Dasysapyga picta van Loon, 2024

Dasysapyga picta van Loon , sp. nov.

( Figs 1–4 View FIGURE 1 View FIGURE 2 View FIGURE 3 View FIGURE 4 )

Type material. Holotype, ♀, “ MALAYSIA: SE SABAH / nr Danum Valley Field C. / W0, Malaise trap 5, c 150 m / 12.vii–2.viii.1987, RMNH’86 / C. v. Achterberg & D. Kenedy ” [ RMNH].

Diagnosis. Clypeus along midline with a sharp, arching longitudinal carina, not reaching apex of clypeus ( Fig. 2B View FIGURE 2 ). OPL more than 3.0 × AOD ( Fig. 3A View FIGURE 3 ). First recurrent vein received subbasally by second submarginal cell ( Fig. 4A View FIGURE 4 ).

Description. Body length 11.7 mm, fore wing length 8.4 mm.

Head. In anterior view 1.2 × as broad as high. Maxillo-labial complex compact, maxillary palp six-segmented and labial palp four-segmented. Clypeus approximately twice as broad as high medially and with median longitudinal carina; apical margin quadrilobate, ventral lobes rounded; clypeus separated from inner margin of eye by 0.5 AOD ( Fig. 2B View FIGURE 2 ). Malar space short, approximately equal to AOD ( Fig. 2C View FIGURE 2 ). Frontal shelf of frons connected directly to dorsal margin of clypeus ( Fig. 2B View FIGURE 2 ). TFC evenly curved in anterior view, distinct between antennal inserts and obsolete above ( Fig. 2B View FIGURE 2 ). Frontal shelf in dorsal view moderately projecting ( Fig. 3A View FIGURE 3 ). Ocelli moderately large and slightly sunken; ocellar triangle compact, nearly equilateral ( Fig. 3A View FIGURE 3 ). AOD: OOL: IOL: OPL: POL = 1.0: 2.9: 10.0: 3.3: 1.9. Postocular space 2.0 AOD. Gena broad, in lateral view ventrally strongly convex ( Fig. 2C View FIGURE 2 ), in dorsal view with nearly right posterolateral angles ( Fig. 3A View FIGURE 3 ). Occiput with occipital carina developed laterally. Oral fossa bordered by an elevated carinate ridge, reaching mandibular base anteriorly and produced into an almost triangular lobe posteriorly. Antennal scape elongate, about as long as fore tarsus except basitarsus; flagellum clothed with dense scale-like sensillae; median flagellomeres bulging ventrally and not more than twice as long as broad ( Fig. 2A View FIGURE 2 ); ratio from first to last flagellomere as follows: 15: 14: 14: 13: 13: 13: 13: 13: 13: 17.

Mesosoma. Compact, median length 1.2 × as long as maximum width in dorsal view; in lateral view 1.6 × longer than high. Pronotum short, median length 0.3 × median width in dorsal view, anterior and lateral margins concave ( Fig. 3A View FIGURE 3 ). Mesoscutum trapezoidal, median length 0.6 × maximum width; notauli obsolete, parapsidal furrow distinct posteriorly and reaching slightly beyond posterior half of mesoscutum ( Fig. 3A View FIGURE 3 ). Mesoscutum-scutellar suture between lateral sclerites anteromedially rather narrow, slightly longer than median length of scutellum ( Fig. 3A View FIGURE 3 ). Scutellum in lateral view somewhat convex ( Fig. 3B View FIGURE 3 ), medially without longitudinal sulcus and expanded posteromedially by a narrow semicircular lamella ( Fig. 3A View FIGURE 3 ). Metanotum short, median sclerite 0.3 × as long as broad. Propodeum in dorsal view with very short, distinct horizontal surface and obtuse lateral angle ( Fig. 3A View FIGURE 3 ), posterior declivity in lateral view convex ( Fig. 3B View FIGURE 3 ). Tegula small, ovaloid. Coxae robust, hind coxa without dorsobasal carina ( Fig. 3B View FIGURE 3 ). Inner margin of fore tibial spur lamellate, lamella dentate apically and broadly separated from apical tip of spur; foretibia directly basad to spur with several moderately robust spines ( Fig. 3B View FIGURE 3 ). Middle and hind tibial spurs long and narrow. Tarsi short, especially fore and middle tarsus; combined length of apical tarsomeres of hind tarsus not exceeding that of basitarsus ( Fig. 1A View FIGURE 1 ); tarsal claws bidentate, with a mediumsized submedian tooth ( Fig. 1B View FIGURE 1 ).

