Deltocephalini, Dallas, 1870

Webb, Michael D. & Viraktamath, Chandra A., 2009, 2163, Zootaxa 2163, pp. 1-64 : 10

Key to Old World Deltocephalini genera (males)

Note: The Australian genera Loralia Evans , Pingellus Evans and Occiplanocephalus Evans are omitted from the tribe (see introduction).

1 Subgenital plates fused basally ( Fig. 49e) .................................................................................................................... 2

- Subgenital plates separated........................................................................................................................................... 4

2 Aedeagal shaft with a pair of lateral processes............................................................................................................. 3

- Aedeagal shaft without a pair of lateral processes. ......................................................................................... Yuanamia

3 Style subapical lobe absent ( Fig. 49f); anal tube well developed and exposed ...................................... Miradeltaphus

- Style subapical lobe present ( Fig. 51f); anal tube poorly developed and not exposed ................................. Peitouellus

4 Posterior margin of pygofer comb-like ( Fig. 3o) ........................................................................................... Ctenurella

- Posterior margin of pygofer not comb-like................................................................................................................... 5

5 Pygofer with processes ( Fig. 52 p,q) ........................................................................................................ Paramesodes

- Pygofer without processes ............................................................................................................................................ 6

6 Aedeagal shaft very elongate, more than 1½ times length of connective ( Figs 47i, 48i)...........................................7

- Aedeagal shaft short to moderately long, less than 1½ times length of connective ..................................................... 8

7 Subgenital plate and pygofer very long ..................................................................................................... Wyushinamia

- Subgenital plate and pygofer not elongated .................................................................................................... Polyamia

8 Aedeagal shaft with laterobasal processes (see Fletcher, 2004, figs 11–24) ..................................................... Horouta

- Aedeagal shaft without laterobasal processes............................................................................................................... 9

9 Aedeagal shaft with a pair of lateral subapical processes, equal in length to adjacent shaft apex ( Figs 1j, k) ............. ........................................................................................................................................................................ Alobaldia

- Aedeagal shaft without lateral subapical processes or if present then shorter than length of adjacent aedeagal shaft apex ............................................................................................................................................................................. 10

10 Subgenital plate with macrosetae arising centrally ( Fig. 46e); aedeagal shaft strongly laterally compressed over distal two-thirds ( Fig. 46i) ......................................................................................................................... Matsumuratettix

- Subgenital plate with macrosetae arising laterally ( Fig. 2e); aedeagal shaft slightly laterally compressed (figs 4h, i) to dorsoventrally compressed ( Figs 2h, j)................................................................................................................... 11

11 Style apical process modified with apical process rounded apically (see Fletcher, 2006, figs 9, 14, 19); connective stem very short (see Fletcher, 2006, figs 10, 15, 20). Australia.............................................................. Warlucephalus

- Style apical process tapered to apex ( Fig. 1f); connective stem short to long ( Figs 1j, 2j) ......................................12

12 Aedeagal shaft and connective short and robust, shaft compressed dorsoventrally with an apical notch ( Figs 2h, j)... ............................................................................................................................................................................. Endria

- Aedeagal shaft short to elongate, slightly laterally compressed ( Figs 4h, i) to dorsoventrally compressed ( Figs 13h, j); connective elongate ................................................................................................................................................ 13

13 Aedeagal shaft with a ventroapical shelf-like process ( Fig. 8h)....................................................................... Heidinus

- Aedeagal shaft with ventroapical process absent or, if present, not shelflike ( Deltocephalus group)... .................... 14

14 Aedeagal shaft short and robust, upturned distally with an apical gonopore ( Figs 4h, 5h, 6h).................................. 15

- Aedeagal shaft elongate, weakly curved dorsally with gonopore indistinct ( Fig. 11h) .................................... Maiestas

15 Aedeagal shaft with a ventroapical process ( Fig. 4h) .......................................................................................... Recilia

- Aedeagal shaft without an apical process ( Fig. 6h) ................................................................................. Deltocephalus