Dashymenia Poppius, 1910

Wolski, Andrzej & Yasunaga, Tomohide, 2016, Taxonomic review of the fungal-inhabiting plant bug genera Bothriomiris and Dashymenia (Hemiptera: Heteroptera: Miridae: Cylapinae: Bothriomirini), with descriptions of two new species of Dashymenia from Thailand, Raffles Bulletin of Zoology 64, pp. 176-186 : 180-182

Dashymenia Poppius, 1910

( Figs. 1–6 , 11, 12 )

Dashymenia Poppius, 1910: 170 (gen. nov.), type species: Dashymenia convexicollis Poppius, 1910 (original designation); Carvalho, 1955: 17 (key to genera), 1957: 27 (catalog); Schuh, 1995: 24 (catalog); Gorczyca, 2000: 47 (list), 2006: 11 (catalog).

Dasymenia: Bergroth, 1920: 69 (unnecessary emendation).

Diagnosis. Body elongate oval to suboval ( Yasunaga & Miyamoto, 2006: figs. 1A, B, 2D), usually larger than 4.5 mm; dorsum shining, covered with long, dense vestiture ( Wolski & Gorczyca, 2012: 5–12, 50, 51, 55, 64, 66, 67); head moderately rugose ( Wolski & Gorczyca, 2012: figs. 44, 45); antennal segment I cylindrical along entire length, weakly narrowed basally ( Wolski & Gorczyca, 2012: figs. 55, 64, 74); segment II stout (Wolski & Gorczyca, 2014: figs. 5–12), covered with dense vestiture ( Wolski & Gorczyca, 2012: figs. 74–75); apex of labium reaching beyond apex of procoxae ( Figs. 2, 4, 6 ; Wolski & Gorczyca, 2014: fig. 51); pronotal calli flattened, weakly defined, sometimes not differing externally from surrounding areas ( Figs. 1, 3 ; Wolski & Gorczyca, 2012: figs. 5–12); scutellum almost flattened or weakly arched, without medial swelling ( Figs. 1, 3, 5 ; Wolski & Gorczyca, 2012: figs. 5–12); metepisternum impunctate ( Figs. 2, 4, 6 ; Wolski & Gorczyca, 2012: figs. 50, 51, 69, 70); ostiolar peritreme characteristically rounded, devoid of microtrichae and shiny ( Figs. 2, 6 ; Wolski & Gorczyca, 2012: fig. 71); endosoma with DSS stout, strongly broadened basally and with fully set of sclerites ( Figs. 11, 14, 17 : Yasunaga & Miyamoto, 2006: fig. 3J; Wolski & Gorczyca, 2012: figs. 39, 57, 58, 60, 61, 80, 84).

Key to species of Dashymenia

1. Body smaller than 3.5 mm; antennal segment I short, shorter than half width of vertex, narrowed basally, strongly broadened toward apex, nearly triangular in outline; sensory lobe of left paramere with a characteristically curved process ( Gorczyca & Wolski, 2006: fig 3)........ D. kerzhneri Gorczyca & Wolski

– Body larger than 3.5 mm; antennal segment I longer than half width of vertex, usually cylindrical or slightly narrowed basally ( Figs. 2, 3, 5 ; Wolski & Gorczyca, 2012: fig. 74); sensory lobe of left paramere usually flattened or weakly convex.............2

2. Scutellum entirely dark brown to black ( Figs. 1, 3, 5 : Wolski & Gorczyca, 2012: fig. 7) .......................................................3

– Scutellum with a more or less developed, yellowish or orange tinge apically ( Wolski & Gorczyca, 2012: figs. 5, 6, 10–12). .................................................................................................8

3. Labium extending to procoxae ( Fig. 4 ); endosomal AES situated at apex of endosoma, PES characteristically bifurcated apically ( Fig. 14 ).............................. D. capillosa (Yasunaga) n. comb.

– Labium extending to mesocoxae ( Figs. 2, 6 ); endosoma with AES and PES of different shape ( Figs. 11, 17 ; Yasunaga & Miyamoto, 2006: 3 J) ...............................................................4

4. Antennal segment II fuscous or yellow with a brown annulation basally (Poppius, 1914; Yasunaga & Miyamoto, 2006: fig. 2D); endosoma as depicted by Yasunaga & Miyamoto (2006: fig. 3J) (unknown in D. macgillavryi) ..........................................5

– Antennal segment II with numerous, sometimes indistinct brown spots ( Wolski & Gorczyca, 2012: fig. 7); endosomal segment PES crescent–like, curved and pointed apically ( Figs. 11, 17 ; Wolski & Gorczyca, 2012: fig. 39) ........................................6

5. Antennal segment II yellow with a brown annulation basally; antennal segment IV yellow with brownish black annulations basally and apically........................... D. macgillavryi Poppius

– Antennal segments II and IV fuscous ............... D. yakushima (Yasunaga & Miyamoto) n. comb.

