Body with rounded pleurotergite, not posteriorly produced, of pedigerous somite 5. Caudal rami 2.55 times as long as wide. Short medial spine on leg 1. Found only in Cenote Hubicu, Yucatan Peninsula, Mexico. Collected in depths between 1 and 15 meters, close to the cave walls.
Additional fauna includes calanoid copepods and ostracods.
The reduced antennule supports and hypothesis that Diacyclops are derived from some benthic ancestor resembling D. bernardi and D. hispidus Reid, 1988. However, two arguments indicate that D. chakan and D. puuc may share a common ancestor with a planktonic species. Reid, J.W. 1988. Reid, J.W. 1993. Please email us your comments and questions .