"Belkin et al. (1970) determined that the "indubitans" of the Caribbean area are different from those in South America; therefore, a new species was described, Mansonia dyari Belkin, Heineman & Page. Knight & Stone (1977) do not list Mansonia indubitans from Argentina. Ronderos & Bachmann (1963) believed that all records of Mansonia pessaoi for Argentina are referable to indubitans. These records include: Buenos Aires: Baradero, X-26-47; Castro & García 1959 (1960); Castro et al. 1959 (1960). Chaco: General Obligado, IV-50; Duret 1951a. Entre Ríos: Ibicuycito, III-2-38; Castillo leg., Brazo Largo, II-2-40, I-15-49, ii-20-49,XII-51; Mazaruca, I-41; Castro & García 1959 (1960); Castro et al. 1959 (1960). Santa Fe, II-10-41; Bacigalupo leg., Villa Guillermina, I-5-52; Castro & García 1959 (1960); Castro et al. 1959 (1960). Knight & Stone (1977) recorded Mansonia pessaoi only from Brazil." (Mitchell & Darsie, 1985).
Larva and pupa unknown.
Disease relations: Se ha aislado el virus Encefalitis Equina del Oeste de especímenes identificados como Mansonia spp, en la provincia de Santa Fe entre 1982 y 1983 (Sabattini et al., 1998).
Eggs usually adhere to aquatic plants and larvae get air from them. Adults are large, aggressive biters and mostly zoophilic, but opportunistic in their preferences. Females were captured with a CDC light trap baited with CO22 in a peri-urban area belonging to the Yungas premontane forest (Apumaita et al., 2023).