Ornithodoros is a genus in the soft-bodied tick family, Argasidae. It is distinguished from other genera in the family by the absence of a lateral 'suture' line. Ornithodoros ticks are parasitic associates of shelter-seeking vertebrates, such as mammals, birds and reptiles.

Prior to its reclassification in 1844, the genus Ornithodoros was described under the genus Argas.

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