Coli Toro Formation

Coli Toro Formation
Stratigraphic range: Maastrichtian-Danian
TypeFormation
OverliesAngostura Colorada Formation
Lithology
PrimarySandstone
Location
Coordinates41°00′S 69°30′W / 41.0°S 69.5°W / -41.0; -69.5
Approximate paleocoordinates43°36′S 55°24′W / 43.6°S 55.4°W / -43.6; -55.4
RegionRío Negro Province
CountryArgentina
ExtentNeuquén Basin
Coli Toro Formation is located in Argentina
Coli Toro Formation
Coli Toro Formation (Argentina)

The Coli Toro Formation is a Maastrichtian-Danian geological formation in Argentina. Dinosaur remains are among the fossils that have been recovered from the formation, although none have yet been referred to a specific genus.[1] The rocks of the formation were deposited in a marine environment, in opposition to the marginal underlying sedimentary environment.

The formation in later publications has been reassigned as the Coli Toro Member at the basal levels of the Los Alamitos Formation, containing fossil remains of Sulcusuchus erraini.[2] The formation partly overlies the Angostura Colorada Formation.[3]

Fossil content

Dinosaurs from the Coli Toro Formation
Genus Species Location Stratigraphic Position Material Notes Images
Hadrosauridae indet.[4] Indeterminate Cerro Yeso Isolated caudal vertebrae Indeterminate hadrosaurid ornithopod
Titanosauria indet.[4] Indeterminate Cerro Yeso A tooth (MHJG-NCP, formerly 5/4/7-3) Indeterminate titanosaurian sauropod
Abelisauridae indet.[4] Indeterminate Estancia Yuquinche A tooth (MHJG-NCP 299) The first theropod from the Coli Toro Formation
Other reptiles from the Coli Toro Formation
Genus Species Location Stratigraphic Position Material Notes Images
Peirosauridae indet.?[4] Indeterminate Cerro Yeso A tooth (MHJG Pa 614 106) An indeterminate crocodyliform tooth, probably belonging to the notosuchian family Peirosauridae.
Sulcusuchus[4][5] S. erraini Cerro Yeso and near Laguna Cari-Laufquén Grande Teeth (Cerro Yeso) and a fragmentary mandibular ramus (Laguna Cari-Laufquén Grande) The only named polycotylid plesiosaur from the Southern Hemisphere, and the most recent one worldwide. Also found in La Colonia Formation.[6]
Testudines indet.[4] Indeterminate Cerro Yeso Turtle plates are reportly commonly found in the Cerro Yeso locality
FIsh from the Coli Toro Formation
Genus Species Location Stratigraphic Position Material Notes Images
Metaceratodus?[4] Indeterminate Cerro Yeso Dental plates A lungfish

See also

References

  1. ↑ Weishampel, et al. (2004). "Dinosaur distribution." Pp. 517-607.
  2. ↑ Cari-Laufqen Grande Pond at Fossilworks.org
  3. ↑ Ottone, 2009, p.377
  4. 1 2 3 4 5 6 7 Paulina-Carabajal, Ariana; Méndez, Ariel; Ulloa-Guaiquin, Karen; González-Dionis, Javier; Irazoqui, Facundo (2025). "The First Record of Theropod Dinosaur Remains From the Angostura Colorada and Coli Toro Formations (Campanian-Maatrichtian) in the Ingeniero Jacobacci Area (Rio Negro Province, Argentina)". Ameghiniana. doi:10.5710/AMGH.17.09.2025.3643.
  5. ↑ O’gorman, José P.; Gasparini, Zulma (2013-06-01). "Revision of Sulcusuchus erraini (Sauropterygia, Polycotylidae) from the Upper Cretaceous of Patagonia, Argentina". Alcheringa: An Australasian Journal of Palaeontology. 37 (2): 163–176. Bibcode:2013Alch...37..163O. doi:10.1080/03115518.2013.736788. hdl:11336/2489. ISSN 0311-5518.
  6. ↑ O’Gorman, José P.; Aspromonte, Franco R.; Matelo Mirco, Gonzalo (2025). "First record of lithophagy in Sulcusuchus erraini (Plesiosauria; Polycotylidae) with comments on the taphonomic and collect bias in gastroliths". Historical Biology. 0: 1–13. doi:10.1080/08912963.2025.2548329. ISSN 0891-2963.

Bibliography

Further reading

  • R. M. Casamiquela. 1964. Sobre un dinosaurio hadrosáurido de la Argentina. Ameghiniana 3(9):285-312
  • J. O'Gorman and Z. Gasparini. 2013. Revision of Sulcusuchus erraini (Sauropterygia, Polycotylidae) from the Upper Cretaceous of Patagonia, Argentina. Alcheringa 37(2):163-176
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