Arthriticus, BERGROTH, 1923

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 : 83-84

publication ID	https://doi.org/ 10.1111/zoj.12311
DOI	https://doi.org/10.5281/zenodo.5452850
persistent identifier	https://treatment.plazi.org/id/142A4050-DE60-FFC8-91D1-E05BFBFCF8C0
treatment provided by	Marcus
scientific name	Arthriticus
status

Treatment

ARTHRITICUS BERGROTH View in CoL

Figures 9 View Figure 9 , 14I–L View Figure 14 , 18E, F View Figure 18 , 22 View Figure 22

Arthriticus Bergroth, 1923: 413 View in CoL (gen. nov.; type species Arthriticus eugeniae Bergroth, 1923 View in CoL by monotypy); Carvalho, 1952: 59 (cat.); Carvalho, 1955: 38 (key to gen.); Carvalho, 1957: 132 (cat.); Schuh, 1995: 509 (cat.); Schuh, 2002 –2013 (cat.).

Diagnosis: Arthriticus belongs to the Monalonion - complex (see discussion for tribe) and among the genera of this group it be recognized by: elongate body and appendages ( Fig. 9 View Figure 9 ), ASI and femora distinctly swollen apically; ASI longer than head and pronotum combined; frons not swollen on only slightly convex (as in Fig. 10J View Figure 10 ); distance between antennal fossa longer than antennal fossa width; antenna distinctly longer than body; forefemur curved; scutellum without spine-like projection; claw broadly rounded (fig. 10C in Namyatova & Cassis, 2013b); sclerotized part of phallotheca wide basally and distinctly tapering apically ( Fig. 14I View Figure 14 ); DLP with two sclerotized bands ( Fig. 18E View Figure 18 ).

Redescription: Male: Length c. 5 mm. COLORATION ( Fig. 9 View Figure 9 ). Body mostly red, with brown markings, mostly on appendages. TEXTURE. Body mostly smooth, without punctures, wrinkles and tubercles; vertex without flattened areas; semicircular depression between scutellum and mesoscutum absent; striations on scutellum laterally absent; only single depression at each side of scutellum anteriorly, present (as in fig. 9H in Namyatova & Cassis, 2013b). VESTITURE. Setae on dorsum and thoracic pleura absent; pale simple setae on clypeus, labium, appendages and abdomen present; setae on lateral margins of head, labium and abdomen mostly adpressed and short, setae on abdomen very rare, present apically only; setae on antenna mostly short, suberect or adpressed, sometimes setae on ASII longer than width of hind tibia; setae on femora present only apically, adpressed; setae on tibiae short, mostly spine-like, suberect, not very dense; apex of tibia and tarsi with adpressed short setae; black spinules on femora and tibiae absent. STRUCTURE. Head. Distance from eye and pronotum slightly shorter than eye diameter (as in Fig. 10J View Figure 10 ); occipital region not delimited by transverse depression; longitudinal depression distinct, almost as long as or longer than eye diameter; eyes not stylate, in line with contour of head, c. 0.25× as long as head width (as in Fig. 10J View Figure 10 ); distance between antennal fossa longer than antennal fossa diameter; frons slightly convex, without ridges, outgrowths or longitudinal depression; anterior view of head c. 1.3× wide as high; eye height c. 1.5× as long as distance between eye and apex of clypeus; antennal fossa oval c. 0.7× as long as eye height, not raised, inferior margin placed distinctly above inferior margin of eye; base of clypeus placed slightly below than margin of antennal fossa, basally not delimited with depression; head more or less swollen in lateral view; gula c. 2–3× as long as buccula, convex. Labium. Length slightly surpassing posterior margin of metasternum; LSI twice as long as wide; LSII c. 3× as long as wide, subequal to LSI; LSIII c. 3× as long as wide, subequal to LSII; LSIV c. 6× as long as wide, twice as long as LSIII. Antenna. About 1.8× as long as body; ASI c. 2.3× as long as head width, swollen apically; ASII c. 1.7× as long as ASI, c. 2.5× as long as head and pronotum combined; ASIII 0.8× as long as ASII; ASIV c. 0.5× as long as ASIII; ASII–IV filiform. Thorax. Collar slightly swollen (as in fig. 7A in Namyatova & Cassis, 2013b), faintly delimited posteriorly; calli separated, almost flat; depression delimiting calli posteriorly absent (as in Fig. 10J View Figure 10 ); humeral angles of pronotum rounded, not dilated; posterior margin of pronotum straight or slightly concave (as in Fig. 10J View Figure 10 ); scutellum flat, rounded apically; without outgrowth, ridge or medial depression; metepimeron narrow, c. 2.5–3× as high as long, with subrectangular outgrowth (as in Fig. 13A View Figure 13 ); metasternum rounded posteriorly, without medial projection on to abdominal segment II (as in fig. 17B in Namyatova et al., in press). Hemelytron. Costal margin concave or straight; claval commissure c. 2.3× as long as scutellum, concave (as in fig. 11G in Namyatova et al., in press); R + M distinct, reaching posterior margin of corium; medial fracture subparallel to R + M (as in fig. 11G in Namyatova et al., in press); corium without swelling posteriorly; cuneus c. 5× as long as wide, subequal to pronotum, medial margin distinctly concave (as in fig. 13C in Namyatova et al., in press); membrane cell distinctly surpassing apex of cuneus, c. 1.75× as long as pronotum, acute apically (as in fig. 14C in Namyatova et al., in press); short auxiliary vein present; distance between cell and apex of membrane c. 0.14× as long as cell. Legs. Forecoxae separated (as in fig. 17B in Namyatova et al., in press); femora distinctly swollen apically and medially, apically as wide as eye, curved; foretibia longer than head and pronotum combined; swelling on tibiae absent; segment I of hind tarsus distinctly longer than segment II, segment II and III subequal in length (as in fig. 19B in Namyatova et al., in press); claw broadly rounded (fig. 10C in Namyatova & Cassis, 2013b); basal teeth short and triangular (as in fig. 10B in Namyatova & Cassis, 2013b). Genitalia ( Fig. 14I–L View Figure 14 ). Genital capsule slightly longer than wide, with ventral wall shortened anteriorly (as in Fig. 15Q View Figure 15 ); left paramere r-shaped, twice as long as right paramere; phallobase sclerite of primary gonopore subtriangular, concave, without outgrowth(s); ductus seminis slightly longer than phallotheca, with coils, forming broad tube, without sclerotization basally or apically, attached to phallobase medially; sclerotized part of phallotheca broad basally and tapering apically; endosoma with pair of symmetrical elongate spicules.

Female: Length c. 6–7 mm. Coloration, surface, vestiture and structure as in male, but body generally larger ( Fig. 9 View Figure 9 ). Genitalia ( Fig. 18E, F View Figure 18 ). DLP membranous, with two narrow sclerotized bands, some striations present; lateral oviduct placed slightly anteriorly to midline of DLP, close to lateral margin of DLP; spermathecal gland shifter anteriorly from midpoint; posterior wall of bursa copulatrix with distinct tubercles, without outgrowths or sclerotization; base of second valvula with swelling; ventral wall with sclerites around vulva.

Distribution: Bogor ( Indonesia) ( Fig. 22 View Figure 22 ).

Host plants: Known from Eugenia sp. (Myrtaceae) ( Bergroth, 1923).