Original and used names: Allodia obscura Winnertz, 1864:826.
Swedish sources: Stigmatomeria obscura: Kjærandsen et al. 2007:76 [Nemoral — •SK•].
World distribution: European; confirmed from Germany (type material) and Sweden, but probably more widespread and overlooked due to synonymy with S. crassicornis.
Remarks: Synonymy with Stigmatomeria crassicornis was suggested by Tuomikoski (1966) and implemented by Chandler (2005) and Zaitzev (2003). The studied Swedish material, however, consists of two distinct species. One has a stout gonostylus (S. crassicornis) and one has a much more slender gonostylus (S. obscura), corresponding well to the descriptions given by Winnertz (1863). Further, forms with apparently very slender gonostylus appear in illustrations by Ostroverkhova (1979 fig. 37.1 & 37.3) as both Brevicornu (S.) crassicornis and B. (S.) obscura, and more distinctly in figures by Krivosheina et al. (1986, fig. 52.4) as Brevicornu crassicornis.