Journal ArticleMotmotnirmus danielalfonsoi n. sp., a new species of chewing louse from a turquoise-browed motmot (Eumomota superciliosa), with notes on Motmotnirmus guatemalensisGustafsson, Daniel; Bush, SarahRESUMEN. - We describe a new species of chewing louse, Motmotnirmus danielalfonsoi n. sp., from the Turquoise-Browed Motmot (Eumomota superciliosa). It differs from congeneric species in several characters, including the head shape, the abdominal chaetotaxy of the male, and in the characters of the male genitalia. Females differ from congeneric species primarily in the head shape and the shape and size of abdominal plates. Additionally, we suggest that the true host of Motmotnirmus guatemalensis is the Lesson’s Momot (Momotus lessonii), which is also a new host record. Such suggestion is based on examinations of museum specimens of lice from various motmot species. We also provide a key to the species of Motmotnirmus and an updated checklist of the genus Motmotnirmus.Revista Chilena de Ornithologia2024-01-0110565659Revista Chilena de Ornithologia29119-1260719-7853https://doi.org/1926738National Science Foundation