Lachesilla dividiproctus, García, Alfonso N., 2009

García, Alfonso N., 2009, New species and records of Psocoptera (Insecta) from Argentina, Zootaxa 2219, pp. 1-17 : 7-8

Lachesilla dividiproctus n. sp.

( Figs. 16–18 )

Diagnosis. Belonging in species group pedicularia. Distal ends of claspers free. Phallosome apodeme widening posteriorly, T-shaped. Paraprocts of two pieces, proximal one strongly sclerotized, articulated to clunium, distal one with strong, mesal prong. Epiproct broad, with long, stout posterior projection divided in two long arms, the right one divided distally into an outer, acuminate arm, and an inner, spoon-like process; the left arm long, distally acuminate, with a slender, acuminate projection on the outer edge of the proximal half ( Fig. 17 ).

Morphology. As in diagnosis, plus the following: forewing pterostigma almost rectangular, wider posteriorly. Rs-M veins diverging from a point, areola postica rounded apically ( Fig. 16 ). Hindwing Rs-M fused for a distance ( Fig. 16 ). Hypandrium almost triangular, setose ( Fig. 18 ). Claspers ( Fig. 18 ) elliptic, setose, with a sclerotized band along inner edge, distal ends straight, slender. Phallosome apodeme long, slender, widening distally, with side arms slender, each associated with a round, rugose body ( Fig. 18 ). Clunium projected over the area of the epiproct; this, wide, narrow, with setae as illustrated ( Fig. 17 ). Proximal piece of paraproct bearing an elliptic sensory field with 11–12 trichobothria on basal rosettes and a marginal one without basal rosette, distal piece, with setae as illustrated ( Fig. 17 ).

Measurements. FW: 2203, HW: 1675, F: 439, T: 852, t1: 302, t2: 89, ctt1: 20, IO: 332, D: 185, d: 121, IO/D: 1.79, PO: 0.65.

Material studied. Holotype male, 15 paratype males. ARGENTINA, Salta Province, 22 km N La Caldera, 1550m., El Ucumar, 2–30.XII.1987, Malaise FIT, Subtropical humid forest. S. & J. Peck ( MHNG).

Records. ARGENTINA, Salta Province, El Rey National Park, 880m, Río Los Puestos, 8 males, 6– 16.XII.1987, Malaise FIT, Prosopis forest, S. & J. Peck, ( CNIN); 900m. Río La Sala, 1 male, 5–10.XII.1987, Malaise FIT, open stream side in forest, same collectors; same locality and collectors, 2 males, 5–15.XII.1987, night beating, humid moss and Chaco forest; same collectors and date, 3 males, Malaise FIT, Yungas forest. Salta Province, 17 km. N La Caldera, Alto de la Sierra, 1550 m, 1 male, 2–30.XII.1987, Malaise FIT, subtropical humid forest, S. & J. Peck; Jujuy Province, Calilegua National Park, Aguas Negras, 500m, 1 male, 18–28.XII.1987, gallery forest, Malaise FIT, S. & J. Peck ( MHNG).

Etymology. The specific name refers to the epiproct projection, divided in two arms, each itself divided in two, the right one distally and the left one proximally.

Figures

FIGURES 16 – 18. Lachesilla dividiproctus n. sp. (male). 16. Fore- and hindwing. 17. Clunium, epiproct and paraprocts. 18. Hypandrium, claspers and phallosome apodeme. Scales in mm. Figures 17 and 18 to common scale.