Ceratagallia, Kirkaldy, 1907

Pinedo-Escatel, J. A. & Dietrich, C. H., 2017, A new species of the genus Ceratagallia (Cicadellidae: Megophthalminae) from Central Mexico, Zootaxa 4347 (2), pp. 293-300 : 298-299

Key to males of Ceratagallia from Mexico

Note. C. emarginata Hamilton excluded, only female known.

1 Subgenital plates longer than wide, free at least in distal half; lateral margin of style usually with long setae........................................................................................ subgenus Ceratagallia Kirkaldy , 2

- Subgenital plates short and broad, almost entirely fused, divided only at apex; style without conspicuous setae..................................................................................... subgenus Aceratagallia Kirkaldy , 7

2 Style apex with both lateral and medial margin acutely produced................................................ 3

- Style with medial margin obtusely angulate................................................................. 4

3 Aedeagus with shaft distinctly shorter than atrium......................................... gillettei (Osborn & Ball).

- Aedeagus with shaft distinctly longer than atrium................................................ sordida ( Oman)

4 Connective longer than aedeagal shaft, aedeagal shaft shorter than atrium........................................ 5

- Connective shorter than aedeagal shaft; aedeagal shaft at least as long as atrium.................................... 6

5 Style with ventral tooth located basad of widened apex; apex twice as wide as narrowest preapical width...................................................................................................... tergata (Van Duzee)

- Style with ventral tooth located at base of widened apex, apex less than 1.5 times as wide as narrowest preapical width............................................................................................ bigeloviae (Baker)

6 Apex of aedeagus in lateral view curved, directed anteriorly.......................................... ana Hamilton

- Apex of aedeagus in lateral view straight, directed dorsocaudally................................. brailovskyi sp. nov.

7 Aedeagus with shaft short and robust, inflated near base ( Hamilton 1998: Fig. 133)............................... 18

- Aedeagus with shaft slender, not inflated near base, length variable ( Hamilton 1998: Fig. 122)........................ 8

8 Aedeagus with elongated preatrium...................................................................... 9

- Aedeagus preatrium poorly developed or absent............................................................ 10

9 Aedeagal shaft partially straight with strong curved apex....................................... uhleri (Van Duzee)

- Aedeagal shaft slightly curved without abrupt apex.............................................. oionus Hamilton

10 Posterior margin of subgenital plates as wide as anterior margin ( Hamilton 1998: Fig. 39), apex quadrate............... 16

- Posterior margin of subgenital plates distinctly narrower than anterior margin ( Hamilton 1998: Fig. 18), apex conical..... 11

11 Apophysis of style 2.0-2.2 times as long as aedeagal shaft........................................ venosa Hamilton

- Apophysis of style less than 1.5 times as long as aedeagal shaft................................................ 12

12 Forewing stramineous with brown markings............................................................... 13

- Forewing almost uniformly black............................................................. ebena Hamilton

13 Mesal margin of style straight, apex angled................................................................ 14

- Mesal margin of style convex preapically ( Hamilton 1998: Fig. 75), apex truncate................... californica (Baker)

14 Subgenital plates together longer than their maximum width............................... sanguinolenta (Provancher)

- Subgenital plates together shorter than their maximum width.................................................. 15

15 Style abruptly broadened preapically, inner apical margin rounded............................ aratra (Nielson & Maes)

- Style slightly and evenly broadened toward apex, inner apical margin acute..................... cinerea (Osborn & Ball)

16 Aedeagal shaft dorsal margin forming 90º angle with atrium, moderately straight to midlenth, thence curved dorsad............................................................................................... falcata Hamilton

- Aedeagal shaft dorsal margin forming ~45° with atrium, straight or evenly curved through most of length.............. 17

17 Style apophysis as long as base; pygofer appendage directed caudoventrally........................... nanella ( Oman)

- Style apophysis not as long as base; pygofer appendage directed ventrally..................... minuta (Nielson & Maes)

18 Aedeagus in lateral view with shaft distinctly constricted near base ( Hamilton 1998: Fig. 135)............ entoma Hamilton

- Aedeagus in lateral view with shaft evenly tapered from base to near apex ( Hamilton 1998: Fig. 133)..................................................................................................... brevis (Nielson & Maes)