Trachusa interrupta

Kasparek, Max, 2020, Revision of the Palaearctic Trachusa interrupta species complex (Apoidea: Anthidiini) with description of four new species, Zootaxa 4728 (1), pp. 1-48 : 43-44

Key to the species of the Trachusa interrupta complex

Females

Females are in general more difficult to determine than males. The following key will allow identification of most specimens, although due to individual variation, it will not always allow identification, especially when only single specimens and no comparative material is available.

1 Tergum with red or reddish maculations, reddish transversal maculation on vertex behind ocelli; maculation in front of preoc- cipital ridge dorsally uninterrupted or interrupted in centre with contiguous ends (N Africa, Spain).............. T. varia

– Tergum with yellow maculations; maculation on vertex between eyes absent...................................... 2

2 Large yellow maculation on upper gena which extend towards middle of vertex beyond eye (N Africa).................................................................................................... T. maghrebensis sp. n.

– Maculation on gena not extending towards centre of vertex beyond eye.......................................... 3

3 Pronotal lobe dark brown or black, carina dark brown, usually low.............................................. 4

– Pronotal lobe with yellow, mostly strong carina............................................................. 7

4 Inner ends of lateral bands of T1 and T2 with sharp, slender apex; inner ends of lateral bands on T3 slender, tapering towards the centre with pointed ends; gena with yellow stripe extending to lower end of eye and not in contact with inner orbit of eye.................................................................................. T. grandicornis sp. n.

– Inner ends of lateral bands of T1 and T2 blunt; inner ends of bands on T3 with broad but sharp apex; yellow maculation on gena either confined to the upper half or broad and in contact with inner orbit of eye.................................... 5

5 Yellow maculation on gena confined to upper half (only in rare cases extending to the lower half of gena).............. 6

– Yellow maculation on gena broad and in contact with inner orbit of eye............................ T. anatolica sp. n.

6 Mid-femur with yellow stripe extending over almost the entire tibia length; inner side of hind tibia black; southern and southeastern Turkey........................................................................... T. taurica sp. n.

– Mid-femur mostly with small yellow maculation not extending beyond middle of femur; inner hind tibia without black maculation; Europe................................................................................ T. interrupta

7 Pronotal lobe yellow with central brown spot, carina strong and translucent....................................... 8

– Lateral part of pronotal lobe yellow, carina dark brown, usually low................................ T. anatolica sp. n.

8 Pronotum with obtuse projection; yellow bands on T1 interrupted with contiguous ends in centre or uninterrupted.. T. heinzi

– Obtuse projection on pronotum absent; T1 with widely separated lateral yellow bands....................... T. integra