High Quality Content by WIKIPEDIA articles! High Quality Content by WIKIPEDIA articles! Coextinction of a species is the loss of a species as a consequence of the extinction of another. The term was originally used in the context of the extinction of parasitic insects following the loss of their specific hosts. The term is now used to describe the subsequent loss of any interacting species, including predators with their prey, and specialist herbivores with their food source. Coextinction is especially common when a keystone species goes extinct. The most often cited examples are that of the extinct passenger pigeon and its parasitic bird lice Columbicola extinctus and Campanulotes defectus. Recently, C. extinctus was rediscovered on the band-tailed pigeon, and C. defectus was found to be a likely case of misidentification of the existing Campanulotes flavus. However, even though the passenger pigeon lice story has a happy ending (i.e. rediscovery), coextinctions of other parasites, even on the passenger pigeon, may have occurred. Several louse species - such as Rallicola extinctus, a huia parasite - probably became extinct together with its hosts (Mey, 1990).

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