Named By: Gasparini and Spalletti - 1990.
Classification: Chordata, Reptilia, Sauropterygia, Plesiosauroidea, Polycotylidae.
Species: S. erraini (type).
Size: Roughly estimated to grow between 9 to 9.5 meters long.
Known locations: Argentina.
Time period: Campanian of the Cretaceous.
Fossil representation: Single specimen.
Although the last part of the name ‘suchus’ is ancient Greek for crocodile, Sulcusuchus was actually a plesiosaur, a member of the famous group of long necked marine reptiles of the Mesozoic. In more specific terms it is considered to be a polycotylid plesiosaur, with one of the more famous members of this group being Dolichorhynchops. Like with its close relatives, Sulcusuchus is noted for having a proportionately short neck with jaws longer than most other types of plesiosaur. Other late Cretaceous plesiosaurs known from South America include Aristonectes, although this was quite different from Sulcusuchus.
- Un nuevo cocodrilo en los depositos mareales Maastrichtianos de la Patagonia noroccidental. Ameghiniana 27(1-2):141-150 - Z. Gasparini & L. A. Spalletti - 1990.
- Revision of Sulcusuchus erraini (Sauropterygia, Polycotylidae) from the Upper Cretaceous of Patagonia, Argentina. - Alcheringa 37: 161–174. - J. P. O’Gorman & Z. Gasparini - 2013.