Polana (Angusana) pilosa Gonçalves & Takiya & Mejdalani 2018, sp. nov.

Polana (Angusana) pilosa sp. nov.

(Figs 1–9, 40, 41)

Diagnosis. Male pygofer (Fig. 4), in lateral view, narrowed on apical half; style (Figs 6, 7) with apex bearing tiny dorsal denticles; aedeagal shaft (Figs 8, 9) with pair of small apical processes; processes of dorsal apodeme bilobate at apex.

Description (male holotype). Length 8.7 mm. Head (Fig. 40), in dorsal view, not produced anteriorly; distinctly narrower than pronotum; transocular width about three-fourths of humeral width of pronotum. Crown (Fig. 40) short, median length approximately two-fifths of interocular width; anterior and posterior margins approximately parallel, anterior margin slightly rounded; surface slightly concave; texture with parallel transverse striations; coronal suture distinct on basal half of crown. Ocellus large; equidistant between anterior and posterior margins of crown; closer to midline than to adjacent compound eye. Transition between crown and face (Fig. 41) defined, broad; transversely striated. Face (Fig. 1) slightly wider than high. Frontogenal suture extending upwards, beyond antennal ledge, to anterior margin of crown. Antennal ledge, in frontal view, oblique downward in relation to frons; extending inwardly beyond frontogenal suture. Frons (Fig. 1) slightly swollen; dorsal third concave; lateral margin separated from lateral margin of eye by distance shorter than maximum width of clypeus. Epistomal suture indistinct. Clypeus (Fig. 1) higher than wide; expanded apically; in lateral view (Fig. 41), slightly swollen medially.

Pronotum, in dorsal view (Fig. 40), with lateral margins convergent anteriorly; posterior margin slightly excavated; disk transversely striated; in lateral view (Fig. 41), strongly declivous anteriorly. Mesonotum (Fig. 41) with scutellum slightly swollen. Forewing (Fig. 2) subhyaline; venation distinct, not reticulated; membrane without punctures; apex rounded; appendix well developed, broad, extending only to second apical cell. Forefemur with AD, AM, and PD rows reduced and poorly defined, except for apical setae AD1, AM1, and PD1, respectively; AV row formed by two or three large setae, spaced apart and restricted to basal half, and large apical seta, AV1, posterior to IC row; latter formed by slightly arched comb of fine setae beginning at apical half of femur and extending to AM1; PV row formed by four to five setae spaced apart and occupying entire femur, proximal setae distinctly smaller than others. Hind leg with femoral setal formula 2:2:1; tibial AD row with long spiniform setae with prominent bases and with two or more intercalary microsetae distributed along distal half; first tarsomere with two parallel rows of setae on ventral surface; pecten with three platellae medially, flanked by longer tapered lateral setae; apex of second tarsomere with two apical platellae flanked by longer tapered lateral setae.

Coloration. Venter pale yellow and dorsum mostly dark brown (Figs 40, 41). Crown (Fig. 40) yellow with brown area between ocelli and dark brown band extending from each ocellus to inner margin of adjacent compound eye. Face (Fig. 1) yellow without distinct maculae. Pronotum (Fig. 40) with pair of dark brown maculae near anterior margin; pair of irregular yellow stripes extending from humeral angles to median region of anterior margin; portion anterad of stripes pale yellow, portion posterad of stripes dark brown; weak yellowish median longitudinal stripe at anterior two-thirds. Mesonotum (Fig. 40) with anterior half brown and posterior half brownish-yellow; basolateral angles and medioanterior region dark brown; with four small yellow markings, two near basolateral angles and two adjacent to scutellar suture. Forewing (Fig. 2) mostly dark brown; clavus with four small yellow markings, first basal and adjacent to claval sulcus, second between veins 1A and 2A near base, third and fourth between veins 1A and 2A close to anal margin; corium with costal region with two colorless hyaline areas, one at basal third and another at apical third; one pale yellow macula at base. Legs (Fig. 41) yellow with proximal and distal portions of tibia dark brown.

Male terminalia. Sternite VIII (Fig. 3) longer than wide, median length approximately 1.3 times greater than maximum width; lateral margins slightly converging towards apex; posterior margin truncated. Pygofer (Fig. 4) 1.8 times longer than maximum height; dorsal margin approximately straight, without inner process; ventrocaudal margin broadly rounded; apex rounded; macrosetae numerous and distributed throughout dorsal region of apical half. Subgenital plate, in lateral view (Fig. 4), not exceeding pygofer apex; in ventral view (Fig. 5), 4.7 times longer than maximum width; lateral margins approximately parallel, except at basal third where outer margin is laterally expanded; apex rounded; ventral surface with numerous filiform elongate setae distributed adjacent to whole external margin. Connective (Fig. 6) Y-shaped; stem slightly shorter than arms; total length about one-third of style length. Style, in dorsal view (Fig. 6), with outer lobe developed and produced; in lateral view (Fig. 7), blade slightly curved dorsally; ventral margin slightly serrated at median portion; apex rounded and contoured by several tiny denticles. Aedeagus (Figs 8, 9) with preatrium very short; dorsal apodeme developed, bearing pair of processes directed posteriorly and bent dorsally at right angle, apexes of processes expanded and bilobate, ventral lobe longer, thin, and acute in comparison with dorsal lobe; shaft compressed laterally, broad at basal half, apical half narrowing progressively towards apex; with pair of slight flanges at median third of shaft; apex with pair of short and thin lateral processes, directed dorsally.

Female unknown.

Etymology. The name of the new species alludes to the filiform setae that cover the subgenital plates (Figs 4, 5).

Material examined. Male holotype: “ Peru, Dept. Amazonas \ Distr. Aguas Verdes, Bagual/\ Tarapoto, Rd (5N) at km\ 403, malaise, 22–29.v.2009 \ M.E. Irwin & G. Antón Amaya,\ 1125m, 05°41’23”S,\ 77°38’13”W.”; “DNA voucher\ Entomologia DZRJ \ ENT 2813” (MUSM).

Remarks. Polana (Angusana) pilosa sp. nov. is similar to P. (A.) exornata in appearance and color (Figs 42, 43). However, P. exornata differs from the new species in having the style with apex acute and without denticles and the aedeagus with shaft compressed dorsoventrally and with two pairs of subapical processes.

Additional material examined. Polana exornata, male allotype: “ Darien Prov. \ Santa Fe,\ Panama VI-2-67 ”; “ D.M.DeLong &\ C.A.Triplehorn \ Collectors ”; “ D.M.DeLong \ Collection ” (OSU).