Linognathidae

Definition

A family of sucking lice (order Psocodea, suborder Anoplura) that are obligate ectoparasites of mammals, particularly ungulates. Members of this family are characterized by their elongated, slender bodies and are distinguished from other anopluran families by features of their mouthparts and leg structure. The family includes economically important species that infest livestock, causing irritation, blood loss, and potentially transmitting pathogens.

Etymology

Example

Linognathus vituli, the long-nosed cattle louse, is a member of Linognathidae that infests cattle worldwide and can reduce weight gain and milk production in heavy infestations.

Related Terms

• Anoplura
• Psocodea
• Phthiraptera
• Sucking lice
• Linognathus
• Haematopinus
• Solenopotes
• Ectoparasite
• Pediculosis

Usage Notes

Linognathidae is one of several families of sucking lice; it is distinguished from the families Haematopinidae (on ungulates and suids) and Pediculidae (on primates) by morphological features including the structure of the antennal flagellum and tarsal claws. The family is sometimes grouped with other ungulate lice families in discussions of veterinary parasitology. Webb (1946) is the authority for the family name.