Caiman is a genus of reptile in the Alligatoridae family. They are found in Central and South America, and differ from the alligator by the absence of a bony septum between the nostrils, and the ventral armour is composed of overlapping bony scutes, each of which is formed of two parts united by a suture. Caimans tend to be more agile and crocodile-like in their movements, and have longer, sharper teeth than alligators. Although the Caiman has not been studied in-depth, scientists have learned that their mating cycles (previously thought to be spontaneous or year-round) are linked to the rainfall cycles and the river levels, which increases chances of survival for their offspring.
In Caiman the dura covering the medullary region of the brain is proportionally thicker than the dura covering the forebrain, although this might not impact the ratio in volume between the regions.
The genus contains three extant species, two extant subspecies and two extinct species:
- ^ "Allometric Comparison," Larsson (2001). Page 26.
- Larsson, H.C.E. 2001. Endocranial anatomy of Carcharodontosaurus saharicus (Theropoda: Allosauroidea) and its implications for theropod brain evolution. pp. 19–33. In: Mesozioc Vertebrate Life. Ed.s Tanke, D. H., Carpenter, K., Skrepnick, M. W. Indiana University Press.