Tacuarembó Formation

Tacuarembó Formation
Stratigraphic range: Kimmeridgian ~155–151 Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓
Type	Geological formation
Sub-units	Batoví Member
Overlies	Buena Vista Formation
Lithology
Primary	Sandstone
Other	Siltstone, mudstone
Location
Coordinates	31.7°S 56.0°W / -31.7; -56.0
Approximate paleocoordinates	40.2°S 15.7°W / -40.2; -15.7
Region	Tacuarembó Department
Country	Uruguay
Extent	Norte Basin
Type section
Named for	Tacuarembó
Tacuarembó Formation (Uruguay)

The Tacuarembó Formation is a Late Jurassic (Kimmeridgian) geologic formation of the eponymous department in northern Uruguay. The fluvial to lacustrine sandstones, siltstones and mudstones preserve ichnofossils, turtles, crocodylomorphs, fish and invertebrates (bivalves and gastropods).

Fossil content

The following fossils have been reported from the formation:[1]

• Reptiles
  • Meridiosaurus vallisparadisi[2]
  • Tacuarembemys kusterae[3]
  • cf. Ceratosaurus sp.[4][5]
  • Coelurosauria indet.[6]
  • Mesoeucrocodylia indet.[7]
  • Testudines indet.[7]
  • Tacuarembemys[8]
  • Theropoda indet.[6]
  • Torvosaurus sp. ("Torvosaurus ingens")[9]
  • Tacuadactylus luciae[10]
• Fish
  • Arganodus tiguidiensis[7]
  • Asiatoceratodus tiguidiensis[7]
  • Mawsonia gigas[11]
  • Neoceratodus africanus[6]
  • Priohybodus arambourgi[12][13]
  • Halecostomi indet.[7]
  • Semionotiformes indet.[6]
• Bivalves
  • Diplodon sp.[7]
  • Tacuaremboia caorsii[14]
• Gastropods
  • Viviparidae indet.[7]
• Ichnofossils
  • Ornithopoda indet.[15]
  • Sauropoda indet.[15]
  • Theropoda indet.[15]

See also

• List of fossiliferous stratigraphic units in Uruguay

References

1. Tacuarembó Formation at Fossilworks.org
2. Fortier et al., 2011
3. Perea et al., 2014
4. Soto & Perea, 2008
5. Soto, Matías; Toriño, Pablo; Perea, Daniel (2020-11-01). "Ceratosaurus (Theropoda, Ceratosauria) teeth from the Tacuarembó Formation (Late Jurassic, Uruguay)". Journal of South American Earth Sciences. 103: 102781. Bibcode:2020JSAES.10302781S. doi:10.1016/j.jsames.2020.102781. ISSN 0895-9811. S2CID 224842133.
6. Perea et al., 2003
7. Soto & Perea, 2010
8. Perea, Daniel; Soto, Matías; Veroslavsky, Gerardo; Martínez, Sergio; Ubilla, Martín (2009). "A Late Jurassic fossil assemblage in Gondwana: Biostratigraphy and correlations of the Tacuarembó Formation, Parana Basin, Uruguay". Journal of South American Earth Sciences. 28 (2): 168–179. doi:10.1016/j.jsames.2009.03.009.
9. Soto, Matías; Toriño, Pablo; Perea, Daniel (2020-03-01). "A large sized megalosaurid (Theropoda, Tetanurae) from the late Jurassic of Uruguay and Tanzania". Journal of South American Earth Sciences. 98: 102458. Bibcode:2020JSAES..9802458S. doi:10.1016/j.jsames.2019.102458. ISSN 0895-9811. S2CID 213672502.
10. Soto, M.; Montenegro, F.; Mesa, V.; Perea, D. (2021). "A new ctenochasmatid (Pterosauria, Pterodactyloidea) from the late Jurassic of Uruguay". Journal of South American Earth Sciences. 111: 103472. doi:10.1016/j.jsames.2021.103472.
11. Toriño, Pablo; Soto, Matías; Perea, Daniel; Salgado De Carvalho, Marise Sardenberg (2021-04-01). "New findings of the coelacanth Mawsonia Woodward (Actinistia, Latimerioidei) from the Late Jurassic – Early Cretaceous of Uruguay: Novel anatomical and taxonomic considerations and an emended diagnosis for the genus". Journal of South American Earth Sciences. 107: 103054. doi:10.1016/j.jsames.2020.103054. ISSN 0895-9811.
12. Soto et al., 2012
13. Perea, Daniel; Ubilla, Martin; Rojas, Alejandra; Goso, Cesar A. (November 2001). "The West Gondwanan Occurrence Of The Hybodontid Shark Priohybodus, And The Late Jurassic-Early Cretaceous Age Of The Tacuarembo Formation, Uruguay". Palaeontology. 44 (6): 1227–1235. doi:10.1111/1475-4983.00222. ISSN 0031-0239.
14. Martinez, Sergio; Figueiras, Alfredo; da Silva, Jorge S. (1993). "A new Unionoidea (Mollusca, Bivalvia) from the Tacuarembó Formation (Upper Triassic–Upper Jurassic), Uruguay". Journal of Paleontology. 67 (6): 962–965. doi:10.1017/s0022336000025270. ISSN 0022-3360.
15. Mesa & Perea, 2015

