This species is so far only known from the single specimen collected in 2014 at the type locality in Bonn (Nordrhein-Westfalen). However, Heller and Rulik (2016) note that the COI gene sequence of that specimen matches sequences obtained from unidentified Ctenosciara specimens collected in New Zealand. The authors suggest that the new species either also occurs in New Zealand, or that a very similar species that does not differ in its COI sequence exists in New Zealand. When compared to all Ctenosciara species known from New Zealand Ctenosciara alexanderkoenigi is most similar to Ctenosciara nigrostyla Mohrig, 1999, but it differs in coloration and details of male genital morphology (Heller and Rulik 2016). Thus, if Ctenosciara alexanderkoenigi originally is a New Zealand species, it is still undiscovered in its home country. Heller and Rulik (2016) point out that the garden of the Museum Alexander Koenig where the new species was collected is home to a large number of exotic plants and thus there is the plausible possibility that Ctenosciara alexanderkoenigi is not a native German species, but has been introduced accidentally with ornamental plants.