Coriophagus Kinzelbach, 1971 (Male)

Hui, Poulami, Mukherjee, Bindarika & Hazra, Niladri, 2023, Coriophagus chaudhuri sp. n. (Strepsiptera: Halictophagidae: Coriophaginae): a male strepsipteran from Jharkhand, India with a tentative phylogeny and world key to known males, Zootaxa 5346 (2), pp. 131-150 : 141-146

A world key to the species of the genus Coriophagus Kinzelbach, 1971 (Male)

1. Total length less than 2.5 mm ........................................................................... 2

- Total length greater than 2.5 mm ......................................................................... 6

2(1). Posterior margin of postlumbium straight ( Fig. 7 )...... Coriophagus monteithi Kathirithamby, 1992 (Australasia: Australia)

- Posterior margin of postlumbium sinuate................................................................... 3

3(2). Detached vein R 2 slender, longer than R 3 ( Fig. 8 )...................................................................................................... Coriophagus maai Kifune & Hirashima, 1989 (Australasia: New Guinea)

- Detached vein R 2 broad, shorter than R 3 vein............................................................... 4

4(3). Detached vein R 3 touching R 4 vein ( Fig. 4 )............................. Coriophagus chaudhuri sp. n. (Orient: India)

- Detached vein R

3 not touching R

4 vein..................................................................... 5

5(4). Detached vein R 2 ( Fig. 9 ) meets anterolateral margin of hind wing....................................................................................................... Coriophagus jennyae Kogan, 2012 (Neotropics: Brazil)

- Detached vein R 2 ( Fig. 10 ) does not meet anterolateral margin of hind wing.......................................................................................... Coriophagus casui Cowley, 1984 (Australasia: New Zealand)

6(1). Apex of maxillary palp pointed.......................................................................... 7

- Apex of maxillary palp blunt............................................................................ 8

7(6). Flabellum of antennomere III broader than rest of flabella ( Fig. 11 )................................................................................................ Coriophagus adebratti Kathirithamby, 1993 (Orient: Malaysia)

- Flabellum of antennomere III as broad as rest of flabella ( Fig. 12 )............................................................................................ Coriophagus medleri Luna de Carvalho, 1972b (Afrotopics: Nigeria)

8(6). Number of ommatidia in each eye 25 or less................................................................ 9

- Number of ommatidia in each eye greater than 25........................................................... 13

9(8). Mandibles shorter than maxillae........................................................................ 10

- Mandibles longer than maxillae......................................................................... 11

10(9). Total length less than 3.00 mm; eyes with around 15 ommatidia; R 2 vein broader than R 3 vein; length of dorsal hook of aedeagus greater than that of ventral prong ( Fig. 13 )............... Coriophagus zanzibarae ( Bohart, 1962) (Afrotropics: Tanzania)

- Total length greater than 3.00 mm; eyes with around 22 ommatidia; R 2 vein as broad as R 3 vein; length of dorsal hook of aedeagus shorter than that of ventral prong ( Fig. 14 )........... Coriophagus hansoni Cook, 2019 (Neotropics: Costa Rica)

11(9). Total length less than 3.00 mm; number of ommatidia less than 20 per eye; R 2 vein 1/3rd length of R 3; posterior margin of poslumbium sinuate ( Fig. 15 )............................. Coriophagus calcaneus Roy & Hazra, 2016 (Orient: India)

- Total length greater than 3.00 mm; number of ommatidia greater than 20 per eye; length of R 2 vein greater than 1/3rd of R 3 vein; posterior margin of postlumbium straight................................................................. 12

12(11). Eyes with around 25 ommatidia; postnotum with pointed tip ( Fig.16 ); R 2 vein half as long as R 3 ....................................................................... Coriophagus borneoensis Kathirithamby, 1993 (Orient: Malaysia)

- Eyes with around 20 ommatidia; postnotum with rounded tip ( Fig.17 ); R 2 vein 2/3rd length of R 3; tip of postnotum rounded................................. Coriophagus gressittorum Kifune & Hirashima, 1989 (Australasia: Solomon Islands)

13(8). Total length greater than 4.00 mm; prescutum straight; postnotum with rounded tip ( Fig.18 )............................................................................... Coriophagus rieki Kinzelbach, 1971 (Australasia: Australia)

- Total length less than 4.00 mm; prescutum sinuate; postnotum with pointed tip................................... 14

14(13). Eyes with around 50 ommatidia; anterior part of scutellum pointed; postlumbium moderately narrow at middle ( Fig. 19 ).............................................. Coriophagus lockerbiensis Kathirithamby, 1992 (Australasia: Australia)

- Eyes with around 40 ommatidia; anterior part of scutellum rounded; postlumbium uniformly very narrow ( Fig. 20 )................................................... Coriophagus latimanus Luna de Carvalho, 1972a (Afrotropics: Angola)

Figures

FIGURES 4A–D. Coriophagus chaudhuri sp. n. ♁ adult. A–B, Hind wing (left). C–D, Hind wing (right). (Scale bar: Figures A–D 0.5 mm).

FIGURE 7. Metathorax of Coriophagus monteithi Kathirithamby, 1992.

FIGURE 8. Body and left hind wing of Coriophagus maai Kifune & Hirashima, 1989.

FIGURE 9. Coriophagus jennyae Kogan, 2012.

FIGURE 10. Coriophagus casui Cowley, 1984.

FIGURE 11. Antenna of Coriophagus adebratti Kathirithamby, 1993.

FIGURE 12. Antenna of Coriophagus medleri Luna de Carvalho, 1972.

FIGURE 13. Coriophagus zanzibarae (Bohart, 1962): Habitus (top), aedeagus (bottom).

FIGURE 14. Coriophagus hansoni Cook, 2019: Habitus (top), aedeagus (bottom).

FIGURE 15. Coriophagus calcaneus Roy & Hazra, 2016: Hindwing (left), Metathorax (right).

FIGURE 16. Head and thorax of Coriophagus borneoensis Kathirithamby, 1993.

FIGURE 17. Coriophagus gressittorum Kifune & Hirashima, 1989.

FIGURE 18. Dorsal view of the thorax of Coriophagus rieki Kinzelbach, 1971.

FIGURE 19. Metathorax of Coriophagus lockerbiensis Kathirithamby, 1992.

FIGURE 20. Coriophagus latimanus Luna de Carvalho, 1972a.