Systematics and biogeography of the New World species of Trichadenotecnum Enderlein (Insecta: Psocodea: ‘ Psocoptera’: Psocidae) Author Yoshizawa, Kazunori Author Aldrete, Alfonso Neri García Author Mockford, Edward L. text Zoological Journal of the Linnean Society 2008 2008-08-31 153 4 651 723 https://academic.oup.com/zoolinnean/article-lookup/doi/10.1111/j.1096-3642.2008.00398.x journal article 10.1111/j.1096-3642.2008.00398.x 0024-4082 5446195 TRICHADENOTECNUM ACUTUM SP. NOV. Material examined: Holotype . Male. Mexico : 40 mi S Oaxaca City , 19.viii.1968 , ELM ( ISU ) . Paratypes . 2 males , same data as holotype ( ISU ) . Etymology: The specific epithet is taken from the Latin acutus (= sharp), indicating the narrow and pointed clunial arm of this species. Figure 33. Female genitalia of Trichadenotecnum concinnum , showing subgenital plate (A), gonapophyses (B) and internal plate (C) in ventral view. Description: Male . Head . White in ground colour; vertical and orbital markings brown; coronal suture black; frontal suture bordered with narrow pale brown band; frons with pair of pale brown bands at middle and with pair of brown spots laterally; gena white; eye black, IO/D = 1.1; ocelli white, ocellar field black; antennal socket bordered with narrow brown band; postclypeus with c . 10 rows of pale brown spots dorsally, fused with each other ventrally to form a large blackish brown marking, lateral margin of postclypeus brown, ventro-lateral corner without marking; anteclypeus brown. Antenna pale brown, pedicel and scape darker. Mouth parts pale brown; 4th segment of maxillary palpus brown. Thorax . Prothorax brown. Mesonotum pale brown; anterior surface of scutum pale brown; anterior margin of lateral lobe of scutum black; scutellum brown, anterior margin darker; postnotum white. Metanotum brown, with white spot on posterior region of lateral lobe of scutum; anterior margin of scutellum darker. Mesopleuron white except dorsal third brown. Metapleuron brown except membranous region white. Legs. Coxae and tarsi of all legs and hind femur brown; fore and middle femora pale brown with white part medially; tibiae pale with brown part near distal end. Forewing ( Fig. 17K ). Spots in cell a 1 apparent, distal spot large. Opposing spots in cell r distinct but anterior spot less so. Proximal band narrow, broadly interrupted just beyond fork of M + Cu. Distal band narrow and faint. Spot on roof of cell m 3 distinct. Submarginal spots apparent; spot in cell r 5 larger; spots in cells r 1 and m 3 indistinct. Marginal clouds faint. Hindwing. Hyaline, cell CuP with group of faint brown spots in distal half; veins brown. Abdomen . White, each segment with irregular brown band. Terminalia . Clunial arm ( Fig. 34A ) well sclerotized, apical part long and slender, forming free needle-like process, antero-ventrally with strongly sclerotized lobe covered with denticles. Eighth venter ( Fig. 34C ) with transversal sclerite, anterior margin rounded, posteriorly fused with hypandrium at middle. Epiproct lobe ( Fig. 34B ) wider than long, broadened dorsally, dorsal margin with conical process medially, posterior surface almost flattened. Paraproct ( Fig. 34A ): ventro-lateral band small, rectangular; distal process short. Hypandrium ( Fig. 34C ): left and right processes well developed, rising from postero-lateral corners, slightly curved, apices directed posteriorly; median tongue constricted medially, posterior margin with rounded notch medially, ventral surface smooth with few wrinkles, dorsal keel shallowly rounded. Phallosome ( Fig. 34D ): pseudoparameres widely separated, broad and short, wider than long, rounded apically. Phallobase narrowing to pointed anterior end. Length . B 2.1–2.3; FW 3.0–3.1; HW 2.3–2.4. Female . Unknown. Distribution: Mexico .