Devernodes, Grebennikov, 2018

Grebennikov, Vasily V., 2018, Discovery of Lymantini weevils (Coleoptera: Curculionidae: Molytinae) outside the Americas: Devernodes, a new genus for five new species from Southeast Asia, Zootaxa 4500 (3), pp. 363-380 : 372

Key to Devernodes adult beetles

1 Each elytron with seven striae ( Figs 8G,H.J ); body form more elongate in dorsal view, ratio of length to maximal width 2.1–2.5 ( Figs. 1A , 2A , 4A ).................................................................................... 2

1* Each elytron with nine striae ( Figs 8I,K,L ); body form more rounded in dorsal view, ratio of length to maximal width 1.9–2.2 ( Figs 3A , 5A , 6A )..................................................................................... 3

2 Eyes larger, each with at least 15 ommatidia, eyes oval in shape, their posterior edge rounded ( Fig. 7G ) or straight ( Fig. 7H ); rostrum dorsally with central longitudinal groove ( Figs 7A,B ).................... D. alkippe sp. n. (Mount Emei, China)

2* Eyes smaller, each with less than 10 ommatidia, eyes crescentic in shape, their posterior edge concave ( Fig 7J ); rostrum dorsally with two central longitudinal lines of punctures ( Fig. 7D )....... D. chthonia sp. n. (the Tam Dao Mountains, Vietnam)

3 Pronotum with central longitudinal groove containing two lines of punctures ( Figs 3A,D ); each eye with less than 15 ommatidia ( Fig. 7I )................................................ D. asteria sp. n. (the Tam Dao Mountains, Vietnam)

3* Pronotum without central longitudinal groove; each eye with at least 15 ommatidia................................. 4

4 Each eye with at least 25 ommatidia ( Fig. 7K ); outermost elytral stria bent upwards ( Fig. 8 )........................................................................................ D. drimo sp. n. (Pasoh Forest Reserve, Malaysia)

4* Each eye with less than 20 ommatidia ( Fig. 7L ); outermost elytral stria parallel to lateral elytral margin ( Fig. 8 )............................................................................... D. methone sp. n. (Tanah Rata, Malaysia)

Figures

FIGURE 1. Devernodes alkippe sp. nov., holotype. A–D: habitus, dorsal (A), lateral (B), ventral (C), fronto-lateral (D); E–G: aedeagus, lateral (E), dorsal (F), ventral (G).

FIGURE 2. Devernodes alkippe sp. n., paratype 2345. A–D: habitus, dorsal (A), lateral (B), ventral (C), fronto-lateral (D); E– G: aedeagus, lateral (E), dorsal (F), ventral (G).

FIGURE 3. Devernodes asteria sp. n., holotype. A–D: habitus, dorsal (A), lateral (B), ventral (C), fronto-lateral (D); E–G: aedeagus, lateral (E), dorsal (F), ventral (G).

FIGURE 4. Devernodes chthonia sp. n., holotype. A–D: habitus, dorsal (A), lateral (B), ventral (C), fronto-lateral (D); E–G: aedeagus, lateral (E), dorsal (F), ventral (G).

FIGURE 5. Devernodes drimo sp. n., holotype. A–D: habitus, dorsal (A), lateral (B), ventral (C), fronto-lateral (D).

FIGURE 6. Devernodes methone sp. n., holotype. A–D: habitus, dorsal (A), lateral (B), ventral (C), fronto-lateral (D); E–G: aedeagus, lateral (E), dorsal (F), ventral (G).

FIGURE 7. Devernodes, clades A–F, heads dorsal (A–F) and lateral (G–L), holotypes (A, C–F) and paratype 2345 (B). A,B,G,H: D. alkippe sp. n., C, I: D. asteria sp. n., D, J: D. chthonia sp. n., E, K: D. drimo sp. n., F, L: D. methone sp. n.

FIGURE 8. Devernodes, clades A–F, right antennae (A–F) and declivity of left elytron (G–L), holotypes (A, C–F) and paratype 2345 (B). A,B,G,H: D. alkippe sp. n., C, I: D. asteria sp. n., D, J: D. chthonia sp. n., E, K: D. drimo sp. n., F, L: D. methone sp. n. Numbering of elytral striae does not necessarily imply homology.