Pygiopsyllidae

Definition

A family of fleas (order Siphonaptera) distinguished by the pygidium (dorsal abdominal tergites) bearing characteristic sensilla and setal patterns used in identification. Members are primarily ectoparasites of small mammals, with some species occurring on birds. The family is most diverse in the Australasian and Oriental regions.

Etymology

From Greek pygidion (small rump, diminutive of pygē rump) + Greek psylla (flea) + -idae family suffix, referring to the diagnostic pygidial morphology

Example

Species of Pygiopsyllidae such as those in the genus Pygiopsylla are commonly recovered from native Australian marsupials and rodents, making them important subjects in surveys of flea-borne pathogens like Bartonella and Rickettsia.

Related Terms

• Siphonaptera
• Pygidium
• Ctenophthalmidae
• Pulicidae
• Ectoparasite
• flea-borne disease
• sensilla

Usage Notes

The pygidial sensilla pattern is a key diagnostic feature distinguishing Pygiopsyllidae from other flea families. Formerly treated as a subfamily within more inclusive classifications; current molecular and morphological studies support family rank. Not to be confused with Pygiopsylloidea, a superfamily name sometimes used in older literature.