LACHESILLOIDEA, Yoshizawa, 2002

Yoshizawa, Kazunori, 2002, Phylogeny and higher classification of suborder Psocomorpha (Insecta: Psocodea: ‘ Psocoptera’), Zoological Journal of the Linnean Society 136 (3), pp. 371-400 : 396

LACHESILLOIDEA SUPERFAM. NOV.

Lachesillidae Badonnel (1951) ; emended from Pterodelidae Pearman, 1936, is the oldest family group name within the superfamily.

Small in size, about 1.5–4 mm in length. Body generally pale brown to blackish-brown. Mostly collected from dead-foliage, ground litter, bird’s nests, and from bark.

Head with rounded vertex; postclypeus less bulged; epistomal suture sometimes reduced, always without broad internal ridge; anteclypeus usually not sclerotized. Pre-episternum of prothorax elongate. Metaepimeron of Ectopsocidae with ball-shaped lobe laterally. Forewing hyaline, sometimes with blackishbrown markings; pterostigma usually shallow; areola postica, if present, usually free from M, absent in Ectopsocidae , and fused with M in some Lachesiliidae. Hindwing veins and margin glabrous; Rs and M + Cu fused for long distance basally; Rs and M fused ( Lachesillidae ) or connected by crossvein ( Ectopsocidae ). Tarsi 2- or 3- ( Eolachesilla ) segmented; claws with or without ( Ectopsocidae ) preapical tooth; pulvillus broad or narrow. Abdomen without eversible vesicles ventrally. Male genitalia: variable; clunium, epiproct, paraproct, and hypandrium often with various processes. Phallosome variable; endophallus usually with sclerites but absent in some genera of Lachesillidae . Female genitalia: subgenital plate with ( Ectopsocidae and some genera of Lachesillidae ) or without distal projection extended from dorsal margin. Dorsal and ventral valves of gonapophyses often reduced; external valve narrowed, bearing long setae.

Type genus: Lachesilla Westwood, 1840 . Included families: Lachesillidae , Ectopsocidae .