PSOCOMORPHA, Roesler, 1944

Yoshizawa, Kazunori, 2002, Phylogeny and higher classification of suborder Psocomorpha (Insecta: Psocodea: ‘ Psocoptera’), Zoological Journal of the Linnean Society 136 (3), pp. 371-400 : 394

SUBORDER PSOCOMORPHA

Head usually with rounded vertex; antennae 13- segmented; flagellomeres never annulated; maxilla without stipito-galeal muscle; hypopharyngeal filaments fused for most of their length; labial palpus 1-segmented. Forewing with nodus and thickened pterostigma; nodulus hook-shaped, formed by truncated spines fused at their base; CuP ending together with A 1 at wing margin. Apex of first axillary sclerite usually with minute proximal process. Subgenital plate lacking median sclerite.