Genus Trigonotylus Fieber, 1858

Trigonotylus Fieber, 1858:302; Kerzhner, 1964:959 (key); Wagner, 1974:120 (key, description); Golub, 1989:136 (revision); Schwartz, 2008:1164 (diagnosis).

Trigonotylus comprises 36 species and has a Holarctic distribution, although one species is known from the Ethiopian region (Schuh, 2002 –2013). Six species, including T. brevipes, T. coelestialium, T. pulchellus, T. ruficornis, T. subulifer, and T. tenuis were previously recorded from Iran (Reuter, 1904b; Wagner, 1958; Miyamoto, 1963; Wagner, 1968; Linnavuori, 2004; Linnavuori, 2007; Linnavuori, 2009; Hosseini, 2013); however, the presence of T. ruficornis should be confirmed.