Schizoptera (Odontorhagus)

Leon, Stephanie & Weirauch, Christiane, 2016, Scratching the surface? Taxonomic revision of the subgenus Schizoptera (Odontorhagus) reveals vast undocumented biodiversity in the largest litter bug genus Schizoptera Fieber (Hemiptera: Dipsocoromorpha), Zootaxa 4184 (2), pp. 255-284 : 259-260

Key to the species of Schizoptera (Odontorhagus)

This key includes all new species as well as those species for which re-descriptions of the genitalia were available ( S. decius , S. commodus , and S. stricklandi ), and S. trinitatis , for which the microscopic slide mount image sufficed for species-level diagnostic features of the subgenital plate.

1 Subgenital plate distinctly asymmetrical with longitudinal margin forming an angular incision with posterior margin of left lateral process ( Figs 5B, 5K ), or with a large, irregular incision ( Fig. 5J )............................................ 2

- Subgenital plate weakly asymmetrical with rounded, or almost rounded tip........................................ 9

2 Subgenital plate with two processes, a club-shaped anterior and a jagged tab-like posterior process, left inner margin of pygophore with long, curving process ( Fig. 5J ).................................................. S. enigmatica , n. sp.

- Subgenital plate with a single lateral process; left inner margin of pygophore short, without process.................... 3

3 stVII with a small process on posterior margin............................................................... 4

- stVII without small process on posterior margin............................................................. 5

4 Subgenital plate short, with left side reduced, forming an angular incision>90º, right conjunctival appendage large and serrated, body small ( Fig. 5E )................................................................... S. brevis , n. sp.

- Subgenital plate lateral process with a straight posterior margin forming a 90º angle with longitudinal margin of subgenital plate ( Fig. 5B ); right conjunctival appendage thin or robust, with or without serrations; body relatively large............. 6

5 Lateral process of subgenital plate small and balde-like, with a straight posterior margin forming a 90º angle with longitudinal margin of subgenital plate ( Fig. 5 V), general coloration dark brown, with SC+C distinctly lighter than remainder of hemelytra ( Fig. 2 , S trivialis , n. sp.).................................................................. S. trivialis , n. sp.

- Lateral process of subgenital plate formed by a slit-like lateral and triangular caudal incisions, lateral process of subgenital plate broad and lobe shaped, right paramere with a bifurcating process ( Fig. 6N ), right conjunctival appendage with trifurcating tip, vesica short, forked and serrated ( Fig. 6N )............................................. S. monstrosa , n. sp.

6 Lateral process of subgenital plate thumb-shaped, with notch on anterior margin, forming a “key and lock” appearance with process of stVI ( Figs 5K , 6N )............................................................................ 7

- Lateral process of subgenital plate blade-shaped, without a notch on anterior margin................................ 8

7 Head slightly concave in ventral view ( Fig. 3 , S. exacta , n. sp.), body coloration uniformly light brown, right paramere thin, right conjunctival appendage needle-like, vesica uniformly thin, forming at least three coils, anophore with prominent dorsal fold.................................................................................... S. exacta , n. sp.

- Head flat in ventral view ( Fig. 3 , S. insidiosa , n. sp.), body coloration dark brown, with SC+ C distinctly lighter, right paramere large, vesica uniformly thin forming at least four coils, anophore with fingerlike process on dorsal wall and a wide

dorsal aperture ( Fig. 6M )................................................................. S. insidiosa , n. sp. 8 M2 vein distinctly curving, forming a wedge-shaped anterior membranal cell ( Fig. 4 , S. trinitatis ), process of stVI small, and tooth-like.............................................................................. S. trinitatis Emlsey

- M2 vein straight ( Fig. 2 , S. angularis , n. sp.), forming a triangular anterior membranal cell, process of stVI tab-like, body small, vesica uniformly long and thin ( Fig. 5B )................................................ S. angularis , n. sp.

9. stVI with process on posterior margin.................................................................... 10

- stVI without process on posterior margin.................................................................. 13

10 Process of posterior margin of stVI triangular, and tooth-like................................................... 11

- Process of posterior margin of stVI blunt, tab-like........................................................... 12

11 Tooth-like process of stVI large, about 1/3 length of stVI with jagged edges ( Fig. 5H ), lateral process of subgenital plate toothshaped with a serrated posterior margin, subgenital plate lateral margin distinctly curving and sclerotized ( Fig. 5H ), general coloration brown, eyes large, about 1/2 width of synthlipsis....................................... S. dentata , n. sp.

- Tooth-like process of stVI small, about 1/10 length of stVI ( Fig. 5D ), lateral process of subgenital plate thumb-like, lateral margins of subgenital plate distinctly jagged, general coloration dark brown ( Fig. 2 , S. aspera , n. sp.), eyes small, about 1/3 width of synthlipsis........................................................................ S. aspera , n. sp.

12 Tab-like process of stVI large, about 1/3 length of stVI, process of subgenital plate blunt and rectangular, pointing apically ( Fig. 5G ), body coloration dark brown, with fuscous patch coving 1/2 of wing membrane ( Fig. 2 , S. decius )............................................................................................. S. decius McAtee & Malloch

- Tab-like process of stVI small, about 1/6 length of stVI, process of subgenital plate blunt, not fully differentiated from subgenital plate ( Fig. 6P ), general coloration dark brown, wing membrane without fuscous patch ( Fig. 3 , S. quasicompleta , n. sp.).................................................................................... S. quasicompleta , n. sp.

