Stomaphis, Walker, 1870

Lee, Minho, Kanturski, Mariusz & Lee, Seunghwan, 2022, A new chestnut-feeding species of Stomaphis Walker (Hemiptera: Aphididae Lachninae) from Korea, Zootaxa 5183 (1), pp. 273-281 : 279-280

Key to species of Stomaphis in the Korean Peninsula (apterous viviparous female)

(Updated from Szelegiewicz 1975; Lee et al. 1994; Lee et al. 2020; Lee et al. 2021)

1. SIPH absent.................................................................................. S. asiphon

- SIPH present......................................................................................... 2

2. Abdomen with 5 median dark patches on venter............................................................. 3

- Abdomen with 6 median dark patches on venter. On trunk of Quercus sp................................. S. japonica

3. AbdT 1–7 all with large paired dark spinal patches............................................................4

- AbdT 3–6 without paired dark spinal patches............................................................... 5

4. URS 0.64–0.68 mm. PT/Ant VIb less than 0.20. Ant V/III less than 0.53. Ant IV/III less than 0.48. URS/Ant III more than 0.82. On trunk of Castanea crenata Siebold & Zucc. ............................................ .. S. blackmani sp. nov.

- URS 0.52–0.58 mm. PT/Ant VIb more than 0.20. Ant V/III more than 0.53. Ant IV/III more than 0.48. URS/Ant III less than 0.82. On trunk of Celtis sinensis Pers. .............................................................. S. yanonis

5. AbdT 1–7 all without paired spinal sclerites. On trunk of Salix babylonica L., S. pierotii Miq ................. S. sinisalicis

- At least AbdT 1–2 with paired spinal sclerites. On trunk of Juglans mandshurica Maxim. .................. S. matsumotoi