Aphis holmani, Kanturski & Bezděk, 2019

Kanturski, Mariusz & Bezděk, Aleš, 2019, The Knautia feeding species of Aphis (Insecta: Hemiptera: Aphididae) with notes on Aphis knautiae Holman nomen nudum, Bonn zoological Bulletin 68 (2), pp. 189-203 : 202-203

Key to Knautia feeding Aphis based on Blackman & Eastop (2019)

1 ANT tubercles undeveloped or weakly developed. ABD TERG 1 and 7 with marginal tubercles (MTu) ................................................................................ 2

– ANT tubercles well developed. ABD TERG 1 and 7 without MTu........................................................... 4

2. Cauda with 14–24 hairs. Longest hairs on hind femur as long as or longer than diameter of trochantero-femoral suture. Well-developed MTu present on ABD TERG 2–4 as well as 1 and 7. ANT PT/BASE 3–4...................................................... Aphis longini

– Cauda with 4–9 hairs. Longest hairs on hind femur 0.15–0.7 of diameter of trochantero-femoral suture. Small MTu present or absent from ABD TERG 2–4(–5). ANT PT/BASE 1.5–3.3 ........................... 3

3. Posterior hair on hind trochanter 0.2–0.5 × diameter of trochantero-femoral suture. Hairs on anterior half of subgenital plate 0.2–0.5 × ANT BD III ................ ........................................................... Aphis thomasi

– Posterior hair on hind trochanter 0.6–1.1 × diameter of trochantero-femoral suture. Hairs on anterior half of subgenital plate 1.0–3.0 × ANT BD III ............. 4

4. Hairs on hind femora and antennae pointed. Hairs on anterior half of subgenital plate 2.25–2.94 × Ant BD III, R IV+V 1.40–1.52 × HT II.................................. ............................................. Aphis holmani sp. nov.

– Hairs on hind femora and antennae with blunt apices. Hairs on anterior half of subgenital plate 1.00–2.00 × Ant BD III, R IV+V 0.90–1.10 × HT II .................... ........................................................... Aphis confusa

5. Head and SIPH black. ANT III with 7–25 rhinaria. SIPH with polygonal reticulation on distal 0.1–0.2 of length (8 or more rows of closed cells) .................. 5

– Head and SIPH pale. ANT III with 0–3 rhinaria. SIPH without polygonal reticulation or with only 1–4 rows of closed cells ......................................... 6

Acknowledgements. We would like to thank the editor and two anonymous referees for valuable comments and suggestions which greatly improved the first version of the manuscript. Mariusz Kanturski gratefully acknowledges the Scholarship for Outstanding Young Scientists from the Ministry of Science and Higher Education of Poland (1165/E-340/STYP/12/17). Aleš Bezděk was partially supported by the research programm Strategy AV21 of the Czech Academy of Sciences – Diversity of Life and Health of Ecosystems”.