Plagiosterna

Cho, Hee-Wook & Świętojańska, Jolanta, 2017, Larval morphology of Plagiosterna adamsii (Baly) and P. aenea (Linnaeus) with resurrection of Gastrolinoides Chûjô & Kimoto and P. formosana (Bates) (Coleoptera: Chrysomelidae: Chrysomelinae), Zootaxa 4236 (2), pp. 381-391 : 389-390

Key to the mature larvae of the Palaearctic Plagiosterna

1 Abdominal segments I–V with D not developed, represented by 3 or 4 minute setae. China, Taiwan..... aeneipennis (Baly)

- Abdominal segments I–V with D well developed, sometimes unpigmented.......................................2

2 Dorsal region of abdomen with a pair of longitudinal bands on account of unsclerotized platelets and tubercles...........3

- Dorsal region of abdomen without longitudinal bands, sometimes dorsal tubercles unpigmented...................... 4

3 Dorsal region of meso- and metathorax largely unpigmented; abdomen with a pair of broad longitudinal bands, D and EP entirely unpigmented. Nepal, India.......................................................... chlorina (Maulik)

- Median line of meso- and metathorax unpigmented; abdomen with a pair of narrow longitudinal bands, D unpigmented medially, EP pigmented. Taiwan................................................................ formosana (Bates)

4 Dorsal integument covered with more dense and strongly sclerotized platelets; all tubercles always pigmented. Nepal, China, Korea.................................................................................... adamsii (Baly)

- Dorsal integument covered with less dense and weakly sclerotized platelets; pigmentation of tubercles variable, but ventral tubercles unpigmented, very rarely pigmented. Transpalaearctic.................................. aenea (Linnaeus)