Trichadenotecnum acutolingum, 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 : 665-666

TRICHADENOTECNUM ACUTOLINGUM SP. NOV.

Material examined: Holotype. Male, Mexico: Nuevo León, Galeana, Cerro Potosí , 3090 m, 29.viii.1979, ANGA & M.C. Herrera ( UNAM) . Paratypes. 3 females, same data as holotype ( UNAM) .

Etymology: The specific epithet is taken from the latin acutus (= pointed) + lingua (= tongue), refering to the apically pointed hypandrial median tongue of this species.

Description: Male. Head. White in ground colour; vertical and orbital markings dark brown; coronal suture black; frontal suture dorsally bordered with pale brown band broadened externally; frons with two pairs of dark brown bands, internal pair darker; ventral half of gena dark brown; eye black, small, IO/D = 1.5; ocelli white, ocellar field black; antennal socket bordered with dark brown band; postclypeus with c. eight rows of blackish brown spots, fused with each other ventrally forming a large marking, ventrolateral corner white; anteclypeus dark brown. Antenna brown, pedicel and scape darker. Mouth parts brown.

Thorax. Prothorax brown. Meso- and metathorax mostly dark brown except membranous region white; mesonotum with white region medially, dorsal surface of anterior lobe and anterior region of lateral lobes of mesoscutum paler.

Legs. Brown; distal half of fore femur and tibiae of all legs paler; middle and hind coxae and hind femur dark brown.

Forewing ( Fig. 5B ). Moderately spotted. Spots in cell a 1 distinct, distal spot larger. Opposing spots in cell r distinct but anterior one small, widely separated from each other. Proximal band faint, darker and distinct in cell CuP, just below fork of M + Cu and along vein M. Distal band faint but distinct. Spot on roof of cell m 3 small. Submarginal spots hardly distinct, spot in cell r 5 larger and distinct, spots in cells m 1 and m 2 distinct. Marginal clouds indistinct. Hindwing. Hyaline, cell CuP with faint sparse spots; veins brown.

Key to species of the desolatum group (Many unidentified specimens are not keyed out and thus will incorrectly fall into identified species. Refer to species diagnoses and illustrations of wing markings and genital structures for exact identification of species.)

1. Males ............................................................................................................................................ 6

– Females ......................................................................................................................................... 2

2. Anterior margin of body of subgenital plate apparently hollowed, with broad but relatively shallow (not or slightly exceeding middle of body of subgenital plate) membranous notch medially ( Fig. 7A )....................................3

– Anterior margin of body of subgenital plate almost straight, with relatively deep (far exceeding middle of body of subgenital plate) and narrow membranous notch medially ( Fig. 15A )........................... T. latipenne sp. nov.

3. Egg guide of subgenital plate nearly parallel sided at apex, with almost straight apical margin ( Fig. 7A ) ....... 4

– Egg guide of subgenital plate gradually narrowing apically, with rounded apical margin ( Fig. 9A ) ...................................................................................................... T. acutolingum sp. nov.

4. Egg guide with broad pale pigmented area medially ( Fig. 10A ) ................................................................5

– Egg guide with narrow longitudinal pale pigmented area medially ( Fig. 12A ) ........... T. longilingum sp. nov.

5. Body of subgenital plate (excluding postero-lateral extension) shorter than egg guide, postero-lateral part strongly extended posteriorly ( Fig. 10A ) ....................................................................... T. magnolingum sp. nov.

– Body of subgenital plate longer than egg guide, postero-lateral part weakly extended posteriorly ( Fig. 7A ) ........................................................................................................ T. desolatum (Chapman)

6. Hypandrial right process shorter than or almost equal in length to left process ( Fig. 6C ) .............................8

– Hypandrial right process longer than left process ( Fig. 8E ) ..................................................................... 7

7. Hypandrial right process conical; hypandrial median tongue constricted medially, apical margin clearly bilobed ( Fig. 8E )..................................................................................................... T. magnolingum sp. nov.

– Hypandrial right process lamellate; hypandrial median tongue almost parallel sided, apical margin almost straight ( Fig. 13B )............................................................................................. T. carinatum sp. nov.