13 Process of subgenital plate uniform, without bifurcation...................................................... 14

- Process of subgenital plate bifurcating....................................................................22

14 Process of subgenital plate relatively large, well-differentiated from subgenital plate............................... 15

- Process of subgenital plate small, not well-differentiated from subgenital plate.................................... 16

15 Process of subgenital thick and straightly projecting to the left................................................. 17

- Process of subgenital plate thin and slightly projecting caudally................................................ 18

16 Subgenital plate process rounded, projecting apically........................................................ 20

- Subgenital plate process triangular, or with jagged margins.................................................... 21

17 Process of subgenital plate elongate, smooth and handle-shaped ( Fig. 5C ), vesica long and forming almost two coils, anophore forming a half-pipe, body size large (~ 1.53–1.59mm), general body coloration dark brown ( Fig. 2 , S. ansata n. sp.)............................................................................................... S. ansata , n. sp.

- Process of subgenital plate stout, with rectangular base, and modified tip......................................... 19

18 Process of subgenital plate hook-shaped, curving and projecting caudally, right paramere large, right conjunctival appendage large, curving and serrated, left conjunctival appendage prong-shaped ( Fig. 6 F), body coloration light brown ( Fig. 3 , S. commodus ).................................................................... S. commodus McAtee & Malloch

- Process of subgenital plate thin and needle-shaped, almost projecting caudaly, right conjunctival appendage flat, with serrations on ventral margin, body coloration uniformly dark brown ( Fig. 2 , S. acuta , n. sp.)................. S. acuta , n. sp.

19 Process of subgenital plate shaped like a fishtail ( Fig. 6O ), right paramere simple, without serrations, right conjunctival appendage tapering with a serrated tip ( Fig. 6O ), left conjunctival appendage with blunt and finshaped processes, body coloration light brown ( Fig. 3 , S. piscicaudata , n. sp.)........................................... .. S. piscicaudata , n. sp.

- Process of subgenital plate uniformly rectangular ( Fig. 6T ), apex of subgenital plate almost connical, right paramere with a large, serrated process, right conjunctival appeandage small, and obascured by vesica, left conjunctival appendage cashewshaped ( Fig. 6T ), body coloration dark brown ( Fig. 3 , S. singlularis , n. sp.)......................... S. singularis , n. sp.

20 Body size broadly ovoid, coloration light brown without fuscous patch on wing membrane, ( Fig. 3 , S. simpla , n.sp.), process of subgenital plate small and tab-like, left lateral margin of subgenital plate slightly curving and sclerotized ( Fig. 6S ), vesica long and thing, anophore with prominent dorsal fold.................................................. S. simpla , n. sp.

- Body ovoid, coloration light brown with prominent fuscous patch on wing membrane ( Fig. 2 , S. dolosa , n. sp.), process of subgenital plate simple and tab-like, left inner-lateral margin of pygophore distinctly sclerotized ( Fig. 5I ), vesica short, tapering and with serrations on apex, anophore with two distinct dorsal keels ( Fig. 5i )......................... S. dolosa , n. sp.

21 Process of subgenital plate short, jagged and thumb shaped ( Fig. 5 L ), left conjunctival appendage with three visible processes ( Fig. 5L ), anophore with short, blunt process on dorsal wall, body ovoid, coloration light brown, eyes large, wider than synthlipsis ( Fig. 3 , S. gorgonensis , n. sp.)....................................................... S. gorgonensis , n. sp.

- Process of subgenital plate small, almost triangular ( Fig. 6U ), anophore with a heart-shaped dorsal fold, body ovoid, coloration dark brown ( Fig. 4 , S. stricklandi )......................................................... S. stricklandi China

22 Bifurcating process of subgenital plate without serration on margins of anterior or posterior bifurcations................ 23

- Bifurcating process of subgenital plate with blade-shaped anterior and lanceolate posterior bifurcations, anterior margin of lanceolate bifurcation of subgenital plate process with distinct serrations ( Fig. 6R ), right paramere with a long, thin and serrated process, apex of right conjunctival appendage serrated, body amygdaliform, coloration dark brown ( Fig. 3 , S. serrata , n. sp.)......................................................................................... S. serrata , n. sp.

23 Bifurcating process of subgenital plate shaped like a claw, with larger anterior and shorter posterior bifurcations ( Fig. 6W ), body coloration light brown ( Fig. 3 , S. ungulata )............................................... S. ungulata , n. sp.

- Bifurcating process of subgenital plate root-shaped, with a stem and bifurcating tip, body coloration dark brown ( Fig. 2 , S. radicata , n. sp.)........................................................................... .. S. radicata , n. sp.

Figures

FIGURE 2. Habitus images of S. (Odontorhagus) species.

FIGURE 3. Habitus images of S. (Odontorhagus) species.

FIGURE 4. Images of select type specimens that were either slide mounted or damaged, with an additional S. stricklandi specimen placed next to the damaged type for comparison.

FIGURE 5 A – L. Line drawings of dorsal (above) and ventral (below) views of male genitalia, different colors correspond to different structures labeled on S. (Odonotorhagus) acuta, n. sp.

FIGURE 6 M – W. Line drawings of dorsal (above) and ventral (below) views of male genitalia, different colors correspond to different structures labeled on S. (Odonotorhagus) acuta, n. sp. (Fig. 5 A).