Terryerwinia acutiphallica, 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 : 57-59

Terryerwinia acutiphallica sp. n. ( Figs. 13–22 )

Male. Color (in 80% alcohol). Body pale brown. Compound eyes black, ocelli hyaline, with ochre centripetal crescents. An irregular ochre spot on each gena, next to antennal fossae. Antennae and maxillary palps pale brown, Mx4 slightly more pigmented than the other palpomeres. Legs pale brown. Thorax pale brown, with some irregular ochre spots on pleurae. Wings hyaline, veins brown, with distal dark brown spots at wing margin. Abdomen whitish, with ochre, transverse, subcuticular rings.

Morphology. Labral tubercles prominent, each with two small, apical projections. Outer cusp of lacinial apex broad, with 6 denticles ( Fig. 15 ). Forewing pterostigma long, narrow anteriorly, wider in the middle; areola postica long, shaped like an scalene triangle ( Fig. 14 ). Hindwing Rs­M fused basally for a distance ( Fig. 14 ). Hypandrium ( Fig. 18 ), broad, setose, posteriorly straight, with distinctly protruding, setose, postero­lateral corners. Phallosome ( Fig. 17 ), semi­closed anteriorly, lateral struts slightly curved, aedeagal arch with an apical, stout, truncate projection, flanked by much longer, stout, acuminate projections, directed outwards. Endophallus constituted by a radula, formed by many wide­based, pointed, individual corns ( Figs. 17, 20 ). Paraprocts ( Fig. 16 ) broad, setose, with sensory fields elliptic, with 26–27 trichobothria issuing from basal rosettes. Epiproct ( Fig. 16 ) trapeziform, with a group of 3 mesal setae next anterior border, a row of setae along posterior border, and other setae as illustrated.

Measurements. FW: 4363, HW: 3187, F: 1118, T: 1359, t1: 691, t2: 142, ctt1:42, Mx4: 285, f1: 1282, IO: 294. D: 318, d: 308, IO/D: 0.92, PO: 0.96.

Female. Color (in 80% alcohol). Same as the male.

Morphology. Lacinial tip, labral tubercles and wing venation as described for the male. Subgenital plate ( Fig. 19 ) broad, setose, posteriorly rounded, glabrous on posterior third. Gonapophyses ( Fig. 21 ): v1 absent, v3 an elongate lobe on side of v2, with 8–9 setae; v2 robust, with short anterior heel and short acuminate distal process. Ninth sternum membranous with a thick central area, this with three posterior lobes and an elongate, elliptic posterior projection ( Fig. 21 ). Clunium slightly projected in area over epiproct. Paraprocts ( Fig. 22 ) broad, setose; sensory fields elliptic, with 18–19 trichobothria issuing from basal rosettes. Epiproct ( Fig. 22 ) trapeziform, with a group of 3 mesal setae next to anterior border, a dense field of setae posteriorly and other setae as illustrated.

Measurements. FW: 4153, HW: 3019, F: 1253, T: 2051, t1: 1015, t2: 159, ctt1: 41, Mx4: 283, f1: 1403, f2: 1011, IO: 335, D: 296, d: 286, IO/D: 1.13, PO: 0.96.

Material studied. Holotype ♂. PERU. Madre de Dios. Río Tambopata Reserved Area. 30 km (air) SW Puerto Maldonado, 230 m, 12°50’S: 69°17’W. Smithsonian Institution Canopy Fogging Project, 10 May, 1984 (04/02/062), (Terry L. Erwin et al.). Paratypes: Same locality and collectors, 9 March, 1984, 1♂, 2Ψ (04/02/065, 04/02/064, and 04/02/ 052). 10 May, 1984, 1♂, 4ΨΨ (04/02/077, and 01/03/089, 04/02/049, 04/02/050, 04/02/ 066). 8 Nov. 1983, 1♂ (04/02/069). Holotype, two paratypes ♂, and five paratypes Ψ, deposited in the Smithsonian Institution Collection, Washington, D. C. One paratype ♂, and one paratype Ψ (9 March, 1984, 04/02/064 and 10 May, 1984, 04/02/050) deposited in the Colección Nacional de Insectos, Instituto de Biología, Universidad Nacional Autónoma de México, México City, México.

Etymology. The genus name honors Dr. Terry L. Erwin (Smithsonian Institution, Washington, D. C.), and constitutes a small tribute to his seminal and heuristic work in several areas of entomology, particularly in systematics of the Carabidae . The species name refers to the acuminate projections of the aedeagal arch ( acutiphallica = having an acuminate phallus).

Remarks. The posterior, acuminate apophyses of the aedeagal arch, the postero­lateral projections of the hypandrium, the absence of v1, and the structure of the female ninth sternum, make this genus unique in the Epipsocidae . A cladistic analysis of the Epipsocetae (Casasola González, in progress), place this genus as sister group to Papillopsocus García Aldrete , the two genera having Epipsocus argutus New as sister group.

Figures

FIGURES 13 – 22. Terryerwinia acutiphallica. 13. Front view of head, ♂. 14. Fore­ and hindwing, ♂. 15. Lacinial tip, ♂. 16. Clunium, right paraproct and epiproct, ♂. 17. Phallosome, ♂. 18. Posterior border of hypandrium, ♂. 19. Subgenital plate, Ψ. 20. Corns of phallosome radula, ♂. 21. Gonapophyses and ninth sternum, Ψ. 22. Posterior border of clunium, epiproct and left paraproct, Ψ. Scales in mm. Figs. 21 and 22 to common scale.