Article · Wikipedia archive · Last revised Jul 1, 2026

Trogiomorpha

Trogiomorpha is one of the three major suborders of barklice, booklice, and parasitic lice in the order Psocodea, alongside Troctomorpha and Psocomorpha. There are about eight 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.

Last revised
Jul 1, 2026
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≈ 2 min
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Wikipedia ↗
Trogiomorpha
Temporal range:
Dorypteryx domestica
Scientific classification Edit this classification
Kingdom: Animalia
Phylum: Arthropoda
Clade: Pancrustacea
Class: Insecta
Order: Psocodea
Suborder: Trogiomorpha
Roesler, 1940
Infraorders1

See text

Trogiomorpha is one of the three major suborders of barklice, booklice, and parasitic lice in the order Psocodea (formerly Psocoptera),23 alongside Troctomorpha and Psocomorpha. There are about eight families and more than 430 described species in Trogiomorpha.456 Trogiomorpha is widely agreed to be the earliest diverging of the three suborders, and retains the most primitive characteristics.7

Trogium pulsatorium source ↗

Internal phylogeny

The cladogram below shows the position of Trogiomorpha within Psocodea:1

Psocodea

Characteristics

Species of Trogiomorpha possess antennae that are split into 20 or more separate pieces.8 The tarsi are segmented into three separate equal pieces, and they have a strong posterior spine. They have been described as having a "mothlike" (brown) appearance in color.8

Classification

Trogiomorpha contains three infraorders and five extant (living) families, as well as three identified extinct families:

References

References

  1. de Moya, Robert S; Yoshizawa, Kazunori; Walden, Kimberly K O; Sweet, Andrew D; Dietrich, Christopher H; Kevin P, Johnson (2021-06-16). Buckley, Thomas (ed.). "Phylogenomics of Parasitic and Nonparasitic Lice (Insecta: Psocodea): Combining Sequence Data and Exploring Compositional Bias Solutions in Next Generation Data Sets". Systematic Biology. 70 (4): 719–738. doi:10.1093/sysbio/syaa075. ISSN 1063-5157. PMID 32979270.
  2. Johnson, Kevin P.; Smith, Vincent S. (2019). "Psocodea Species File Online". Retrieved 2019-06-14.
  3. Bess, Emilie; Smith, Vince; Lienhard, Charles; Johnson, Kevin P. (2006). "Psocodea". Tree of Life. Retrieved 2019-06-14.
  4. "Trogiomorpha Report". Integrated Taxonomic Information System. Retrieved 2019-05-04.
  5. Johnson, Kevin P.; Smith, Vincent S. (2019). "suborder Trogiomorpha". Psocodea species file online, Version 5.0. Retrieved 2019-05-04.
  6. Yoshizawa, Kazunori; Lienhard, Charles (June 2020). "†Cormopsocidae: A new family of the suborder Trogiomorpha (Insecta: Psocodea) from Burmese amber". Entomological Science. 23 (2): 208–215. doi:10.1111/ens.12414. ISSN 1343-8786.
  7. Gillott, Cedric (1995). Entomology (2nd ed.). Dordrecht: Springer Netherlands. p. 197. ISBN 978-94-017-4380-8.
Further reading

Further reading