Lachesilla furthi, Aldrete & Casasola-González, 2021

Aldrete, Alfonso Neri García & Casasola-González, José Arturo, 2021, Three new species of Lachesilla in the rufa group (Psocodea: Psocomorpha: Lachesillidae) from the Sierra Tarahumara, Mexico, Zootaxa 5071 (2), pp. 289-295: 292

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Lachesilla furthi

n. sp.

Lachesilla furthi   n. sp.

( Figs 6−9 View FIGURES 6−9 )

Diagnosis. Mesal flap of the subgenital plate mid-sized, with anterior border extended laterally, body of the flap narrowing posteriorly, the distal concavity about one third the length of the flap. Gonapophyses long, sides almost parallel, distally blunt. Spermapore in the center of the ninth sternum, this anteriorly with three, approximately triangular short processes in the middle. Although much shorter, the flap of the subgenital plate, on account of the anterior side extension, is reminiscent to those of L. gurneyi García Aldrete   , from Durango, Hidalgo and Mexico City, and to L. salamana García Aldrete   , from Guatemala.

Female. Color (in 80% ethanol). Body tawny brown. Compound eyes black, ocelli hyaline, with pale brown centripetal crescents. Maxillary palps dark brown, antennae and legs pale brown. Wings hyaline, veins brown. Tergal lobes of meso- and metathorax slightly more pigmented. Abdomen with pale brown, transverse subcuticular bands.

Morphology. Compound eyes below the level of the vertex. Forewing pterostigma wider posteriorly, Rs and M diverging from a point, areola postica wide, broadly triangular ( Fig. 6 View FIGURES 6−9 ). Hindwing as in Fig. 6 View FIGURES 6−9 . Subgenital plate ( Fig. 9 View FIGURES 6−9 ) straight anteriorly, posterior border straight, posterior third glabrous, setae as illustrated, mesal flap ( Fig. 9 View FIGURES 6−9 ) as described in Diagnosis. Gonapophyses and ninth sternum ( Fig. 8 View FIGURES 6−9 ). Paraprocts ( Fig. 7 View FIGURES 6−9 ) semicircular, setose as illustrated, sensory fields rounded, with 9−10 trichobothria in basal rosettes, and one marginal trichobothrium without basal rosette. Epiproct ( Fig. 7 View FIGURES 6−9 ) trapeziform, setae on posterior half.

Measurements. FW: 1956, HW: 1562, F: 354, T: 686, t1: 186, t2: 107, ctt1: 12, f1: 348, f2: 161, f3: 128, f4: 87, f5: 58, f6: 54, f7: 39, f8: 87, IO: 266, D: 150, d: 100, IO/d: 2.66, PO: 0.66.

Specimens studied. Holotype female, MEXICO, Chihuahua, Sierra Tarahumara, Basaseachic waterfall, 28º10.623’N: 108º12.79’W, 870m, 20.IX.2002, Beating dead branches with lichens, J. A. Casasola González. GoogleMaps  

Records. MEXICO, Chihuahua, Sierra Tarahumara, Cusárare waterfall, 21 km SE Creel, 27º37’27’’N: 107º33’58’’W, 2080 m, 16.VI.2002, Beating Cupressus   branches with dead leaves, GoogleMaps   1 female, A. N. García Aldrete; Hwy. Creel-Guachochi, rd. to El Tejabán, 27º35.414’N: 107º32.742’W, 2140 m, 15.XI.2002, Beating Juniperus   foliage, 1 female, J. A. Casasola González GoogleMaps   .

Etymology. This species is dedicated to Dr. David G. Furth, formerly of the Smithsonian Institution National Museum of Natural History (Washington, D.C.), in recognition of his important studies on Alticinae   ( Chrysomelidae   ), particularly on the diversity of the Sierra Tarahumara Copper Canyon (Research on Chrysomelidae, Vol.   2, pp. 131−151, Koninklijke Brill, Leiden 2009).