Aegidinus, Arrow, 1904

Frolov, Andrey V., Akhmetova, Lilia A. & Vaz-de-Mello, Fernando Z., 2019, Contribution to the knowledge of Aegidinus Arrow (Coleoptera: Scarabaeidae: Orphninae): new species and comments on the classification and nomenclature, Journal of Natural History 53 (11), pp. 725-747 : 727-731

Key to Aegidinus species (males)

1. Parameres separated into dorsomedial and ventrolateral lobes ( Figures 1 (h,i), 2(e,f) and 3(b – d))....................................................................................................................................................... 2

- Parameres not separated into dorsomedial and ventrolateral lobes ( Figure 6 (c – e))... ................................................................................................................................ Aegidinus cornutus

2. Phallobase with ventroapical plate ( Figures 1 (g), 3(c) and 4(d)) ......................................... 3

- Phallobase without ventroapical plate ( Figures 2 (d), 4(h) and 5(d)).............................. 6

3. Parameres symmetrical .......................................................................................................................... 4

- Parameres asymmetrical .................................................................................................................... 5

4. Ventrolateral lobe of paramere with subapical tooth ( Colby 2009, fig. 55)........................ ............................................................................................................................... Aegidinus howdenorum

- Ventrolateral lobe of paramere without subapical tooth ( Figure 1 (h)).............................. ............................................................................................................................ Aegidinus guianensis

5. Parameres longer, more asymmetrical ( Figure 4 (b,c)); ventroapical plate of phallobase longer than wide ( Figure 4 (d)); protibia without medioapical tooth.......................................... .......................................................................................................................... Aegidinus noriegai sp. nov.

- Parameres shorter, less asymmetrical ( Figure 3 (b,d)); ventroapical plate of phallobase wider than long ( Figure 3 (c)); protibia with medioapical tooth Aegidinus candezei

6. Mediobasal margins of dorsomedial lobes of parameres feebly sclerotised, membranous ( Figure 2 (e)); protibia with medioapical tooth...................................................................... 7

- Mediobasal margins of dorsomedial lobes of parameres strongly sclerotised (4G, 5E); protibia without medioapical tooth ............................................................................................. 9

7. Ventrolateral lobes of parameres long and slender (in lateral view), noticeably longer than dorsomedial lobes ( Figure 2 (f)).......................................... .......................................... steinheili

- Ventrolateral lobes of parameres triangular and obtuse in lateral view, not longer than dorsomedial lobes ..................................................................................................................... 8

8. Ventrolateral lobes of parameres as long as dorsomedial lobes...... Aegidinus petrovi

- Ventrolateral lobes of parameres noticeably shorter than dorsomedial lobes............... ............................................................................................................... Aegidinus teamscaraborum 9. Dorsal sides of parameres strongly overlapping and separated by slit ( Figure 4 (f), arrowed).......................................................... .......................................................... Aegidinus simulatus - Dorsal sides of parameres less overlapping and not separated by slit ( Figure 5 (f)) 10

10. Dorsal processes of parameres carina shaped ( Figure 5 (e), arrowed)................................. ........................................................................................................................... Aegidinus colbyae sp. nov.

- Dorsal processes of parameres tooth or spur shaped........................................................ 11

11. Dorsal processes of parameres long, spur shaped........... ........... Aegidinus brasiliensis

- Dorsal processes of parameres short, tooth shaped............ ............ Aegidinus howeae

Figures

Figure 1. Aegidinus guianensis, holotype, female (a, b, d), female, paratype of Ae. oreibates (c), female from Villa Napoleão, Brazil (e), male, holotype of Ae. oreibates (f), male, paratype of Ae. oreibates (g–i). Habitus in dorsal view (a, c, f), labels (b), female external genitalia (d, e), aedeagus in lateral (h) and ventral view (g), parameres in dorsal view (i).

Figure 2. Aegidinus steinheili, lectotype, male (a, d–f), male with erroneous label ‘Bresil Steinheil...’. (b), female, paralectotype (c, g). Habitus in dorsal view (a–c), female external genitalia (g), aedeagus in lateral (f) and ventral view (d), parameres in dorsal view (e).

Figure 3. Aegidinus spp. Aegidinus candezei, lectotype, male (a, e), male (b–d), female (h, k), female, holotype of Ae. sunidigea (g, j); Aegidinus sp., paralectotype of Ae. candezei (f, i, l). Habitus in dorsal view (a, g, h, i); labels (e, f); female external genitalia (j–l); aedeagus in lateral (b) and ventral view (c); parameres in dorsal view (d).

Figure 4. Aegidinus spp. Ae. noriegai sp. nov., holotype (a–d), Ae. simulatus, male (e–h). Habitus in dorsal view (a, e); aedeagus in lateral (b, f) and ventral view (d, h); parameres in dorsal view (c, g).

Figure 5. Aegidinus colbyae, holotype male (a, e, d, f), paratype female (b, c). Habitus in dorsal view (a, b); female external genitalia (c); aedeagus in lateral (f) and ventral view (d); parameres in dorsal view (e).

Figure 6. Aegidinus cornutus, male (a, c, d, e), female (b, f). Habitus in dorsal view (a, b); female external genitalia (f); aedeagus in lateral (c) and ventral view (e); parameres in dorsal view (d).