Dimia, KERZHNER, 1988

Namyatova, Anna A. & Cassis, Gerasimos, 2016, Systematic revision and phylogeny of the plant bug tribe Monaloniini (Insecta: Heteroptera: Miridae: Bryocorinae) of the world, Zoological Journal of the Linnean Society 176 (1), pp. 36-136 : 91-92

DIMIA KERZHNER

Figures 7 , 15R–U , 18P, Q , 23

Dimia Kerzhner, 1988a: 779 (gen. nov.; type species: Dimia inexpectata Kerzhner, 1988 by monotypy); Kerzhner, 1988a: 779, 792 (key for gen.); Kerzhner, 1988b: 7 (descr., disc); Schuh, 1995: 509 (cat.); Kerzhner and Josifov, 1999: 14 (cat.); Schuh, 2002 –2013 (cat.); Lin, 2006: 407 (disc.); Namyatova et al., in press (phylogeny).

Diagnosis: Dimia differs from other monaloniine genera that have a row of punctures on the clavus and R + M, in the following characters: labium slightly surpassing anterior margin of metasternum; LSI–III more than three times as long as wide; ASII twice as long as head and pronotum combined; ASIII–IV slightly clavate; three shallow ridges on frons present (as in Fig. 10M ); head flat in lateral view; anterior fossa tuberculate (as in Fig. 10L ); distance between them longer than anteri- or fossa width; metepimeron subtriangular (as in Fig. 13C ); calli separated (as in fig. 4B in Namyatova et al., in press); membrane cell distinctly elongate and acute (as in fig. 13A in Namyatova et al., in press); distance from cell to apex subequal to quarter of cell length; ductus seminis longer than phallotheca, with coils, forming wide tube ( Fig. 15R ).

Redescription: Male: Length 8–9 mm. COLORATION ( Fig. 7 ). Mainly brown or reddish brown, dorsum with dark brown markings, head, pronotum and scutellum also with whitish yellow, yellow, reddish or dark brown markings, labium and appendages mostly yellow to pale brown. TEXTURE. Body without tubercles; head without flattened areas, scutellum with wrinkles; body mostly impunctate, but pair of punctures between mesoscutum and scutellum, striations on lateral margin of scutellum and row of punctures on clavus and R + M present (as in fig. 11C, D in Namyatova et al., in press); punctures on depression delimiting calli posteriorly absent; semicircular depression between scutellum and mesoscutum absent; hemelytron smooth, without swell- ing posteriorly; femora with shallow tubercles at base of setae. VESTITURE. Body clothed with pale or dark simple setae; head, pronotum, scutellum, appendages and abdomen with long and suberect setae; hemelytron mostly with semiadpressed short setae, with protuberance posteriorly with dense setae; thoracic pleura with rarely distributed short pale adpressed setae; femora without spinules; rows of spinules on tibia present (as in fig. 18D in Namyatova et al., in press). STRUCTURE. Head. Distance between eye and pronotum distinctly shorter than eye diameter; transverse depression delimiting occipital region very shallow; longitudinal depression on vertex indistinct; eyes not stylate, in line with contour of head, c. 0.25× as wide as head; distance between antennal fossa c. 1.5× as long as antennal fossa diameter; frons distinctly swollen, with three very shallow longitudinal ridges (as in Fig. 10M ), without outgrowth or longitudinal depression; anterior view of head c. 1.7–1.8× as wide as high; eye c. 3× as high as distance between eye and apex of clypeus; antennal fossa round, diameter subequal to third part of eye height, tuberculate; inferior margin of fossa placed above inferior margin of eye; base of clypeus placed near inferior margin of antennal fossa, delimited with depression; head flat in lateral view; gula convex, c. 3× as long as buccula length. Labium. Long, slightly surpassing anterior margin of metasternum; each of LSI–II c. 4× as long as wide, subequal in length; LSIII c. 5× as long as wide, slightly longer than LSIII, LSIV c. 6–7× as long as wide, slightly longer than LSIII. Antenna. Slightly surpassing base of cuneus; ASI subequal to half of head width, widened medially (as in fig. 8D in Namyatova et al., in press); ASII c. 5× as long as ASI, twice as long as head and pronotum combined, slightly incrassate towards apex; ASIII c. 0.35× as long as ASII, slightly clavate with shallow swellings; ASIV subequal to half of ASIV, slightly clavate. Thorax. Collar distinct, fused with calli posteriorly, flat (as in fig. 4B in Namyatova et al., in press); calli separated, rounded (as in fig. 4B in Namyatova et al., in press); depression delimiting callosite region posteriorly indistinct medially; humeral angles of pronotum rounded, not dilated (as in fig. 4B in Namyatova et al., in press); posterior margin of pronotum slightly sinuate; scutellum slightly swollen, acute apically, without outgrowth or ridge, with wide medial depression; metepimeron enlarged, c. 1.5× as high as long, angulate, subtriangular (as in Fig. 13E ); metasternum with medial projection to abdominal segment II (fig. 17A in Namyatova et al., in press). Hemelytron. Costal margin straight; claval commissure twice as long as scutellum, straight (as in fig. 11C in Namyatova et al., in press); R + M distinct, reaching posterior margin of corium; medial fracture strongly inclined towards midline; corium with shallow oval swelling posteriorly; cuneus twice as long as wide, slightly longer than pronotum, medial margin almost straight; membrane cell elongate, distinctly surpassing apex of scutellum, forming acute angle (as in fig. 13A in Namyatova et al., in press), twice as long as pronotum; auxiliary vein present, short; distance from cell to apex of membrane subequal to quarter of cell length. Legs. Forecoxae contiguous (as in fig. 17A in Namyatova et al., in press); femora weakly swollen apically, straight; foretibia shorter than head and pronotum combined; swellings on tibiae absent; segment I of hind tarsus subequal in length to segments II and III each (as in fig. 19A in Namyatova et al., in press); apical half of claw curved; basal tooth on claw more than twice as long as wide, straight (as in Fig. 13J ). Genitalia ( Fig. 15R–U ). Genital capsule slightly longer than wide, without outgrowth(s), ventral wall not shortened anteriorly; left paramere distinctly r-shaped, twice as long as right paramere; phallobase sclerite of primary gonopore bowl-shaped, concave apically, without outgrowth(s); ductus seminis not sclerotized basally or apically, longer than phallotheca, with coils, forming wide tube, attached to phallobase medially; sclerotized part of phallotheca broad, occupying entire dorsal side, slightly tapering towards apex, rounded apically, without outgrowth(s) or ridge; endosoma with two large partly sclerotized areas and area of small spicules basally.

