Lachesilla sharpi, García Aldrete, 2017

García Aldrete, Alfonso N., 2017, New species of Lachesilla (Psocodea: Psocomorpha: Lachesillidae), in species group corona, from southern Mexico and Central America, Zootaxa 4347 (2), pp. 201-227 : 219-222

Lachesilla sharpi n. sp.

( Figs 51–56 )

Diagnosis. Hypandrium wide, deeply concave posteriorly, posterior processes broad, with inner corner projected. Phallosome with apodemes separated, widely joined proximally by membranes, each apodeme long, slender, slightly dilated distally, crossing with each other, curved inward, bearing apically a field of microspines on outer border. Subgenital plate rounded posteriorly, flap anteriorly narrow, widening towards rounded posterior border. Gonapophyses short, stout, distally blunt, with proximal and outer borders sclerotized, the latter projected towards the clunium. Ninth sternum broad, longer than wide, pigmented anteriorly, constricted on each side.

Description. Male. Color (44–49 years in 80% ethanol). Body reddish brown. Compound eyes black, ocelli hyaline, without pigmented centripetal crescents. Maxillary palps dark brown, antennae and legs pale brown. Wings hyaline, veins brown, R1 and stigmasaum ochre. Tergal lobes of meso- and metathorax slightly more pigmented than surroundings. Abdomen whitish, with brown subcuticular rings, faded ventrally.

Morphology. As in diagnosis, plus the following: Compound eyes slightly below the level of the vertex. Forewing pterostigma wider distally. Rs-M fused for a short distance, areola postica wide, apically rounded ( Fig. 51 ). Hypandrium ( Fig. 54 ), with a setal field on each side, other setae as illustrated, a sclerotized band along posterior border, between the posterior processes. Phallosome ( Fig. 54 ). Paraprocts ( Fig. 52 ) broad, sensory fields with 10 trichobothria, prong almost straight, distally truncate. Epiproct ( Fig. 52 ) slightly concave anteriorly, bilobed posteriorly, strongly sclerotized along sides and posterior border of each lobe, setae as illustrated.

Measurements. FW: 2188, HW: 1598, F: 420, T: 838, t1: 238, t2: 92, ctt1: 12, Mx4: 104, f1: 236, f2: 198, f3: 166, f4: 129, f5: 83, IO: 325, D: 191, d: 110, IO/d: 2.95, PO: 0.57.

Female. Color (44–49 years in 80% ethanol). Same as in the male.

Morphology. As in diagnosis, plus the following: Subgenital plate ( Fig. 55 ), gonapophyses and ninth sternum ( Fig. 53 ). Paraprocts ( Fig. 56 ), elliptic, setae as illustrated, sensory fields with 10 trichobothria. Epiproct ( Fig. 56 ), broadly trapeziform, setae as illustrated.

Measurements. FW: 1606, HW: 1356, F: 380, T: 749, t1: 232, t2: 92, ctt1: 12, Mx4: 92, f1: 218, f2: 181, f3: 137, f4: 112, f5: 77, f6: 64, IO: 307, D: 142, d: 84, IO/d: 3.65, PO: 0.59.

Specimens studied. Holotype male. GUATEMALA. 41.6 km N El Rancho, rd. To Cobán. 29.viii.1968. Beating Pinus branches and foliage. E. L. Mockford & A. N. García Aldrete. 1 paratype female . Same data as the holotype (ISU).

Etymology. This species honors the memory of David Sharp, author of the Insecta. Coleoptera . Volume. II, Part 1 (1887–1905), Insecta. Coleoptera . Rhynchophora. Volume IV. Part 3 (1889–1911), and co-author of the Insecta. Coleoptera . Pectinicornia and Lamellicornia. Volume II, Part 2 (1886–1890), Insecta. Coleoptera . Rhynchophora. Volume IV. Part 6 (1895–1907) and Insecta. Coleoptera . Longicornia and Bruchides. Volume V (1879–1886), of the Biologia Centrali-Americana.

Remarks. This species, as well as L. lacustrina García Aldrete (2015 a) , has the phallosome apodemes widely separated and joined proximally by membranes; in both species the phallosome apodemes have apically a row of microspines on the outer border, but the hypandrium is quite different in the two species (compare Fig. 54 in this paper with Fig. 10 in García Aldrete, 2015 a). The female ninth sternum is unique in being distinctly constricted on the sides.

Figures

FIGURES 51 – 56. Lachesilla sharpi n. sp. 51. Fore- and hind- wings. Female. 52. Epiproct and right paraproct. Male. 53. Gonapophyses and ninth sternum. Female. 54. Hypandrium and phallosome. Male. 55. Subgenital plate. Female. 56. Epiproct and right paraproct. Female. Scales in mm.

FIGURES 8 – 13. Lachesilla cameroni n. sp. 8. Fore- and hind- wings. Male. 9. Gonapophyses and ninth sternum. Female. 10. Subgenital plate. Female. 11. Hypandrium and phallosome. Male. 12. Epiproct and right paraproct. Female. 13. Epiproct and right paraproct. Male. Scales in mm.