Schizopteridae

Weirauch, Christiane, Whorrall, Kyle, Knyshov, Alexander & Hoey-Chamberlain, Rochelle, 2018, Giant among dwarfs: Meganannus lewisi, gen. n. and sp. n., a new genus and species of minute litter bugs from Costa Rica (Hemiptera: Schizopteridae), Zootaxa 4370 (2), pp. 156-170: 158-159

publication ID

https://doi.org/10.11646/zootaxa.4370.2.4

publication LSID

lsid:zoobank.org:pub:38F5AF0E-915D-41C0-BAC7-A8D2711BA4FD

persistent identifier

http://treatment.plazi.org/id/2F4587F0-0943-A340-F6CE-F566FA06FE4B

treatment provided by

Plazi

scientific name

Schizopteridae
status

 

Key to New World Schizopteridae 

1 Forewing with four closed submarginal cells ( Fig. 1AView FIGURE 1, black arrows); eyes relatively large, head wider than prothorax ( Fig. 1AView FIGURE 1); labium four-segmented; male sternum VIII well-developed; ovipositor well-developed............................. Hypselosomatinae  ( Williamsocoris Carpintero and Dellapé  , Glyptocombus Heidemann, Ommatides Uhler  , Hypselosomops Hoey-Chamberlain and Weirauch  , Hypsohapsis Hoey-Chamberlain and Weirauch  )

- Forewing with less than four closed submarginal cells ( Fig. 1BView FIGURE 1, black arrows); eyes smaller, head not noticeably wider than prothorax ( Fig. 1BView FIGURE 1); labium three- or four-segmented; male sternum VIII reduced, fused with pygophore; ovipositor welldeveloped or obsolete................................................................................. 2

2 Labium four-segmented ( Fig. 1CView FIGURE 1)........................................................................ 3

- Labium three-segmented ( Fig. 1DView FIGURE 1)...................................................................... 6

3 The basal half of the forewing with a deep costal fracture ( Fig. 1EView FIGURE 1, black arrow)............................................................................................ Guapinannus Wygodzinsky and Tropistotrochus Reuter 

- The basal half of the forewing without a deep costal fracture ( Fig. 1B, F, KView FIGURE 1)...................................... 4

4 Eyes large, about 2/3 as wide as synthlipsis; basal cell of the forewing much smaller than trapezoidal cell, or if larger then only three veins excluding claval veins emanate from trapezoidal cell; veins are often traced by areoles ( Fig. 1FView FIGURE 1); tarsal formula 2- 2-3 in both sexes.............................................................. Peloridinannus Wygodzinsky 

- Eyes small, about 1/3 or less as wide as synthlipsis; basal cell of the forewing larger or equal to trapezoidal cell; four to five veins excluding claval veins emanate from trapezoidal cell; veins are not traced by areoles; tarsal formula different...... 5

5 Labium straight and long, extending beyond hind coxa ( Fig. 1GView FIGURE 1, black arrow); tarsal formula 3-3- 2 in males, 2-2- 2 in females; body size <1.3 mm; ovipositor vestigial............................................... Chinannus Wygodzinsky

- Labium short, not surpassing middle coxa ( Fig. 2FView FIGURE2); tarsal formula 3-3- 3 in males, 2- 2-3 in females; total size> 2 mm; ovipositor well-developed ( Fig. 9BView FIGURE 9)........................................................... Meganannus  , n. gen.

6 Labium truncated ( Fig. 1DView FIGURE 1, white arrow); pronotal collar absent ( Fig. 1IView FIGURE 1, white arrow)..................................... Corixidea  genus group ( Corixidea Reuter, Hoplonannus McAtee and Malloch, Membracioides McAtee and Malloch, Oncerodes Uhler  , Voccoroda Wygodzinsky  , Voragocoris Weirauch  )

- Labium tapering ( Fig. 1CView FIGURE 1, white arrow; 1G, black arrow); pronotal collar usually present ( Fig. 1KView FIGURE 1, grey arrow).......... 7

7 Cu-vein on male forewing thickened and darkened (see Fig. 44 in Wygodzinsky 1948); macropterous, 1AN vein on forewing merges with Cu distally; right side of the male sternum IV with a hook..................... Itagunannus Wygodzinsky

- Cu-vein on male forewing not thickened and darkened; in macropterous specimens 1AN disappearing before reaching any other vein or forewing margin ( Fig. 1BView FIGURE 1, white arrow); right side of male sternum IV without a hook................... 8

8 Posterolateral spine on metepisternum well developed ( Fig. 1HView FIGURE 1, white arrow); radial (= posterior costal) cell pentagonal or quadrate ( Fig. 1BView FIGURE 1, grey arrow), considerably smaller than anterior costal cell, distal R-vein straight......................

. the Schizoptera  genus group ( Ceratocomboides McAtee and Malloch, Ptenidiophyes Reuter  , Schizoptera Fieber, Orthorhagus McAtee and Malloch, Kophaegis McAtee and Malloch  ) - Posterolateral spine on metepisternum absent ( Fig. 1KView FIGURE 1, white arrow); radial (= posterior costal) cell elongate ( Fig. 1JView FIGURE 1, black arrow), slightly smaller than anterior costal cell, distal part of R-vein curved...................................... 9

9 Head moderately to greatly elongated ( Fig. 1KView FIGURE 1), but without frontal projection; labium very slender, curved dorsad at apex, second labial segment much longer than first and third combined ( Fig. 1KView FIGURE 1, black arrow); basal and discoidal cells separate ( Fig. 1JView FIGURE 1, grey arrows).......................................... Nannocoris Reuter and Soekhnandanius Makhan 

- Head not elongated, but with a frontal projection bearing three stout setae (see Fig. 2View FIGURE2 in: Wygodzinsky 1947); labium moderately slender, not curved dorsad at apex, second labial segment roughly as long as either first or third; basal and discoidal cells merged (see Fig. 1View FIGURE 1 in: Wygodzinsky 1947)........................................... Biturunannus Wygodzinsky