6. Antennal segment II contrastingly yellow with distinct brown spots ( Wolski & Gorczyca, 2012: fig. 7); endosoma with DSS short, not reaching middle of endosoma; AES nearly parallelsided ( Wolski & Gorczyca, 2012: fig. 39)......... D. conspersa Wolski & Gorczyca

– Antennal segment II brown to dark brown with indistinct brown spots ( Fig. 5 ); endosoma with DSS reaching apex of endosoma; AES narrowed on basal one third and strongly broadened, somewhat rounded apical two thirds ( Figs. 11, 17 )...............7

7. Endosoma with MES indistinct, occupying apical half of endosoma; left lateral margin of PES with a sharp process subapically .... D. gorczycai Wolski & Yasunaga , new species

– Endosoma with MES strongly enlarged, occupying entire surface of endosoma; PES with a left lateral margin sinuate, without process subapically ( Fig. 11 ) .................................................... ............... D. artchawakomi Wolski & Yasunaga , new species

8. Pronotum orange with a broad, black patch along midline of posterior lobe and with a broad, orange transverse stripe on corium apically; scutellum entirely orange .............................. .................................................................. D. croesus (Distant)

– Pronotum dark brown to blackish, only with a yellowish or orange tinge laterally, if pronotum entirely blackish, then dorsum blackish with a contrasting orange patch on scutellum and hemelytron apically; hemelytron entirely dark brown or with a relatively narrow, orange patch on corium apically..9

9. Head entirely dark brown .......................... D. remus (Distant) – Head varying from yellow, sometimes with brownish tinges to red or brown ( Wolski & Gorczyca, 2012: figs. 5, 6, 9–12) ...............................................................................................10

10. Antennal segment I uniformly reddish or dark red ( Wolski & Gorczyca, 2012: figs. 10, 11); DSS long, straight, and sharply pointed (D. tenmalai) ( Wolski & Gorczyca, 2012: fig. 80) .... ...............................................................................................11

– Antennal segment I yellowish, with reddish rings: one situated beyond base and the other at apex ( Wolski & Gorczyca, 2012: figs. 5–6, 12), if reddish rings absent, then yellow stripes at sides of pronotum well developed ( Wolski & Gorczyca, 2012: fig. 9); DSS more or less curved, not sharply pointed (Figs. 57, 60, 84) .............................................................................12

11. Scutellum orange, with a distinct dark brown patch medially, originating from base ( Wolski & Gorczyca, 2012: figs. 10, 11)......................................... D. tenmalai Wolski & Gorczyca

– Scutellum black brown basally, yellowish red apically........... ........................................................... D. convexicollis Poppius

12. Antennal segment I entirely yellow without reddish annulations; yellow stripes at sides of pronotum well developed, occupying nearly one third of surface ( Wolski & Gorczyca, 2012: fig. 9) .............................................. D. kotejai Wolski & Gorczyca

– Antennal segment I yellowish, with reddish rings: one situated beyond base and the other at apex ( Wolski & Gorczyca, 2012: figs. 5, 6, 12); yellow stripes at sides of pronotum narrower, hardly visible in dorsal view ( Wolski & Gorczyca, 2012: figs. 5, 6, 12) .................................................................................13

13. Lateral yellow stripe on pronotum narrow, not visible in dorsal view ( Wolski & Gorczyca, 2012: fig. 12); MES and PES almost straight and relatively small ( Wolski & Gorczyca, 2012: fig. 84) ............................................. D. webbi Wolski & Gorczyca

– Lateral yellow stripe on pronotum broader, distinctly visible in dorsal view ( Wolski & Gorczyca, 2012: figs. 5, 6); MES strongly curved, sharply pointed apically; PES composed of two sclerites: one large and hook-shaped and the other strongly narrowed toward apex ( Wolski & Gorczyca, 2012: figs. 57, 60)..........................................................................................14

14. PES with smaller sclerite obtuse and large hook-shaped sclerite without swelling posteriorly ( Wolski & Gorczyca, 2012: figs. 60, 61)................................. D. colubrina Wolski & Gorczyca

– PES with smaller sclerite sharply pointed, hook-shaped sclerite with a swelling posteriorly ( Wolski & Gorczyca, 2012: figs. 57, 58).................................... D. cognata Wolski & Gorczyca

Figures

Figs. 1–6. Dorsal habitus photographs: 1, 2, Dashymenia artchawakomi (1. holotype, 2, paratype, male); 3, 4, D. capillosa (3. Female, Thai: Nk. Ratchasima: Sakaerat Environ. R.S., upper tower, coll. T. Yasunaga, 29 October 2008, 4. Female, Ryukyus: Ishigaki: Mt. Nosokodake, coll. T. Nakata, 14 August 2002); 5, 6, D. gorczycai (holotype).

Figs. 7–19. Male genitalia. 7–9, Bothriomiris ernsti; 10, B. lugubris; 11–13, Dashymenia artchawakomi; 14–16, D. capillosa; 17–19, D. gorczycai. 7, 10, 11, 14, 17, Endosoma (dorsal view); 8, 12, 15, 18, Left paramere (right lateral view); 9, 13, 16, 19, Right paramere (dorsal view). AES = anterior endosomal sclerite; APR = apical process; BPR = basal process; DSS = sclerotized portion of ductus seminis inside endosoma; MES = medial endosoma sclerite; PES = posterior endosomal sclerite; PB = paramere body.