Wings. First recurrent vein of fore wing received subbasally by second submarginal cell ( Fig. 4A View FIGURE 4 ). Second submarginal cell short, 1.3 × as long as high, veins 1r-m and 2r-m meeting M at almost a right angle ( Fig. 4A View FIGURE 4 ). Rs between 1r-m and 2r-m distinctly shorter than Rs between 3r-m and apical margin of marginal cell ( Fig. 4A View FIGURE 4 ). Minimum distance between 3r-m and apical wing margin 5.6 AOD ( Fig. 4A View FIGURE 4 ). Hind wing r-m distinctly convex and meeting M at an acute angle ( Fig. 4B View FIGURE 4 ).

Metasoma. Lateral margins in dorsal view gently convex and gradually converging towards metasomal apex, broadest in middle ( Fig. 3C View FIGURE 3 ). Anterior surface of T1 strongly sloping, somewhat concave and medially sulcate ( Fig. 3C View FIGURE 3 ), dorsal surface short and a little convex ( Fig. 1A View FIGURE 1 ); anterolateral spiracle not tuberculate. T2–4 approximately of equal length, posterior margin gradually becoming more emarginate medially ( Fig. 3C View FIGURE 3 ). Dorsal length of T5–6 much longer than preceding tergites, ratio from T3 to T6 as follows: 20: 20: 28: 31; posterior margin of T5 strongly emarginate, of T6 convex medially ( Fig. 3C View FIGURE 3 ).Apex of S6 protruding from under T6, so that it is visible in dorsal view ( Fig. 3C View FIGURE 3 ). Ventral aspect of metasoma more convex, posterior margin of S2–5 shallowly emarginate medially.

Sculpture. Head and mesosoma dorsally densely setiferous punctate-reticulate, punctures deep and with granulated, somewhat shiny interstices ( Figs 1A View FIGURE 1 , 2B View FIGURE 2 , 3A View FIGURE 3 ). Punctation of clypeus organized in longitudinal rows, remainder of head punctate-reticulate ( Fig. 2B View FIGURE 2 ). Pronotum, especially anteromedially, with relatively sparse and coarse punctation, that of mesoscutum, scutellum and metanotum punctate-reticulate ( Fig. 3A View FIGURE 3 ). Posterior surface of propodeum distinctly more sparsely punctate than dorsal and lateral surface except large lateral polished area ( Fig. 3A–B View FIGURE 3 ). Metasoma, except T1, practically entirely densely and moderately finely coriaceous ( Fig. 3C View FIGURE 3 ); T1 shinier and with distinct, fine and sparse punctation.

Pubescence. Entire body densely clothed with heterogeneous, erect to suberect, pale brownish to silvery setae ( Figs 1A View FIGURE 1 , 3A,C View FIGURE 3 ). Dorsal surface of head rather more sparsely setose, with few long erect trichiae and more numerous short suberect setae; especially gena with longer, denser suberect pilosity ( Fig. 2C View FIGURE 2 ). Mesosoma regularly setose with erect setae ( Fig. 1A View FIGURE 1 ). Fore coxa ventrally with scopa of extremely dense recumbent golden setae ( Fig. 1A View FIGURE 1 ). Fore wing regularly setose with very short erect micro-trichiae, somewhat denser distally than basally ( Fig. 4A View FIGURE 4 ). Metasoma clothed with dense short suberect to recumbent pubescence, longest on sloping anterior surface of T1 ( Fig. 1A View FIGURE 1 ); T5 and especially T6 and S6 with numerous long and erect bristly setae ( Figs 1A View FIGURE 1 , 3C View FIGURE 3 ).

Colour. Body black, the following are ivory: large dorsal spot on basal two-thirds of mandible; clypeus except apical margin and lateral lobes; spot on scape; narrow spot along inner margin of eye, filling ocular sinus and extending towards upper margin of eye; elongate median spot on frons, broadest between antennal inserts, narrowed medially and extending to anterior ocellus; ovaloid sublateral spot bordering lateral ocellus; posteromedian spot on vertex; large spot on gena extending to upper margin of eye; narrow band on anterior and posterior margin of pronotum, interrupted medially; submedian spot on mesoscutum; entire tegula; large spot axilla of scutellum; anterolateral spot on scutellum; large spot on metanotum, narrowly interrupted medially; large dorsolateral spot on propodeum; large dorsal spot on mesopleuron; nearly entire ventral aspect of coxae, fore trochanter, femora and tibiae; fore tibial spur; continuous bands along posterior margin of T1–4; band on T5 but interrupted medially; small submedian lateral spots on T6; bands on S2–5, band on S4 narrowly, on S5 broadly interrupted. The following are dark reddish brown: mandibular apex; maxillo-labial complex; wing veins including pterostigma; legs except pale spots; almost entire ventral aspect of metasoma except pale bands. Wings subhyaline, fore wing distinctly more pigmented near upper margin of wing.

Etymology. The specific epithet refers to the richly maculated and banded body.

Distribution. Insular Malaysia, northern Borneo.