Open main menu

Necrosuchus is an extinct genus of caiman from the Paleocene epoch (Selandian age, about 60 million years ago).[1][2]

Temporal range: Early Paleocene (Peligran)
~62.5–59.0 Ma
Necrosuchus ionensis.jpg
Artist's restoration
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Order: Crocodilia
Family: Alligatoridae
Subfamily: Caimaninae
Genus: Necrosuchus
Simpson, 1937
Type species
N. ionensis
Simpson, 1937


Necrosuchus had a long jaw, with slender teeth. The first two sets of teeth was large, the third is smaller, the fourth very large, the fifth through 10th small, the 11th through 13th increasing in size, with the 13th being nearly as large as the fourth, the remaining 14th through 18th teeth decrease in size.[3]


Fossils of N. ionensis have been found in the Salamanca Formation near Malaspina, Chubut, in Argentina.[3]


Gaylord explains the meaning of the generic name as being a compound word of "necros" meaning "dead," and "suchus" meaning crocodile, in reference to during its collection, "a well-meaning lady asked if it were dead."[3]


  1. ^ Necrosuchus at
  2. ^ Brochu, C.A. (2011). "Phylogenetic relationships of Necrosuchus ionensis Simpson, 1937 and the early history of caimanines". Zoological Journal of the Linnean Society. 163: S228–S256. doi:10.1111/j.1096-3642.2011.00716.x.
  3. ^ a b c (PDF) Retrieved 4 March 2017. Missing or empty |title= (help)