THERYA, 2019, Vol. 10 (3): XXX-XXX DOI: 10.12933/therya-19-885 ISSN 2007-3364 Siphonaptera associated with small mammals (Didelphimorphia, Chiroptera, and Rodentia) from northwestern Argentina M. FERNANDA LÓPEZ-BERRIZBEITIA1, 2, 3 AND M. MÓNICA DIAZ 1, 2, 3* 1 Programa de Investigaciones de Biodiversidad Argentina (PIDBA), Programa de Conservación de los Murciélagos de Argentina (PCMA), Facultad de Ciencias Naturales e Instituto Miguel Lillo, Universidad Nacional de Tucumán, Miguel Lillo 205, San Miguel de Tucumán, CP 4000, Argentina. E-mail:
[email protected] (MFLB),
[email protected] (MMD) 2 Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Tucumán, Argentina. 3 Fundación Miguel Lillo, Tucumán, Argentina *Corresponding author Northwestern Argentina (NOA) is one of the least studied areas in Argentina with respect to ectoparasites of the order Siphonaptera; previ- ous investigations, until this study, were scarce and specific. The objective of this study was to contribute to the knowledge of the diversity of siphonaptera that parasitize small mammals from the NOA, emphasizing in their systematics and distribution. Specimens of fleas collected in several localities of NOA, and stored in the “Annexes” of the Colección Mamíferos Lillo, Universidad Nacional de Tucuman, Argentina, were studied. Fleas were manually removed from the host pelage, fixed in alcohol 70 % and prepared following conventional techniques for later observation under microscope. For specimen identification, the original descriptions of species and subspecies were reviewed and compared with specimens stored in systematic collections. Nine families, 22 genera, 53 species, and eight subspecies were recorded. A new family, a new genus, and three new species are recorded for the first time in Argentina; five species are new for NOA and nine are new to science.