Female: Length 9–10 mm. Coloration, surface, vestiture and structure as in male ( Fig. 7 ). Genitalia ( Fig. 18P, Q ). DLP without sclerotization, with distinct striations; lateral oviducts widely separated, placed near lateral margins and slightly below midline of DLP; spermathecal gland placed slightly below midpoint; posterior wall of bursa copulatrix with tubercles very indistinct, without sclerites or outgrowths; base of second valvula slightly concave; ventral wall of bursa copulatrix membranous.

Distribution: Restricted to Russian Far East, China, Taiwan ( Fig. 23 ).

Host plants: Dimia inexpectata was recorded from Quercus dentata Thunb. (Fagaceae) ( Kerzhner, 1988b).

Figures

Figure 7. Habitus photographs. Lycidocoris mimeticus ♂ AMNH_PBI 5076, ♀ AMNH_PBI 5085; Lycidocoris thoracicus ♂ AMNH_PBI 5105, ♀ AMNH_PBI 5044; Poppiusia leroyi ♂ AMNH_PBI 19314, ♀ AMNH_PBI 5048; Pachypletis reuteri ♂ AMNH_PBI 5224, ♀ AMNH_PBI 271339; Pachypeltis chinensis ♂ AMNH_PBI 19285, ♀ AMNH_PBI 19304; Dimia inexpectata ♂ PT AMNH_PBI 271336, ♀ PT 19313; Parapachypeltis punctatus ♀ PT AMNH_PBI 19331; Pararculanus madagascariensis ♂ HT AMNH_PBI 271337, ♀ AMNH_PBI 271333; Pararculanus piperis ♂ AMNH_PBI 5060, ♀ AMNH_PBI 5062; Villiersicoris sessensis ♂ no USI label (BMNH), ♀ type AMNH_PBI 19435.

