Strigoderma costulipennis

Delgado, Leonardo & Mora-Aguilar, Eder F., 2012, A new Mexican species and new taxonomic and distributional data of Strigoderma Burmeister (Coleoptera: Scarabaeidae: Rutelinae), Zootaxa 3597, pp. 47-52 : 50

Key to the species of Strigoderma costulipennis species group (modified from Bader 1992)

1 Pronotum coarsely punctate; elytral ridges rounded and shallow................................... S. tomentosa Bates

- Pronotum with fine and dense punctation; elytra with acute elevated ridges....................................... 2

2 Males with the inner proclaw shorter than the protarsomere 5, and with the inner ramus 0.7 of the length of outer ramus ( Fig. 4 ); male genitalia as in Figs. 5–6 ; length 5–7 mm ........................................... S. costulipennis Bates

- Males with the inner proclaw as long as the protarsomere 5, and with the inner ramus 0.3 of the length of outer ramus ( Fig. 1 ); male genitalia as in Figs. 2–3 ; length> 7 mm ................................. S. tenebrosa Delgado & Mora-Aguilar

Figures

FIGURES 1 – 9. Diagnostic structures of Strigoderma species. 1 – 3) S. tenebrosa: 1) Protarsal claws; 2) Parameres in frontal view; 3) Parameres in lateral view. 4 – 6) S. costulipennis: 4) Protarsal claws; 5) Parameres in frontal view; 6) Parameres in lateral view. 7 – 9) S. longicollis: 7) Parameres in frontal view; 8) Parameres in lateral view; 9) Tips of parameres in ventral view. Scale lines = 1 mm.