Tamalia

Kanturski, Mariusz & Wieczorek, Karina, 2015, A new species of the nearctic gall-forming genus Ta ma l i a Baker (Hemiptera: Aphididae: Tamaliinae), Zootaxa 3926 (2), pp. 268-278 : 275

Key to apterous viviparous females of the genus Tamalia

(Characters distinguishing T. coweni and T. keltoni after Richards, 1967; Miller and Sharkey, 2000; Blackman and Eastop, 2006)

1. ANT at least 5-segmented. ARS with no more than 13 accessory setae, no longer than 0.10 mm. ARS 0.93–1.21 times HT II and 0.50–0.66 times ANT III............................................................................ 2

- ANT always 5- or 6-segmented. ARS with no fewer than 18 accessory setae, no shorter than 0.15 mm. ARS 1.71–1.95 times HT II, and 1.42–2.05 times ANT III..................................................................... 4

2. ANT 5-segmented. Abdominal tergum uniformly dark sclerotic.................................. T. inquilinus Miller

- ANT 4-segmented. Abdominal tergum with transverse cross-bands.............................................. 3

3. Dorsal abdomen with cross-bands and with numerous small spicules. Head setae not more than 1.50 times BD III............................................................................................... T. coweni Cockerell

- Dorsal abdomen with sclerotized spots and without spicules. Head setae at least 2.0 times BD III........ T. keltoni Richards

4. HT I with 4 ventral setae. Dorsal spicules 0.012–0.018 mm long, with slightly rounded apices. PT/BASE (for 5-segmented individuals) 0.33–0.40....................................................... T. dicksoni Remaudière & Stroyan

- HT I with 2 ventral setae. Dorsal spicules very short, 0.002–0.005 mm long, pointed. PT/BASE 0.47–0.52. T. milleri sp. nov.