Tachycixius

Wagner, 1939

 

1Aedeagus with one movable subapical spine on the left and one on the right side of the theca.3
 Arrangement and/or number of movable subapical spines different.2
2Aedeagus with two movable subapical spines at the right side of the theca; sometimes an additional spine is present on the left side.T. canariensis, T. lavatubus, T. crypticus, T. retrusus
 Aedeagus with three long falcate appendages arising from the middle and with a small bifid basal ventral tooth.T. perarmata
3Movable spines curved, bifurcate (at least one of them). T. viperinus, T. bidentifer, T. bifurcatus, T. chevsureticus, T. creticus, T. cypricus
 Movable spines acute with a single tip.4
4Theca with a thorny crest on ventral side.T. venustulus
 Theca without a thorny crest on ventral side, but sometimes rigid spines or a crest are present.5
5Theca with a rigid bifurcate process on ventral side.T. logvinenkovae
 Ventral part of theca different.6
6Postclypeus distinctly swollen.T. pyrenaicus, T. distinctus, T. gravesteini
 Postclypeus normal, not swollen.7
7Medial part of theca ventral with three rigid, spine-like processes.T. desertorum, T. tigrinus
 Medial part of theca ventral with one rigid, spine-like process. Sometimes additional spines at the base of the theca.T. pilosus, T. longiceps, T. ligustinus, T. remanei, T. soosi, T. arzonei