Curculio, Linnaeus, 1758

Szénási, Valentin, 2022, A new species of the genus Curculio Linnaeus, 1758 (Coleoptera: Curculionidae) from Hungary and the Balkan Peninsula, Zootaxa 5162 (5), pp. 583-592 : 590-591

Key to adults of the Hungarian Curculio species

1. Elytra oblong-oval.................................................................................... 2

- Elytra short-oval, wedge-shaped......................................................................... 4

2. Rostrum of male RL/PL 1.64, of female RL/PL 3.28. Antennal segment VI of female 4.6 ×, andof male 2.5 × longer than wide, elytral striae wider and deeper. Scutellar shield not filling the whole shield pit. Sides of the penis slightly arched, penis widest at middle, apex triangular with acute point ( Figs 2g –i )......................................... elephas (Gyllenhal)

- Rostrum moderately long, or short........................................................................ 3

3. Rostrum moderately long, of male RL/PL 1.43, of female RL/PL 2.12. Antennal segment VI 2 ×longer as wide in both sexes, elytral striae narrower and shallower. Scutellar shield filling the whole shield pit. Penis evenly widening to the apical third, apex abruptly tapered to acute point ( Figs 2d–f )......................................................................................................................................... propinquus (Desbrochers des Loges)

- Rostrum short, RL/PL 1.2 in both sexes. Antennal segment VI of female 1.6 ×, and of male 1.5 × longer than wide. Scutellar shield not filling the whole shield pit. Penis evenly thick, its apex with curved sides tapering to acute point ( Figs 2a–c )............................................................................................. gyongyiae sp.n.

4. Scutellar shield longer than wide......................................................................... 5

- Scutellar shield subquadrate............................................................................. 6

5. Hind femur with acute thorn-shaped tooth, posterior margin of which is concavely indented......... venosus (Gravenhorst)

- Hind femur with broad triangular tooth, posterior margin of which is nearly straight…................. pellitus (Boheman)

6. All femora toothed.................................................................................... 7

- Profemur unarmed................................................................................... 10

7. Body and rostrum piceous-blackish....................................................................... 8

- Body and rostrum copper, brownish....................................................................... 9

8. With pale elytral spots or bands. Mesosternal intercoxal process prominently rounded?. Apex of penis triangularly pointed......................................................................................... villosus Fabricius

- Elytral vestiture entirely uniform, without pale spots or bands. Mesosternal intercoxal process flat. Apex of penis nearly spatulate................................................................................... vicetinus Cussigh

9. Antennal segments elongate, thinner, about 2.5 × longer than wide, with sparse, subrecumbent setae. Antennal club elongate, its segments apparently fused. Elytral sutural comb at the base of elytral declivity lacking or poorly developed. Penis evenly thick, apex sharply tapered to acute point................................................... glandium Marsham

- Antennal segments shorter and thicker, less than 2.5 × longer than wide, with denser and semierect setae. Antennal club oval, clearly segmented. Elytral sutural comb at the base of elytral declivity conspicuous, well developed. Penis widening evenly towards the tip, apex tapered to point.......................................................... nucum Linnaeus

10. Profemur unarmed, rarely with very small tooth. Rostrum long, of male RL/PL 1.7, of female RL/PL 1.9.. betulae (Stephens)

- All femora unarmed. Rostrum short, of male RL/PL 1.5, of female RL/PL 1.6...................... rubidus (Gyllenhal)

Figures

FIGURE 2. Male terminalia of Curculio species. Penis median lobe ventral, lateral view and median lobe tip of Curculio gyongyiae: a, b, c; C. propinquus; d, e, f; C. elephas; g, h, i. Spiculum gastrale of C. gyongyiae: j; C. propinquus: k. Scale bar: 1 mm. Not to scale: c, f, i.