Trichadenotecnum brevicornum, Yoshizawa & Aldrete & Mockford, 2008

Yoshizawa, Kazunori, Aldrete, Alfonso Neri García & Mockford, Edward L., 2008, Systematics and biogeography of the New World species of Trichadenotecnum Enderlein (Insecta: Psocodea: ‘ Psocoptera’: Psocidae), Zoological Journal of the Linnean Society 153 (4), pp. 651-723 : 692-694

TRICHADENOTECNUM BREVICORNUM SP. NOV.

Material examined: Holotype. Male. Mexico: Chiapas, 4 km N Tuxtla Gutiérrez , 15.vii.1962, ELM ( ISU).

Etymology: The specific epithet is taken from Latin brevis (= short) + cornu (= horn), in reference to the short hypandrial left process of this species.

Description: Male (teneral). Head. White in ground colour; vertical and orbital markings pale brown; coronal suture black; frontal suture bordered with narrow pale brown band dorsally; frons with pale brown marking ventro-medially and pair of spots laterally; ventral and dorsal margins of gena pale brown; eye black, IO/D = 0.9; ocelli white, ocellar field black; antennal socket bordered with broad pale brown band; postclypeus with c. eight rows of pale brown spots, fused with each other ventrally forming a large marking, ventro-lateral corner white, dorsal margin without marking; anteclypeus pale brown. Antenna pale brown, scape brown. Mouth parts white.

Thorax. Prothorax pale brown. Mesonotum white; anterior surface of scutum pale brown; anterior margin of lateral lobe of scutum brown; scutellum white, anterior margin brown; postnotum pale brown. Metanotum pale brown, with three white oval spots on posterior regions of lobes of scutum. Mesopleuron white, except dorsal half pale brown. Metapleuron brown except membranous region white.

Legs. White; middle and hind coxae pale brown; all femora with blackish brown spot at distal end ventrally; hind femur with slightly darker portion near distal end.

Forewing ( Fig. 17I ). Spots in cell a 1 apparent, basal one small. Opposing spots in cell r distinct only for posterior spot, anterior spot indistinct. Proximal band narrow and somewhat indistinct in cell CuA, broadly interrupted just beyond fork of M + Cu. Distal band narrow and faint. Spot on roof of cell m 3 narrow but distinct. Submarginal spots apparent; spot in cell r 5 elongate. Marginal clouds faint. Hindwing. Hyaline, cell CuP with faint brownish marking; veins pale brown.

Abdomen. White, each segment with blackish brown band. Terminalia. Clunial arm ( Fig. 31A ) weakly developed, with membranous lobe covered with short spines. Anterior margin of 8th sternum ( Fig. 31C ) with semicircular extension medially, fusion with hypandrium narrow. Epiproct lobe ( Fig. 31B ) wider than

Key to species of the concinnum group

1. Clunial arm with well-sclerotized and denticulated lobe basally ( Fig. 34A ); female unknown...........................2

– Clunial arm with less sclerotized and smooth surfaced lobe basally ( Fig. 32A ).............. T. concinnum sp. nov.

2. Dorsal margin of epiproct lobe deeply hollowed medially, dorso-lateral corner acute ( Fig. 35B ).......................... ................................................................................................................... T. nicaraguense sp. nov.

– Dorsal margin of epiproct lobe shallowly hollowed medially, dorso-lateral corner rounded ( Fig. 34B ).................. ........................................................................................................................... T. acutum sp. nov.

long, dorsal margin slightly concave, with rounded projection medially, posterior surface with swelling medially near dorsal margin. Paraproct ( Fig. 31A ); ventro-lateral band absent; distal process long. Hypandrium ( Fig. 31C ): left process short, not reaching right process, conical, curved inwards; right process well developed, projected posteriorly, then strongly bent postero-internally near base; median tongue broadened apically, apical margin with median notch, dorsal keel rounded. Phallosome ( Fig. 31D ): pseudoparameres widely separated, long, slightly longer than wide, directed posteriorly, apical margin rounded, postero-internally with serrated projection. Phallobase nearly parallel sided, then narrowing to pointed anterior end.

Length. B 2.3; FW 2.6; HW 1.9.

Female. Unknown.

Distribution: Mexico.

Figures

Figure 17. Forewings of Trichadenotecnum erwini (A), T. chiapense (B), T. quaesitum (C), T. quaesitellum (D), T. cerrosillae (E), T. maculatum (F), T. neoleonense (G), T. ericium (H), T. brevicornum (I), T. concinnum (J), T. acutum (K) and T. nicaraguense (L.).

Figure 31. Male terminalia structures of Trichadenotecnum brevicornum, showing terminalia in lateral view (A), epiproct in posterior view (B), hypandrium in ventral view (C) and phallosome in ventral view (D).

Figure 32. Male terminalia structures of Trichadenotecnum concinnum, showing terminalia in lateral view (A), epiproct in posterior view (B), hypandrium in ventral view (C) and phallosome in ventral view (D).

Figure 34. Male terminalia structures of Trichadenotecnum acutum, showing terminalia in lateral view (A), epiproct in posterior view (B), hypandrium in ventral view (C) and phallosome in ventral view (D).

Figure 35. Male terminalia structures of Trichadenotecnum nicaraguense, showing terminalia in lateral view (A), epiproct in posterior view (B), hypandrium in ventral view (C) and phallosome in ventral view (D).