in light of available data, we can only affirm that D. ruber and D. latus Janiszewska, 1953 are very similar, ... [details]
We consider thus D. fuhrmanni as a valid species. It was previously synonymised with D. varicus. [details]
We .....consider D. parvus a distinct and valid species. Previously, it was considered a synonym of D. varicus. [details]