Identification key for Caprifoliaceae- and Viburnaceae *-feeding Aphis spp. with regularly developed marginal tubercles on ABD TERG II–IV

1. URS with 4 (rarely 3 or 5) accessory setae (Fig. 8). On Valeriana ....................... Aphis dardanelliensis sp. nov.

- URS with only 2 (rarely 3) accessory setae................................................................. 2

2. ANT 5- or 6-segmented. SIPH smoky with dark apices. Cauda with 4–10 setae. On Patrinia and/or Valeriana ........... 3

- ANT 6-segmented. SIPH completely dark or dark with lighter basal part. Cauda with 8–25 setae. On other plants......... 4

3. MSL on ANT III 0.7–1.0× BD III. Cauda with 6–10 setae................................ Aphis patriniae Takahashi

- MSL on ANT III 0.3–0.5× BD III. Cauda with 4–6 setae................................. Aphis patrinicola Holman

4. SIPH L 2.06–4.5× Cauda L. Cauda short and wide with blunt apex. HTIB completely dark. On Sambucus .............. 5

- SIPH L 0.80–2.05× Cauda L. Cauda finger or tongue-shaped. HTIB with pale middle section. On other plants........... 6

5. MSL on ANT III 1.7–2.1× BD III...................................................... Aphis horii Takahashi

- Hairs on ANT III 0.5–1.7× BD III.................................................... Aphis sambuci Linnaeus

6. Abdominal dorsum with solid sclerotic shield or broad cross-bands anterior of SIPH............................... 7

- Abdominal dorsum without solid sclerotic shield or distinct broad cross-bands anterior of SIPH...................... 8

7. Posterior hair on hind trochanter 0.93–1.38× diameter of trochantro-femoral suture. On Cephalaria and Dipsacus ..................................................................................... Aphis cephalariae Barjadze

- Posterior hair on hind trochanter 1.30–1.80× diameter of trochantro-femoral suture. On Viburnum ............................................................................................... Aphis lantanae coriaria Börner

8. SIPH completely dark. MSL on ANT III 2.20–3.40× BD III. On Viburnum ...................... Aphis viburni Scopoli

- SIPH dark with lighter basal part. MSL on ANT III 0.80–2.00× BD III. On Knautia .............. Aphis longini Huculak

* The plant genera Sambucus and Viburnum, which now belong to the family Viburnaceae, were previously members of the family Caprifoliaceae.