New record of Alectopsylla unisetosa (Siphonaptera: Ischnopsyllidae) from Patagonia

Alectopsylla unisetosa (Ischnopsyllidae) from Santa Cruz province represents the second report of the species after 45 years. This new distributional record extends this species distribution 1350 km further south than previously documented. Moreover, Alectopsylla unisetosa infesting Myotis chiloensis constitutes a new flea–host association. This finding provides new insights into the biogeography and host associations within the family Ischnopsyllidae. •Alectopsylla unisetosa is recorded for the second time after 45 years.•The paper provides images with the diagnostic characters of specimens male and female.•This finding provides new insights into the biogeography and host associations within the family Ischnopsyllidae.