Aphis

Barjadze, Shalva, 2011, A new species of Aphis Linnaeus (Hemiptera: Aphididae) from Cephalaria gigantea (Dipsacaceae) in Georgia, Zootaxa 2821, pp. 39-46 : 45

Key to species of Aphis (apterous viviparous females) from Dipsacaceae worldwide

1. Dorsum with carapace or sometimes marginal sclerites and spinopleural bars...................................... 2

-. Dorsum without extensive dorsum pigmentation............................................................. 3

2. Longest hair on ANT III 1.8–2.8x BD III; cauda with 12–20 hairs. On Cephalaria .................. A. cephalariae n. sp.

-. Longest hair on ANT III 0.3–0.7x BD III; cauda with 4–9 hairs. On Succisa ........................ A. craccivora Koch

3. Femoral hairs all much shorter than diameter of trochantro-femoral suture; cauda dusky to dark with 2–9 hairs............ 4

-. Many of femoral hairs longer of diameter of trochantrofemoral suture; cauda black with 7–24 hairs..................... 7

4. SIPH 2.0–2.8x cauda. URS 1.4–1.8x HT II. ANT VI PT 2.9–3.7x ANT VIb. On Dipsacus .............. A. ochropus Koch

-. SIPH 0.8–2.5x cauda; URS 1.1–1.5x HT II; ANT VI PT 1.3–3.3x ANT VIb...................................... 5

5. Posterior hairs on hind trochanter 0.2–0.5x diameter of trochantrofemoral suture; hairs on anterior half of subgenital plate 0.2– 0.5x III BD; on Dipsacus , Knautia and Scabiosa .............................................. A. thomasi (Börner)

-. Posterior hairs on hind trochanter 0.3–1.1x diameter of trochantrofemoral suture; hairs on anterior half of subgenital plate 1.2– 2.0x III BD.......................................................................................... 6

6. Marginal hairs on ABD TERG I 0.4–1.0x the height of the Mtu on the same tergite (see several specimens); on Knautia and Scabiosa , Succisa ....................................................................... A. confusa Walker

-. Marginal hairs on ABD TERG I 0.7–1.8x the height of the Mtu on the same tergite (see several specimens); On Cephalaria , Dipsacus , Scabiosa ...................................................................... A. gossypii Glover

7. Dorsal abdomen with dark markings...................................................................... 8

-. Dorsal abdomen without dark markings................................................................... 11

8. Dorsal abdomen without dark cross-band on ABD TERG VII; on Knautia ..................... A. longini Huculak (part)

-. Dorsal abdomen with dark cross-band on ABD TERG VII..................................................... 9

9. URS 1.30–1.50x HT II; ANT VI PT 4.4–6.0x ANT VIb; on Succisa .............................. A. succisae Holman

-. URS 0.85–1.40x HT II; ANT VI PT 1.8–4.1x ANT VIb...................................................... 10

10. SIPH 2.4–5.4x longest marginal hairs on ABD TERG I–III, 2.8–5.1x their diameter at midlength and 0.8–1.6x cauda; on Dip- sacus, Knautia , Scabiosa , Succisa ........................................................... A. fabae Scopoli

-. SIPH 5.4– 17 x longest marginal hairs on ABD TERG I–III, 3.5–7.5x their diameter at midlength and 1.3–1.9x cauda; on Dip- sacus.............................................................................. A. solanella Theobald

11. HT with a row of spine-like setae; HT I often with 3 hairs; on Dipsacus ...................... A. eugeniae van der Goot

-. HT without a row of spine-like setae; HT I with 2 or 3 hairs................................................... 12

12. ANT 0.5–0.6x BL; cauda with 7–15 hairs; ANT VI PT 1.9–2.9x ANT VIb; on Scabiosa .............. A. spiraecola Patch

-. ANT 0.60–0.75x BL; cauda with 14–24 hairs; ANT VI PT 3.0–4.0x ANT VIb; on Knautia ........ A. longini Huculak (part)