NOTONECTIDAE OCCURRING IN INDOAUSTRALIA

Nieser, Nico, 2004, Guide To Aquatic Heteroptera Of Singapore And Peninsular Malaysia Iii. Pleidae And Notonectidae, Raffles Bulletin of Zoology 52 (1), pp. 79-96 : 82-83

KEY TO SUBFAMILIES AND GENERA OF NOTONECTIDAE OCCURRING IN INDOAUSTRALIA

1. Hemielytral commissure with a definite hair-lined pit at anterior end ( Fig. 25 ) Anisopinae ....................................................... 2

– Hemielytral commissure without a definite hair-lined pit at anterior end Notonectinae ....................................................... 4

2. Coxal plates of hind legs bare ( Fig. 5 ). Male front tibia proximally with a row of stridulatory pegs usually on a stridulatory ridge ( Fig. 3 ) ..................................................... 3

– Coxal plates of hind legs covered with long black hairs ( Fig. 6 ). Males without stridular teeth or pegs on front tibiae. [ Australia and Thailand] ......................................................... Paranisops

3. Antennae three-segmented. Male rostrum with a prominent lateral prong ( Fig. 12 ), stridular teeth or pegs packed closely together proximally on a stridulatory ridge on foretibia ( Fig. 3 ) [Palaeo-tropical and -subtropical] ........................... Anisops

– Antennae two-segmented. Male rostrum without a lateral prong, stridular pegs clearly separate proximally on foretibia and not on a stridulatory ridge ( Fig. 4 ) [Australian] .......................................................................... Walambianisops

4. Anterolateral margins of prothorax foveate ( Fig. 11 ) ........... 5

– Anterolateral margins of prothorax not foveate [Cosmopolitan, predominantly temperate and subtropical zones, not recorded from the Malay Peninsula] ....................................... Notonecta

5. Mid femur with a pointed protuberance near tip ( Fig. 7 ) [Tropicopolitan] ......................................................... Enithares

– Mid femur without a pointed protuberance .......................... 6

6. Eyes posteriorly holoptic, forming an ocular commissure ( Fig. 11 ) [Palaeotropical] ....................................................... Nychia

– Eyes basally widely spaced ( Fig. 28 ) [SE Asia] ....... Aphelonecta

Figures

Figs. 25-26. Anisops breddini, male, anterior part of body in dorsal view. 25 brachypterous form; 26 macropterous form. p = ciliated pit at base of hemielytral commissure.

Figs. 5-6. Ventral view of thorax, legs distally of coxae removed. 5 Anisops, 6 Paranisops; c= coxal plate.

Figs. 3-4. Base of foretibia of male Anisopinae. 3 Anisops, 4 Walambiopsis; p = stridulatory ridge.

Figs. 12-17. Anisops male, head in lateral view. 12 A. barbatus; 13 A. bouvieri; 14 A.tahitiensis; 15 A.kuroiwae; 16 A. exiguus; 17 A. lansburyi. p = rostral prong; t = tylus.

Fig. 11. Nychia sappho, brachypterous male in dorsal view, body length 3.7 mm. c = ocular commissure; f = pronotal fovea.

Fig. 7. Middle leg of male Enithares ciliata. cl = tarsal claws; co = coxa; f = femur; p = anteapical pointed protuberance of femur; ta1, ta2, ta3 = first, second and third tarsal segment; ti = tibia; tr = trochanter.

Fig. 28. Aphelonecta gavini, male, habitus in dorsal view, length 6.7 mm.