The three additional specimens are part of the private amber collection maintained by George Poinar, Jr. from Oregon State University in Corvallis, Oregon, USA.
•
The type specimens are currently preserved in the paleoentomology collections housed in the American Museum of Natural History, located in Manhattan, New York City, USA.
The first species, D. grimaldii, was described by Olmi in 1995 from two specimens found in Dominican amber.