Sulcusuchus

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Sulcusuchus
Temporal range: Late Campanian to Early Maastrichtian
~72  Ma
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Sulcusuchus erraini.png
Life restoration
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Superorder: Sauropterygia
Order: Plesiosauria
Superfamily: Plesiosauroidea
Family: Polycotylidae
Genus: Sulcusuchus
Gasparini & Spalletti 1990
Species:
S. erraini
Binomial name
Sulcusuchus erraini
Gasparini & Spalletti 1990

Sulcusuchus is a genus of polycotylid plesiosaur from the Late Campanian to Early Maastrichtian of Argentina.

Contents

Description

The type species Sulcusuchus erraini was named in 1990 by Zulma Brandoni de Gasparini and Luis Spalletti. It was at first considered to have been a dyrosaurid crocodile, hence its generic name: "trough crocodile". Its holotype, MPEF 650, was at Jacobacci, Río Negro Province, uncovered in a layer of the late Campanian-early Maastrichtian La Colonia Formation. It consists of a posterior left mandible fragment of about half a meter long with an associated jaw joint condyle of the skull, lower braincase, rear palate and middle snout fragment. The outer side of the mandible shows the trough, which would be exceptional for a crocodile. [1] The mandibula and pterygoids show grooves that may have housed electro-sensitive organs. [2] In 2025, a specimen of Sulcusuchus (MPEF-PV 11698) preserving 95 gastroliths was reported from the La Colonia Formation. [3]

See also

References

  1. Gasparini, Z., y Spalletti, L., 1990. "Un nuevo cocodrilo en depósitos mareales maastrichtianos de la Patagonia noroccidental", Ameghiniana27: 141–150
  2. O’Gorman, J.P. & Gasparini, Z., 2013, "Revision of Sulcusuchus erraini (Sauropterygia, Polycotylidae) from the Upper Cretaceous of Patagonia, Argentina", Alcheringa37: 161–174
  3. O'Gorman, J. P.; Aspromonte, F. R.; Matelo Mirco, G. (2025). "First record of lithophagy in Sulcusuchus erraini (Plesiosauria; Polycotylidae) with comments on the taphonomic and collect bias in gastroliths". Historical Biology: An International Journal of Paleobiology. doi:10.1080/08912963.2025.2548329.