Trogiomorpha

Trogiomorpha is one of the three major suborders of barklice, booklice, and parasitic lice in the order Psocodea (formerly Psocoptera), alongside Troctomorpha and Psocomorpha. There are about 8 families and more than 430 described species in Trogiomorpha. Trogiomorpha is widely agreed to be the earliest diverging of the three suborders, and retains the most primitive characteristics.

Internal phylogeny
The cladogram below shows the position of Trogiomorpha within Psocodea:

Classification
Trogiomorpha contains 3 infraorders and 5 extant (living) families, as well as three identified extinct families:
 * Atropetae
 * Archaeatropidae Baz & Ortuño, 2000
 * Empheriidae Baz & Ortuño, 2000
 * Lepidopsocidae Enderlein, 1903 (scaly-winged barklice)
 * Psoquillidae Lienhard & Smithers, 2002 (bird nest barklice)
 * Trogiidae Roesler, 1944 (granary booklice)
 * Psyllipsocetae
 * Psyllipsocidae Lienhard & Smithers, 2002 (cave barklice)
 * Prionoglaridetae (paraphyletic)
 * Prionoglarididae Azar, Huang & Nel, 2017 (large-winged psocids)
 * Unplaced:
 * Cormopsocidae Yoshizawa & Lienhard, 2020
 * Cormopsocidae Yoshizawa & Lienhard, 2020