Cephalaria gigantea

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 aphids (apterous viviparous females) from Cephalaria gigantea worldwide

1. ANT tubercles well developed; URS with 6–9 accessory hairs; SIPH with a subapical zone of polygonal reticulation; ANT III with sec. rhin................................................................. Macrosiphum rosae (Linnaeus)

-. ANT tubercles little developed; URS with 2–6 accessory hairs; SIPH without a subapical zone of polygonal reticulation; ANT III without sec. rhin.................................................................................... 2

2. Spinal tubercles absent; longest hairs on ANT III 52 –75 microns; longest hairs on ANT III 1.8–2.8x BD III; SIPH 1.42–2.05x cauda; cauda with 12–20 hairs........................................................ Aphis cephalariae sp.n.

-. Spinal tubercles present on head, prothorax, ABD TERG I, VII, VIII; longest hairs on ANT III 13.–36 microns; longest hairs on ANT III 0.4–1.4x BD III; SIPH ca. 2x cauda; cauda with 4–6 hairs............. Dysaphis cephalarioides Shaposhnikov