Figure 10. Scanning electron micrographs. Head and pronotum, dorsal view. A, Mansoniella nitida ♀ AMNH_PBI 46067; B, Poppiusia leroyi ♀ AMNH_PBI 5838; C, Chamus bellus ♀ AMNH_PBI 5223; D, Lycidocoris mimeticus ♀ AMNH_PBI 5043; E, Physophoropterella bondroiti ♂ AMNH_PBI 19110; G, Odoniellia reuteri ♂ AMNH_PBI 19090; H, Volkelius carvalhoi ♀ PT AMNH_PBI 19630; I, Yangambia vesiculata ♀ AMNH_PBI 19084; J, Ragwelellus suspectus ♂ AMNH_PBI 19629. Head, dorsal view. F, Sahlbergella tai ♀ AMNH_PBI 5106. Head, anterior view. K, Parachamus bellus ♀ AMNH_ PBI 5837. Head, lateral view. L, Poppiusia leroyi ♀ AMNH_PBI 5838. Frons, dorsal view. M, Poppiusia leroyi ♀ AMNH_PBI 5838.

Figure 13. Scanning electron micrographs. Metepimeron. A, Helopletis pellucida sex unknown AMNH_PBI 19628; B, Afropeltis hyalospilosus ♂ AMNH_PBI 5137; C, Poppiusia leroyi ♀ AMNH_PBI 5838; D, Pachypeltis reuteri ♂ AMNH_PBI 45980; E, Odoniella reuteri ♂ AMNH_PBI 19194. Setae on hemelytron. F, Boxia khayae ♂ AMNH_PBI 5065. Fore- and middle femora. G, Physophoropterella bondroiti ♂ AMNH_PBI 19110. Hind femur. H, Helopeltis pellucida sex unknown AMNH_PBI 19628. Hind tarsus. I, Physophoropterella bondroiti ♂ AMNH_PBI 19110. Claw, lateral view. J, Chamus sp. sex unknown, not databased; K, Pachypeltis brevirostris sp. nov. sex unknown, not databased; L, Helopeltis bradyi sex unknown, not databased.

Figure 15. Male genitalia. Dorsal view. Bryocoropsis laticollis var. infuscata. AMNH_PBI 18942. A, aedeagus; B, right paramere; C, left paramere. AMNH_PBI 5108. D, genital capsule. Bryocoropsis soror AMNH_PBI 19072. E, aedeagus; F, right paramere; G, left paramere; H, genital capsule. Eupachypeltis flavicornis LT AMNH_PBI 19128. I, aedeagus; J, right paramere; K, left paramere; L, genital capsule. Helopeltis clavifer AMNH_PBI 34191. M, aedeagus; N, right parameres; O, left paramere; P, genital capsule. Dimia inexpectata PT AMNH_PBI 271336. R, aedeagus; S, right paramere; T, left paramere; U, genital capsule. Lycidocoris mimericus AMNH_PBI 5066. V, aedeagus; W, right paramere; X, left paramere; Y, genital capsule. Lycidocoris thoracicus no USI. Z, aedeagus; AA, right paramere; AB, left paramere; AC, genital capsule. Lateral view. Helopeltis clavifer AMNH_PBI 34191. Q, genital capsule. The smaller scale is for genital capsule, the larger scale is for aedeagi and parameres.

Figure 18. Female genitalia, bursa copulatrix. Afropeltis lalandei AMNH_PBI 5261. A, dorsal labiate plate; B, posteri- or wall. Arculanus marshalli AMNH_PBI 19290. C, dorsal labiate; D, posterior wall. Arthriticus eugeniae no USI. E, dorsal labiate plate; F, posterior wall. Bryocoropsis laticollis var. infuscate AMNH_PBI 29096. G, dorsal labiate plate; H, posterior wall. Bryocoropsis soror AMNH_PBI 5144. I, dorsal labiate plate; J, posterior wall. Chamus bellus AMNH_PBI 19290. K, dorsal labiate plate. Chamus conradti AMNH_PBI 19046. L, dorsal labiate plate; M, posterior wall. Chamus overlaeti AMNH_PBI 19073. N, dorsal labiate plate; O, posterior wall. Dimia inexpectata AMNH_PBI 271341. P, dorsal labiate plate; Q, posterior wall. Distantiella theobromae. R, dorsal labiate plate; S, posterior wall.

Figure 23. Distribution maps of Bryocoropsis, Dimia, Distantiella, Lycidocoris, Pachypeltis, Parapachypeltis, Platyngomiris, Rayieria, Schuhirandella, Villiersicoris and Volkeliopsis.