Dedalopterus, Sabatinelli & Pontuale, 1998

Pham, Phu Van, Ahrens, Dirk & Sabatinelli, Guido, 2024, The genus Dedalopterus Sabatinelli & Pontuale, 1998 (Scarabaeidae: Melolonthinae: Leucopholini) in Laos and Vietnam, with description of a new species, Zootaxa 5406 (1), pp. 141-152 : 151

Key to the species of Dedalopterus (males only)

Based on the key of Sabatinelli & Pontuale (1998), modified and updated

1 Antennal club less than twice as long as remaining antennomeres................................................ 2

- Antennal club twice or more than twice as long as remaining antennomeres....................................... 6

2 Parameres of unequal length............................................................................ 3

- Parameres of equal length.............................................................................. 4

3 Protibia bidentate, tegument of elytra light-brown to yellow, parameres short............... D. fujianensis ( Zhang, 1990)

- Protibia tridentate (basal tooth small), tegument of elytra dark brown, parameres longer.................................................................................................... D. itohi Sabatinelli & Pontuale, 1998

4 Parameres curved ventrally by 40 o at distal third (lateral view).......................... D. fencli Zídek & Krajčík, 2007

- Parameres entirely straight (lateral view)................................................................... 5

5 Right paramere rather straight and larger.......................................... D. melanodiscus ( Zhang, 1990)

- Right paramere curved moderately dorsally at apex and slender.......................... D. hainanensis ( Zhang, 2002)

6 Pygidium apically rounded.............................................................................. 7

- Pygidium apically triangular............................................................................. 8

7 Parameres rather straight and long, right paramere width almost equal to the left one (see Fig. 3 ; Sabatinelli & Pontuale, 1998).......................................................................... D. signatus ( Moser, 1908)

- Parameres rather curved and short, right paramere narrower than left one (see Fig. 2 , Sabatinelli & Pontuale, 1998).................................................................................... D. intermedius ( Zhang, 1990)

8 Frontal depression deep; apical segment of maxillary palp with a large callus on its outer surface...................... 9

- Frontal depression superficial, apical segment of maxillary palp with a minor callus on its outer surface................................................................................................. D. malyszi Bunalski, 2001

9 Parameres unequal in length, right paramere shorter and slender than the left one............................................................................................ D. lexuanhuei Pham, Ahrens& Sabatinelli , new species

- Parameres equal in length............................................. D. pulchellus Sabatinelli & Pontuale, 1998

Figures

FIGURE 2. Habitus in dorsal view. A–B, D. lexuanhuei Pham, Ahrens and Sabatinelli, new species. A, ♂ holotype; B, ♀ paratype; C–D, D. malyszi Bunalski, 2001 (Vietnam: Sa Pa; C, ♂; D, ♀). Scale bar: 5.0 mm.

FIGURE 3. Male genitalia of Dedalopterus lexuanhuei Pham, Ahrens and Sabatinelli, new species (holotype,A–C); D. malyszi Bunalski, 2001 (D–F). A, D, parameres in left lateral view; B, E, parameres in dorsal view. C, F, parameres in right lateral view. Scale bar: 1.0 mm.