Philopteroides xenicus, also known as the bushwren louse, is an extinct avian parasitic louse species of the genus Philopteroides. It was known to have lived on the bushwren, so it went co-extinct with the bushwren in the mid 1900s.Rózsa, L., & Vas, Z. (2015). Co-extinct and critically co-endangered species of parasitic lice, and conservation-induced extinction: should lice be reintroduced to their hosts?. Oryx, 49(1), 107-110.
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