Reptilia - Sauropterygia - Elasmosauridae

Full reference: S. P. Welles. 1962. A new species of elasmosaur from the Aptian of Colombia and a review of the Cretaceous plesiosaurs. University of California Publications in Geological Sciences 44(1):1-96

Sister taxa: none

Type specimen: UCMP 38349, a partial skeleton (skull and skeleton lacking distal part sof limbs, ilia, ischia and tail)

Ecology: aquatic carnivore