Orthosia, Ochsenheimer, 1816

Key to the Iranian species of the genus Orthosia View in CoL based on the characters of the adults and the male genitalia ( Hreblay, 1993; Ronkay et al., 2001; Wiesmair et al., 2020)

1 Male antennae biserrate with long fasciculate cilia, female antennae filiform, carina without apical thorn, corona and pollex well developed. ....................................................................................................... gracilis View in CoL

— Male antennae bipectinate, female antennae biserrate or filiform (if male antennae biserrate and female antennae filiform then corona absent and carina bears apical thorn). ......................................................... 2

2 Carina with long apical thorn, uncus scaphoid. ........................................................................................................ 3

— Carina without apical thorn, uncus slender or broad. ................................................................................... 4

3 Pollex present, aedeagus curved, apical thorn longer. ................................................................................. incerta View in CoL

— Pollex absent, aedeagus more straight, apical thorn shorter. .............................................................. habeleri

4 Hindwing of both sexes whitish, antennae of both sexes pectinate, cucullus very short, uncus slender. ....................................................................................................................................................................... miniosa View in CoL

— Hindwings not whitish, antennae different in sexes, cucullus and uncus variable. .................................. 5

5 Orbicular and reniform stigmata large, uncus broad, deltoidal, cucullus rounded.. ........................... cerasi View in CoL

— Orbicular and reniform stigmata small, uncus thin, cucullus triangular. ................................................... 6

6 Female antennae filiform, ampulla short, vesica without cornuti field. .............................................. imitabilis View in CoL

— Female antennae finely biserrate, ampulla long, vesica with cornuti field. ................................................ 7

7 Orbicular stigma tiny, small, pollex reduced to a lobe.. ................................................................................ cruda View in CoL

— Orbicular stigma large, broad, pollex acute. ...................................................................................... sordescens View in CoL