Earth:Melovatka Formation
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| Melovatka Formation Stratigraphic range: Middle Cenomanian ~99–95 Ma | |
|---|---|
 The Melovatka Formation in 1941 | |
| Type | Geological formation |
| Lithology | |
| Primary | Phosphorite |
| Other | Sandstone |
| Location | |
| Coordinates | [ ⚑ ] : 50°54′N 44°42′E / 50.9°N 44.7°E |
| Paleocoordinates | [ ⚑ ] 43°06′N 38°48′E / 43.1°N 38.8°E |
| Region | Volgograd Oblast |
| Country | Russia |
| Extent | Saratov |
| Type section | |
| Named for | Melovatka |
  Melovatka Formation (Russia)  Melovatka Formation (Volgograd Oblast) | |
The Melovatka or Melovatsskaya Formation is a Cenomanian geologic formation in Russia. Pterosaur fossils have been recovered from the formation.
Description
The two phosphorite horizons are separated in places by a yellowish sand interbed up to 1 m thick; however, they sometimes merge into a single horizon. The lower interbed or part of the integrated phosphorite horizon shows in places straight diagonal bedding, which is manifested in the orientation of almost flat pellets, pebbles, and pseudomorphs on bivalve shells. The phosphate concretions are irregular aggregates and rounded pebbles, ranging in size from several millimeters to 5–10 cm. They are dark brown or nearly black.[1]
Fossil content
The following vertebrate fossils were reported from the formation:[1][2]
- Archaeolamna cf. kopingensis
- Anomotodon principalis
- Cerebavis cenomanica[3]
- Cretolamna appendiculata
- C. ex gr. borealis
- Cretoxyrhina vraconensis[4]
- C. denticulata
- Cantioscyllium cf. decipiens
- Cretodus sp.[5]
- Carcharias? sp.
- Dwardius woodwardi
- Edaphodon sedgwicki
- Elasmodectes kiprijanoffi
- Elasmodus sinzovi
- Eostriatolamia subulata
- Galeorhinus glickmani
- Ischyodus latus
- Johnlongia allocotodon
- Megarhizodon cf. macrorhiza
- Meristodonoides sp.[6]
- Paraorthacodus recurvus
- Pseudomegachasma casei
- Pseudoscapanorhynchus cf. compressidens
- Protolamna sokolovi
- Ptychodus decurrens
- P. mammillaris
- Polyacrodus sp.
- Scapanorhynchus raphiodon[7]
- S. minimus
- Synechodus dispar
- Lonchodectes sp.[8]
- Odontaspis sp.
- Orectoloboides parvulus[9]
- Palaeoanacorax volgensis
- P. obliquus
- Polyacrodus sp.
- Pseudoisurus denticulatus (=? Dwardius sp.)
- Saratovia glickmani[10]
- Squalicorax falcatus
- S. curvatus
- Squatina sp.
- ?Platypterygius sp.
- Pervushovisaurus campylodon (previously Platypterygius kiprianoffi)[11]
- Chelonioidea indet.
- Chimaeridae indet.
- Elasmosauridae indet.[12]
- Enchodontidae indet.
- Hybodontiformes indet.
- Ichthyornithes indet.[13][14]
- Ornithocheiroidea indet.[15]
- Osteichthyes indet.
- Pliosauridae indet.
- Plesiosauria indet.
- Targaryendraconia indet.[16]
See also
- List of pterosaur-bearing stratigraphic units
- List of fossiliferous stratigraphic units in Russia
References
- ↑ 1.0 1.1 Melovatka 3 at Fossilworks.org
- ↑ PBDB collection. https://paleobiodb.org/classic/displayCollResults?taxon_no=81365&max_interval=Cretaceous&country=Russian%20Federation&is_real_user=1&basic=yes&type=view&match_subgenera=1
- ↑ Walsh, S A.; Milner, A. C.; Bourdon, E., 2016. https://pmc.ncbi.nlm.nih.gov/articles/PMC4948046/
- ↑ Бирюков А. В. ЭЛАСМОБРАНХИИ СЕНОМАНА ПОВОЛЖЬЯ: РАЗНООБРАЗИЕ,ПАЛЕОБИОГЕОГРАФИЯ И СТРАТИГРАФИЧЕСКОЕ ЗНАЧЕНИЕ (с.126 - 197) https://www.paleo.ru/upload/medialibrary/fb0/2e8uj17p680gn4xwqfpm0a68u4lchbnd.pdf
- ↑ https://www.ammonit.ru/tag/9476.htm%7C
- ↑ https://www.paleo.ru/upload/medialibrary/7f1/ie9a2gnkcuvdof0qpafxmj9xkckh96i1.pdf
- ↑ Saratov (upper horizon): Cenomanian at Fossilworks.org
- ↑ Alexander Averianov, E. N. Kurochkin, 2010. https://www.researchgate.net/publication/226217045_A_new_pterosaurian_record_from_the_Cenomanian_of_the_Volga_Region
- ↑ E. N. Kurochkin, S. V. Saveliev, A. A. Postnov, Evgeniy Pervushov, 2006. https://www.researchgate.net/publication/227213778_On_the_brain_of_a_primitive_bird_from_the_Upper_Cretaceous_of_European_Russia
- ↑ Averianov, A. O. (2025). "A new ornithocheiran pterosaur from the Upper Cretaceous (Cenomanian) of Saratov, Russia". Anais da Academia Brasileira de Ciências 97 (Suppl. 1): e20241063. doi:10.1590/0001-3765202520241063. PMID 40298668.
- ↑ Mesozoic marine reptiles of Russia and other former Soviet Republics". The Age of Dinosaurs in Russia and Mongolia. Cambridge, UK: Cambridge University Press. 2000. pp. 187–210.
- ↑ Evgeniy Pervushov, Maxim Savvich Arkhangelsky, Ivanov A.V., 1999. https://undor-muz.ru/wp-content/uploads/2019/08/Pervushov.et_.alii_.1999.Katalog.mestonahozhdenij.morskih.reptilij.J-K.Povolzhja.pdf
- ↑ Nikita V. Zelenkov, Alexander O. Averianov, Evgeny V. Popov, 2017. https://www.sciencedirect.com/science/article/abs/pii/S0195667116303731
- ↑ Никита Зеленков, 2017. Elementy.ru https://elementy.ru/kartinka_dnya/307/Povolzhskiy_ikhtiornis
- ↑ Alexander Averianov, E.N. Kurochkin, Evgeniy Pervushov, A.V. Ivanov, 2005. https://www.researchgate.net/publication/285969296_Two_bone_fragments_of_ornithocheiroid_pterosaurs_from_the_Cenomanian_of_Volgograd_Region_southern_Russia
- ↑ Averianov, A. O.; Gubarev, D. I. (2026). "A pterosaur cervical vertebra from the Cenomanian of Russia: first diagnostic postcranial material for Targaryendraconia". Historical Biology: An International Journal of Paleobiology. doi:10.1080/08912963.2026.2619532.
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