Megistophylla, Burmeister, 1855

Wang, Fa-Lei, Li, Yan-Long & Gao, Chuan-Bu, 2024, Description of two new Megistophylla Burmeister, 1855 species from China, with a redescription of M. andrewesi Moser, 1913 (Coleoptera: Scarabaeidae: Melolonthinae), Zootaxa 5403 (4), pp. 431-446 : 446

Key to the species of the genus Megistophylla from China (males only)

1 Antennal club composed of 5 antennomeres................................................................ 2

- Antennal club composed of 6–8 antennomeres.............................................................. 3

2 Elytra glabrous, parameres goose-head-like ( Gao et al. 2019: figs. 3, 38).............. M. grandicornis ( Fairmaire, 1891)

- Elytra setaceous, parameres with 8 long branches ( Gao et al. 2019: figs. 1, 34).......... M. octobracchia Gao & Li, 2019

3 Antennal club composed of 6 or 7 antennomeres............................................................ 4

- Antennal club composed of 8 antennomeres................................................................ 5

4 Antennal club composed of 6 antennomeres, antennomere 4 with a short stab...................................... 6

- Antennal club composed of 7 antennomeres, antennomere 3 with a relatively short stab, antennomere 4 shorter than the other clubs ( Fig. 5 ); scutellum glabrous, only with several sparse punctures......... M. brevivirgata Wang & Gao , new species

5 Antennomere 2 with a long stab, antennomere 3 strong, shorter than the other clubs ( Fig. 41 ); scutellum densely punctate laterally....................................................................... M. andrewesi Moser, 1913

- Punctures usually unevenly and sparsely distributed along pronotal midline ( Fig. 20 ).Antennomere 2 without a stab, antennomere 3 consists of the basal handle and extended blade ( Fig. 24 )........................ M. keithi Wang & Gao , new species

6 Upper margin of parameres gradually narrowed apically in lateral view ( Li et al. 2016: figs. 11, 12).................................................................................................. M. xitoui Li & Wang, 2016

- Punctures are typically evenly and sparsely distributed along the pronotal midline ( Li et al. 2016: fig. 4). Apical upper margin of parameres with a bulge before apex in lateral view ( Li et al. 2016: fig. 9)............. M. formosana Wang & Li, 2016

Figures

FIGURES 4–13. Holotype of Megistophylla brevivirgata Wang & Gao, new species. 4, head in dorsal view; 5, antennae in dorsal view; 6, scutellum; 7, pygidium; 8, parameres in dorsal view; 9, 11 parameres in end view; 10, parameres in ventral view; 12, parameres in right lateral view; 13, parameres in left lateral view. Scale bar: 1.0 mm.

FIGURES 41–43. Male of Megistophylla andrewesi Moser, 1913 from Yunnan. 41, habitus in dorsal view; 42, habitus in ventral view; 43, habitus in lateral view. Scale bar: 5.0 mm.

FIGURES 20–22. Holotype of Megistophylla keithi Wang & Gao, new species. 20, habitus in dorsal view; 21, habitus in ventral view; 22, habitus in lateral view. Scale bar: 5.0 mm.

FIGUES 23–30. Holotype of M. keithi Wang & Gao, new species. 23, head in dorsal view; 24, antennae; 25, scutellum; 26, pygidium; 27, parameres in dorsal view; 28, parameres in ventral view; 29, 30, male genitalia in lateral views. Scale bar: 1.0 mm.