Terellia virens (Loew, 1846)

Evstigneev, D. A. & Boyko, N. S., 2024, New data on the morphology, distribution and host plants of three species of the Terellia virens group (Diptera: Tephritidae), Zoosystematica Rossica (China) 33 (1), pp. 106-115 : 114

Key to species of Terellia virens group record- ed from Armenia and Russia

1. All elements of scutal pattern orange (ochreous). Two medial transsutural stripes separate ( Figs 3, 15). Scutum without black spots at bases of prescutellar acrostichal setae ( Figs 3, 15). Katepisternum with orange (ochre) spot. Spot on katepisternum may not be visible or have undetectable colour (a spot that barely differs from the surrounding area). Pleura above katepisternum with orange spots isolated from each other (spots not always observed)........................... T. freidbergi Larvae develop in the capitula of Centaurea spp. : C. kotschyi subsp. persica , C. ( Chartolepis ) sp., C. polypodiifolia , C. daralagoezica , C. behen , and C. spectabilis .

– Scutal pattern with black and orange (ochreous) elements. Scutum with black spots at bases of prescutellar acrostichal setae....................... 2

2. Pleura with longitudinal orange stripe running from anterior spiracle through the anepisternum to anepimeron......................... T. hajastanica Larvae develop in the capitula of C. pseudoscabiosa subsp. glehnii and pupate therein.

– Pleural stripe absent........................... 3

3. Katepisternum and meron with intense orange (ochre) spots ( Figs 24, 26)......... T. ivannikovi Larvae develop in the capitula of C. chartolepis and C. takhtajanii .

– Usually katepisternum and meron with black spots (only some specimens have orange spots)........ 4

4. Male: glans of phallus larger, possessing a long tubular extension and filaments widely separated from each other near apex ( Fig. 42)....... T. arailerica Larvae develop in the capitula of C. spectabilis and migrate into the stem for pupation.

– Male: glans of phallus smaller and different in shape. Larvae develop in the capitula and pupate therein ............................................. 5

5. Glans of phallus without a long tubular extension ( Figs 35, 40)........................ T. zerovae Larvae develop in the capitula of Centaurea iberica .

– Glans of phallus with a long tubular extension ( Figs 36, 41)....................................... 6

6. Glans of phallus with a small subapical structure ( Fig. 41) in White’s terminology (with smaller corolla-like sclerite in Korneyev’s terminology)......................................... T. virens Larvae develop in the capitula of Centaurea spp. : C. stoebe L., C. jacea L., C. trichocephala M. Bieb.

– Glans of phallus with a large preapical collar ( Fig. 36) in White’s terminology (with large corolla-like sclerite in Korneyev’s terminology)... T. uncinata Larvae develop in the capitula of C. solstitialis .