Loneura digitiformis, Cutrim & Neto & García Aldrete & Rafael, 2021

Cutrim, Marcelo, Neto, Alberto Moreira Da Silva, García Aldrete, Alfonso N. & Rafael, José Albertino, 2021, Identification key, checklist and new species of Loneura Navás (Psocodea: ‘ Psocoptera’: Ptiloneuridae) from Brazil, Zootaxa 5057 (4), pp. 487-502 : 490-492

Loneura digitiformis n. sp. Male

( Figs 1–6 )

Diagnosis. It differs from the species of Loneura in Group I by having the central sclerite of the hypandrium with four projections, two short, latero-mesal projections and two longer, posterior projections. Phallosome with anterior pair of endophallic sclerites with digitiform ends. Forewing pattern similar to L. occidentalis González Obando, Carrejo, Panche & García Aldrete. Hypandrium unique for Loneura group I due to its four projections. Phallosome unique for the genera due to the digitiform posterior projection ends of the anterior pair of endophallic sclerites.

Male. Color. Compound eyes black, ocelli hyaline, with ocher centripetal crescents; head pattern ( Fig. 1 ). Scape pale brown, pedicel pale brown, f1–f3 pale brown. Mx4 brown. Femora pale brown, with brown smoky area proximally; tibiae pale brown; tarsomeres 1–3 pale brown. Forewings ( Fig. 2 ) with dark brown pigmented veins on R+Rs, Rs+M, M+CuA and along the CuA vein to the areola postica, pterostigma with brown bands proximally and distally, dark brown spots on vein ends at wing margin from R 2+3 to Cu1a, hyaline spot between CuA and CuP near to wing margin, a broad, continuous brown spot rising from the CuA vein filling all proximal area of the wing, becoming darker at the beginning of the A veins. Hindwings hyaline, veins brown ( Fig. 3 ).

Morphology. Outer cusp of lacinial tips broad, with five short denticles ( Fig. 1 ). Right forewing ( Fig. 2 ), pterostigma narrow proximally, wider in the middle; areola postica wide, tall, semicircular; Rs longer than its branches, convex medially, R 2+3 sinuous, with a median convex curve, R 4+5 sinuous with a marked median convex curve; M stem concave proximally, then almost straight, with six primary branches, transverse vein between M3 and M4 distally, M6 trifurcated, resulting in M 6a, M 6b and M 6c; left forewing same as the right one, except M with five primary branches, M2 and M5 bifurcated, resulting in M 2a, M 2b and M 5a, M 5b. Right hindwing ( Fig. 3 ) R 2+3 straight, R 4+5 slightly curved medially; M with three branches; left hindwing same as the right, except M with five branches. Hypandrium ( Fig. 4 ) of three sclerites, a central sclerite flanked anteriorly by little, triangular side sclerites, convex anteriorly, with four projections, two short, latero-mesal projections with sclerotized rounded apex, and two longer, broad, stout posterior projections with a wide median cleft between them. Phallosome ( Fig. 5 ) with side struts basally not fused, anteriorly V-shaped, narrow, elongated, pointed distally, not fused to external parameres, this wide and membranous proximally, narrowing distally, with inward directed lobed projections bearing a field of pores. Two pairs of endophallic sclerites; an anterior pair elongate, curved basally, proximally with outward directed end slender, wide in the middle, narrowing distally with inward curved end, arising from its base a membranous inward projection, almost touching each other; a posterior pair stout, curved basally, with lateral sclerotized projections, the inner ends round, and the outer tapering, then sclerotized areas proximally, inwardly curved medially, then a long stretch, distally with digitiform ends. Epiproct ( Fig. 6 ) trapezoid, with a posterior, median short process, acuminated lateral margins and three central short setae as illustrated. Paraprocts ( Fig. 6 ) broad based, distal border straight; sensory fields with 33 trichobothria on basal rosettes, setae as illustrated.

Measurements (in microns). FW: 4906, HW: 3211, F: 1251, T: 1298, t1: 863, t2: 57, t3: 138, f1: 813, f2: 661, f3: 549, Mx4: 271, IO: 482, D: 446, d: 305, PO: 0.68.

Material studied. Holotype male (INPA). BRAZIL. Santa Catarina. Nova Teutônia. 300–500 m, 27º11’S: 52º23’W. VIII.1972. Fritz Plaumann ; Paratype male (INPA). Same country as the holotype. Paraná. Guarapuava. 22.xii.1996. Profaupar. Malaise, P –2 (without remaining parts) .

Etymology. The specific epithet refers to the digitiform ends of the anterior pair of endophallic sclerites.

Figures

FIGURES 1–6. Loneura digitiformis n. sp. Male. 1. Front view of head. 2. Right forewing. 3. Right hindwing. 4. Hypandrium. 5. Phallosome. 6. Left paraproct and epiproct. Scales in mm.