sonogrus S. gregalis An eogruid.

Crocodyliforms

Crocodyliforms reported from the Ergilin Dzo Formation
Genus Species Presence Stratigraphic member Material Notes Images
Crocodyliformes indet. Indeterminate Ergilin Dzo.[22] Tooth.[22]

Squamates

Squamates reported from the Ergilin Dzo Formation
Genus Species Presence Stratigraphic member Material Notes Images
Agamidae indet. Indeterminate An agamid lizard.
Lacertilia indet. Indeterminate A lizard.

Turtles

Turtles reported from the Ergilin Dzo Formation
Genus Species Presence Stratigraphic member Material Notes Images
Chrysemys C. sp.
Emydidae gen. et. sp. indet. Indeterminate A terrapin.
Ergilemys E. insolitus A tortoise.
?Melanochelys ?M. elongata
Platysternidae gen. et. sp. indet. Indeterminate
Trionychidae gen. et. sp. indet. Indeterminate A softshell turtle.

Amphibians

Amphibians reported from the Ergilin Dzo Formation
Genus Species Presence Stratigraphic member Material Notes Images
Urodela gen. et. sp. indet. Indeterminate A salamander.

Fish

Fish reported from the Formation
Genus Species Presence Stratigraphic member Material Notes Images
Amia A. sp. A bowfin.
Parasilurus P. sp. A catfish.

See also

Шаблон:Portal

References

Шаблон:Reflist

Партнерские ресурсы
Криптовалюты
Магазины
Хостинг
Разное

  1. ↑ 1,0 1,1 1,2 1,3 1,4 Шаблон:Cite journal
  2. ↑ Шаблон:Cite book
  3. ↑ Шаблон:Cite journal
  4. ↑ Шаблон:Cite journal
  5. ↑ 5,0 5,1 5,2 5,3 Шаблон:Cite journal
  6. ↑ 6,0 6,1 6,2 6,3 6,4 Шаблон:Cite journal
  7. ↑ Шаблон:Cite journal
  8. ↑ 8,0 8,1 8,2 8,3 Шаблон:Cite book
  9. ↑ 9,0 9,1 Шаблон:Cite journal
  10. ↑ 10,0 10,1 Шаблон:Cite journal
  11. ↑ 11,0 11,1 11,2 11,3 Шаблон:Cite journal
  12. ↑ 12,0 12,1 Шаблон:Cite journal
  13. ↑ 13,0 13,1 13,2 13,3 13,4 13,5 13,6 13,7 13,8 Шаблон:Cite journal
  14. ↑ 14,0 14,1 14,2 14,3 14,4 14,5 14,6 14,7 Шаблон:Cite journal
  15. ↑ 15,0 15,1 Шаблон:Cite journal
  16. ↑ 16,0 16,1 16,2 16,3 16,4 16,5 16,6 16,7 16,8 Шаблон:Cite journal
  17. ↑ 17,0 17,1 Шаблон:Cite journal
  18. ↑ 18,0 18,1 Шаблон:Cite journal
  19. ↑ 19,00 19,01 19,02 19,03 19,04 19,05 19,06 19,07 19,08 19,09 19,10 19,11 19,12 19,13 19,14 19,15 19,16 19,17 19,18 19,19 19,20 19,21 19,22 19,23 19,24 19,25 19,26 19,27 19,28 Шаблон:Cite journal
  20. ↑ 20,0 20,1 20,2 20,3 20,4 20,5 20,6 Шаблон:Cite journal
  21. ↑ 21,00 21,01 21,02 21,03 21,04 21,05 21,06 21,07 21,08 21,09 21,10 Шаблон:Cite journal
  22. ↑ 22,0 22,1 Шаблон:Cite journal
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