Lachesilla andra

Mockford, Edward L. & García, Alfonso N., 2010, A new species of Lachesilla Westwood (Psocoptera: Lachesillidae) in the andra group with a proposed classification of the andra group, Zootaxa 2335, pp. 49-58 : 57

Key to the subgroups of the Lachesilla andra species group (males only)

1 Claspers well developed and not fused to body of hypandrium but separated from it by a distinct line or attached to it at their base by membrane (see García Aldrete, 1974, Fig. 7 ). Phallosome a single stem forked posteriorly, each tine bilobed or trilobed at its apex................................................................................................................. Subgroup I

-. Claspers, when present, completely fused to body of hypandrium with no line of separation; claspers often greatly reduced or absent (see Fig. 6 and García Aldrete, 2000, Figs. 3, 10 ). Phallosome not as above; if a single stem forked posteriorly, then each tine terminating in a spearhead-like structure; otherwise, phallosome either two rods fused only at base, or two separate rods ................................................................................................................................. 2

2 Phallosome a single stem forked in posterior half; each tine terminating in a spearhead-like structure..... Subgroup II

-. Phallosome of two separate rods, or the two rods fused only at base........................................................................... 3

3 Hypandrium extended posteriorly as two lateral lobes ( Fig. 6 ); claspers either absent or represented (?) by a small process on or near the tip of each lateral hypandrial lobe.......................................................................... Subgroup III

-. Hypandrium terminating as two rounded lobes not extending posterior to hypandrial midpoint; claspers represented by a pair of diagonal lines across hypandrium, converging at posterior hypandrial midpoint and a small cone or spike-like projection at their point of convergence.................................................................................... Subgroup IV

Figures

FIGURES 2 – 10 Lachesilla texana n. sp., male. (2) Forewing (type, north Mexico); (3) Hindwing (type); (4) Forewing (Great Smoky Mountains); (5) Pretarsal claw (type); (6) Hypandrium and phallosome (type); (7) Distal lobe of hypandrium (north Mexican paratype); (8) Paraproct and clunial articular region, Cl = clunial arm (type); (9) Epiproct (type); (10) Distal lobe of hypandrium, enlarged (Great Smoky Mountains). Scale bars = 0.1 mm unless indicated otherwise. Figs. 2, 3, and 4 to common scale; Fig. 9 to scale of Fig. 8; Fig. 10 to scale of Fig. 7.