8. Apex of hypandrial median tongue with sharp triangular notch medially ( Fig. 6C ) .................................... 10

– Apex of hypandrial median tongue with dull hollow ( Figs 11B , 13E )......................................................... 9

9. Hypandrial median tongue long and narrow, more than 4¥ longer than basal width ( Fig. 11 ) ......................... ................................................................................................................... T. longilingum sp. nov.

– Hypandrial median tongue short and broad, less than 3¥ longer than basal width ( Fig. 13E ) ......................... ......................................................................................................................... T. tuitense sp. nov.

10. Apex of hypandrial median tongue broad, clearly bilobed ( Fig. 6C )..........................................................11

– Apex of hypandrial median tongue narrow, almost pointed, with small notch medially ( Fig. 8B )...................... .................................................................................................................. T. acutolingum sp. nov.

11. Epiproct lobe long, as long as or longer than basal width ( Fig. 6B ) .........................................................12

– Epiproct lobe short, shorter than basal width ( Fig. 14D )............................................ T. latipenne sp. nov.

12. Hypandrial median tongue constricted medially ( Fig. 14B ) .......................................... T. sparsum sp. nov.

– Hypandrial median tongue parallel sided or gradually narrowing apically ( Fig. 6C ) .... T. desolatum (Chapman)

Abdomen. White, with sparse blackish brown spots. Terminalia. Clunial arm long and broad, distal end straight with short triangular extension dorsally. Epiproct lobe ( Fig. 8A ) long and broad, slightly shorter than basal width, gradually narrowing to rounded dorsal margin. Hypandrium ( Fig. 8B ): left process conical, strongly projected posteriorly, slightly curved; right process triangular, dorsally with longitudinal trench; median tongue with broad base, then narrowing to basal fourth, almost parallel sided from basal quarter to distal one-sixth then strongly narrowing to apex, tip with small notch. Phallosome ( Fig. 8C ): pseudoparameres short and broad, expanded laterally, broadly separated. Phallobase narrowing anteriorly, with truncated anterior end.

Length. B 3.2; FW 5.8; HW 4.4.

Female. Colour and general morphology almost as in male; eye IO/D = 2.6. Genitalia: Egg guide of subgenital plate broad ( Fig. 9A ), apically rounded, broader than length, body of subgenital plate with slightly hollowed anterior margin and with rather broad and shallow median membranous notch. Internal plate as in Figure 9B .

Length. B 3.7; FW 4.8–5.0; HW 3.6–3.7.

Distribution: Mexico.

Figures

Figure 5. Forewings of Trichadenotecnum desolatum (A), T. acutolingum (B), T. magnolingum (C), T. longilingum (D), T. carinatum (E), T. tuitense (F), T. sparsum (G) and T. latipenne (H).

Figure 6. Male terminalia structures of Trichadenotecnum desolatum, showing terminalia in lateral view (A), epiproct in posterior view (B), hypandrium in ventral view (C) and phallosome in ventral view (D).

Figure 7. Female genitalia of Trichadenotecnum desolatum, showing subgenital plate (A), gonapophyses (B) and internal plate (C) in ventral view.

Figure 8. Male genitalia of Trichadenotecnum acutolingum (A–C) and T. magnolingum (D–F), showing epiproct in posterior view (A, D), hypandrium in ventral view (B, E) and phallosome in ventral view (C, F).

Figure 9. Female genitalia of Trichadenotecnum acutolingum, showing subgenital plate (A) and internal plate (B) in ventral view.

Figure 10. Female genitalia of Trichadenotecnum magnolingum, showing subgenital plate (A) and internal plate (B) in ventral view.

Figure 11. Male genitalia of Trichadenotecnum longilingum, showing epiproct in posterior view (A), hypandrium in ventral view (B) and phallosome in ventral view (C).

Figure 12. Female genitalia of Trichadenotecnum longilingum, showing subgenital plate (A) and internal plate (B) in ventral view.

Figure 13. Male genitalia of Trichadenotecnum carinatum (A–C) and T. tuitense (D–F), showing epiproct in posterior view (A, D), hypandrium in ventral view (B, E) and phallosome in ventral view (C, F).

Figure 14. Male genitalia of Trichadenotecnum sparsum (A–C) and T. latipenne (D–F), showing epiproct in posterior view (A, D), hypandrium in ventral view (B, E) and phallosome in ventral view (C, F).

Figure 15. Female genitalia of Trichadenotecnum latipenne, showing subgenital plate (A) and internal plate (B) in ventral view.