Micronecta Kirkaldy, 1897

Tinerella, Paul P., 2008, Taxonomic revision and systematics of New Guinea and Oceania pygmy water boatmen (Hemiptera: Heteroptera: Corixoidea: Micronectidae), Zootaxa 1797 (1), pp. 1-66 : 28-29

Key to the species of Micronecta Kirkaldy of New Guinea and Oceania

1. Small species, length 1.8–2.5 mm .............................................................................................................2

- Larger species, length 2.5–3.5 mm ............................................................................................................3

2(1). Length 1.8–2.3 mm; synthlipsis narrower than width of eye; pronotal markings transverse medially, always present, of variable linear shapes ( Figs. 16a–b ); hemelytra with 2–3 longitudinal stripes; left male paramere with squared apex ( Figs. 18a–d ); widespread, India, east to Oceania ................................ ................................................................................................................... M. ludibunda Breddin (pg. 29)

- Length 2.2–2.5 mm; synthlipsis slightly wider than width of eye; pronotal markings absent, with pale, narrow apical band spanning width ( Figs. 16c–d ); hemelytral markings restricted to medial portion, dark areas broad extending onto embolar area; left male paramere pointed apically, scales present on apical third ( Figs. 22c–g ); restricted to Fiji.............................................. M. jenniferae Tinerella (pg. 34)

3(1). Length 2.5–3.0 mm; ground color brown, hemelytra with three or four interrupted longitudinal stripes 4

- Length 2.9–3.5 mm; ground color entirely black and lacking hemelytral markings or dark brown, with four distinct dark longitudinal stripes........................................................................................................5

4(3). Length 2.5–2.9 mm; hemelytra with dark markings as interrupted longitudinal series forming four broken bands ( Fig. 16e–f ); left male paramere with pronounced hook-shaped apex ( Fig. 24c–d ); right paramere long, narrow ( Fig. 24c–g ); widespread, Iran to Oceania ..... M. quadristrigata Breddin (pg. 39)

- Length 2.6–3.0 mm; hemelytra with lighter markings forming three discontinuous longitudinal stripes ( Fig. 16g –h ); male left paramere with triangular apex ( Fig. 27a–c ); right male paramere broad ( Fig. 27a–c ); Papua New Guinea, northern Australia. ..................................... M. queenslandica Chen (pg. 45)

5(3). Ground color dark black; hemelytra unicolorous, entirely devoid of patterning ( Fig. 16i–j ); large ovoid species, 3.0– 3.44 mm; left male paramere ( Fig. 30b–e ); right male paramere long, parallel-sided, apex triangular ( Fig. 30b–e ); Papua New Guinea............................................. M. carbonaria Horváth (pg.49)

- Ground color brown; hemelytra with four dark longitudinal stripes ( Fig. 16k–l ); large elongate species, 2.92–3.46 mm; left male paramere ( Fig. 34c–f ); right male paramere long, tip expanded, broadly rounded ( Fig. 34c–g ); Papua New Guinea, New Britain, Solomon Islands, Australia............................... .............................................................................................................................. M. virgata Hale (pg. 53)

Figures

FIGURE 16. Dorsal habitus of Micronecta species. a–b. M. ludibunda Breddin, male and female. c–d. Micronecta jenniferae Tinerella, male and female. e–f. M. quadristrigata Breddin, male and female. g–h. M. queenslandica Chen, male and female. i–j. M. carbonaria Horvath, male and female. k–l. M. virgata Hale, male and female. Scale bars = 0.5 mm.

FIGURE 18. Micronecta ludibunda Breddin, male genitalia. a. Left paramere, lateral aspect, right paramere, dorsal aspect. b. Left paramere, dorsolateral aspect, right paramere, dorsolateral aspect. c. Left paramere, tip, right paramere, tip. d. Left paramere, lateral aspect, right paramere dorsolateral aspect. e. Pars stridens processus, base of right paramere. f. Right paramere, base of shaft.

FIGURE 22. Micronecta jenniferae Tinerella, male abdominal terminalia. a. Free lobe of abdominal tergite VIII. b. Pars stridens processus cleaner ridges of abdominal segment VIII. c. Left paramere, lateral aspect. d. Left paramere, ventrolateral aspect. e. Left paramere, ventrolateral aspect, right paramere, dorsal aspect. f. Left paramere, ventral aspect, right paramere dorsolateral aspect. g. Right paramere, lateral aspect. h. Pars stridens processus, base of right paramere.

FIGURE 24. Micronecta quadristrigata Breddin, male pala and abdominal terminalia. a. Male fore leg, anterior aspect, palar claw folded in. b. Free lobe of abdominal tergite VIII. c. Left paramere, dorsolateral aspect. d. Left paramere, tip. e. Right paramere, dorsolateral aspect. f. Right paramere, dorsolateral aspect. g. Right paramere, lateral aspect. h. Pars stridens processus, base of right paramere.

FIGURE 27. Micronecta queenslandica Chen, male genitalia. a. Left paramere, lateral aspect, right paramere, dorsolateral aspect. b. Left paramere, dorsolateral aspect, right paramere, tip. c. Right paramere, lateral aspect. d. Pars stridens processus, base of right paramere.

FIGURE 30. Micronecta carbonaria Horváth, male abdominal terminalia. a. Free lobe of abdominal tergite VIII. b. Left paramere, lateral aspect. c. Left paramere, tip. d. Right paramere, lateral aspect. e. Right paramere, dorsolateral aspect. f. Pars stridens processus, base of right paramere.

FIGURE 34. Micronecta virgata Hale, male abdominal terminalia. a. Sternal process of abdominal segment VII. b. Free lobe of abdominal tergite VIII. c. Left paramere, lateral aspect, right paramere, dorsolateral aspect. d. Left paramere, dorsolateral aspect. e. Left paramere, dorsolateral aspect (cf Figs. c, d, f; base). f. Left paramere, lateroventral aspect, right paramere dorsolateral aspect. g. Right paramere, tip. h. Pars stridens processus, base of right paramere.