Incapsocus penai, García, Alfonso N. & Aldrete, 2005

García, Alfonso N. & Aldrete, 2005, Three new monotypic genera of Epipsocidae (Psocoptera) from Peru and Brazil, Zootaxa 1077, pp. 51-60 : 53-54

Incapsocus penai , sp. n. ( Figs. 1–5 )

Color (in 80% alcohol). Body pale brown. Compound eyes black, ocelli hyaline, without pigmented centripetal crescents. Epicranial sulcus ochre, well defined. Wings almost hyaline, with a faint yellowish hue; veins pale brown, forewing pterostigma dark brown. Abdomen dirty white, with ochre, transverse subcuticular rings.

Morphology. Epicranial sulcus with very short lateral arms. Outer cusp of lacinial tip broad, with 6 denticles ( Fig. 2 ). Five distal inner labral sensilla, of same size, in line: one central placoid and on each side of it one trichoid and one placoid. Forewing ( Fig. 1 ) with pterostigma broadly triangular, narrow anteriorly and widening distally; Rs forked, each stem divided in two branches. Right forewing with M 5­branched, left forewing with M 6­ branched. Areola postica low, elongate. Hindwing ( Fig. 1 ) with Rs­M joined by a long fusion, M forked. Hypandrium ( Fig. 4 ) rounded distally, pigmented area concave, setae as illustrated, continuous along posterior border, without defined lateral fields. Phallosome ( Fig. 3 ) simple, open anteriorly, aedeagal arch broad­tipped; without external parameres, phallic sclerites absent. Clunium projected posteriorly in area over epiproct ( Fig. 5 ). Paraprocts robust, with setae as illustrated, a field of microspines mesally on outer edge, and sensory field slightly elliptic, with 29–30 trichobothria issuing from basal rosettes ( Fig. 5 ). Epiproct trapeziform, with 3 setae and a field of microspines along posterior border, a field of postero­mesal setae, and a group of 5 setae, on line, near anterior border.

Measurements. FW: 4039, HW: 2920, F: 901, T: 1734, t1: 695, t2: 183, ctt1: 28, f1: 799, f2: 795, f3: 602: IO: 495, D: 302, d: 233, IO/D: 1.63, PO: 0.77.

Material studied. Holotype ♂. PERU. Department of Cuzco. Quincemil (13.2°S: 70°77’W, 619 m), IX.1962, in tropical forest (Luis E. Peña), E. L. Mockford collection, Illinois State University, Normal, Illinois, U. S. A.

Etymology. The genus name is a composite word from Inca, a dominant ethnic Peruvian group, and psocus= psocid. The species is dedicated to its collector.

Remarks. Preliminary results of a phylogenetic analysis of the 40 genera that comprise the infraorder Epipsocetae (Casasola González, in progress), place Incapsocus in a clade as sister group to an assemblage constituted by Cubitiglabra , Goja , and Ianthorntonia . The clade is supported by having wing venation supernumerary (=forewing with Rs more than 2­branched, M more than 3­branched, and hindwing with M forked). Incapsocus stands apart from the above 3 genera on account principally of genital differences and wing venation details: Cubitiglabra has a closed phallosome and distinct external parameres; Goja and Ianthorntonia are sister genera, presenting a complex phallosome, with external parameres and well defined phallic sclerites.

Geographically, Incapsocus , some species of Goja , and Ianthorntonia are Andean, while the two known species of Cubitiglabra are Chinese.

Figures

FIGURES 1 – 5. Incapsocus penai. Male. 1. Fore­ and hindwing. 2. Lacinial tip. 3. Phallosome. 4. Hypandrium. 5. Posterior border of clunium, right paraproct and epiproct. Scales in mm. Figs. 3 – 5 to common scale.