Bibliography

• Mesa, V.; Perea, D. (2015), "First record of theropod and ornithopod tracks and detailed description of sauropod trackways from the Tacuarembó Formation (Late Jurassic–?Early Cretaceous) of Uruguay", Ichnos, 22 (2): 109–121, doi:10.1080/10420940.2015.1030075
• Perea, D.; Soto, M.; Sterli, J.; Mesa, V.; Torino, P.; Roland, G.; Da Silva, J. (2014), "Tacuarembemys kusterae, gen. et sp. nov., a new Late Jurassic-?earliest Cretaceous continental turtle from western Gondwana", Journal of Vertebrate Paleontology, 34 (6): 1329–1341, doi:10.1080/02724634.2014.859620, hdl:11336/21191
• Soto, M.; Perea, D.; Torino, P. (2012), "New remains of Priohybodus aramourgi (Hybodontiformes: Hybodontidae) from Late Jurassic-earliest Cretaceous deposits in Uruguay", Cretaceous Research, 35: 118–123, doi:10.1016/j.cretres.2011.12.001
• Fortier, D.; Perea, D.; Schultz, C. (2011), "Redescription and phylogenetic relationships of Meridiosaurus vallisparadisi, a pholidosaurid from the Late Jurassic of Uruguay", Zoological Journal of the Linnean Society, 163: S257 – S272, doi:10.1111/j.1096-3642.2011.00722.x
• Soto, M.; Perea, D. (2010), "Late Jurassic lungfishes (Dipnoi) from Uruguay, with comments on the systematics of Gondwanan ceradontiforms", Journal of Vertebrate Paleontology, 30 (4): 1049–1058, doi:10.1080/02724634.2010.483540
• Soto, M.; Perea, D. (2008), "A ceratosaurid (Dinosauria, Theropoda) from the Late Jurassic–Early Cretaceous of Uruguay", Journal of Vertebrate Paleontology, 28 (2): 439–444, doi:10.1671/0272-4634(2008)28[439:ACDTFT]2.0.CO;2
• Perea, D.; Ubilla, M.; Rojas, A. (2003), "First report of theropods from the Tacuarembó Formation (Late Jurassic–Early Cretaceous), Uruguay", Alcheringa, 27 (2): 79–83, doi:10.1080/03115510308619548
• Perea, D.; Ubilla, M.; Rojas, A.; Goso, C.A. (2001), "The West Gondwanan occurrence of the hybodontid shark Priohybodus, and the Late Jurassic–Early Cretaceous age of the Tacuarembó Formation, Uruguay", Palaeontology, 44 (6): 1227–1235, doi:10.1111/1475-4983.00222