Abstract
The genus Quadraseta Brennan, 1970 (Trombiculidae) is distributed in South American, with a few records from Central America. The larvae (chiggers) are primarily mammal parasites, with one species from birds. Examination of unidentified material at US National Insect and Mite Collection revealed five species to this genus: Q. brasiliensis Goff & Gettinger, 1989, Q. falconensis Goff & Brennan, 1977, Q. flochi (Brennan & Jones, 1960), Q. mackenziei (Yunker & Brennan 1964), and Q. mirandae Goff & Brennan, 1977. This study resulted in new South American localities and host records for these species.
Highlights
The genus Quadraseta Brennan, 1970 (Trombiculidae) is distributed in South American, with a few records from Central America
Examination of unidentified material deposited at the US National Insect and Mite Collection, Smithsonian Institution, National Museum of Natural History, Washington, DC, USA (USNM), currently located at the Systematic Entomology Laboratory (BARC-USDA-ARS), Beltsville, MD, USA, revealed five species of Quadraseta: Q. brasiliensis Goff & Gettinger, 1989, Q. falconensis Goff & Brennan, 1977, Q. flochi (Brennan & Jones, 1960), Q. mackenziei (Yunker & Brennan, 1964), and Q. mirandae Goff & Brennan, 1977
No types were available for Quadraseta brasiliensis so we compared our specimens with previously identified material deposited at the USNM and the original description by Goff & Gettinger (1989)
Summary
The genus Quadraseta Brennan, 1970 (Trombiculidae) is distributed in South American, with a few records from Central America. Examination of unidentified material deposited at the US National Insect and Mite Collection, Smithsonian Institution, National Museum of Natural History, Washington, DC, USA (USNM), currently located at the Systematic Entomology Laboratory (BARC-USDA-ARS), Beltsville, MD, USA, revealed five species of Quadraseta: Q. brasiliensis Goff & Gettinger, 1989, Q. falconensis Goff & Brennan, 1977, Q. flochi (Brennan & Jones, 1960), Q. mackenziei (Yunker & Brennan, 1964), and Q. mirandae Goff & Brennan, 1977. Beyond to the localities mentioned above, Jacinavicius et al (2018a) recorded Q. brasiliensis from Itapevi Municipality, São Paulo State, on the marsupial Monodelphis sp., and the Brazilian common opossum, Didelphis aurita (Wied-Neuwied, 1826) (Didelphimorphia: Didelphidae).
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