Genus Eugaster Serville, 1838

The systematic relationships within the genus Eugaster are difficult to understand. In a very detailed morphological study, Grzeschik (1969) combined the large variety of named forms into two species with several subspecies each. However, a first molecular study did not recover two distinct groups (Grzywacz et al. 2015). To our knowledge, syntopic occurrences of two (or more) named forms are not known.