Dashymenia Poppius 1910
Creators: name: Wolski, Andrzej
name: Yasunaga, Tomohide
Publisher: name: Zenodo
Year: 2016
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Miridae
Dashymenia

description: 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
description: Published as part of 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, pp. 176-186 in Raffles Bulletin of Zoology 64 on pages 180-182, DOI: 10.5281/zenodo.4502022