Leptopsyllidae

Definition

A family of fleas in the order Siphonaptera, comprising at least 30 genera and approximately 250 described species. Members are typically ectoparasites of small mammals, with many species associated with rodents and their nests. The family is distinguished from other flea families by features of chaetotaxy, genital morphology, and host associations. Leptopsyllids include both nest-dwelling forms and those that feed directly on host blood.

Etymology

From Greek leptos (thin, slender) + psylla (flea), referring to the generally slender body form characteristic of this family.

Example

Leptopsylla segnis, the European mouse flea, is a common leptopsyllid that infests house mice and rats, serving as an intermediate host for the tapeworm Hymenolepis diminuta.

Related Terms

• Siphonaptera
• Ceratophyllidae
• Pulicidae
• flea
• Ectoparasite
• chaetotaxy
• siphonapteran morphology
• rodent parasite

Usage Notes

Family-level taxon; use Leptopsyllidae for the family, Leptopsyllinae for the nominotypical subfamily when discussing subfamily rank. Distinguished from Pulicidae (contains human fleas) and Ceratophyllidae (often associated with birds and squirrels) by genitalic and setal characters. Many species are important in plague ecology as vectors or as indicators of rodent host density.