A genus of soft ticks (family Argasidae), several species of which are vectors of pathogens of various relapsing fevers. They are characterized by a capitulum hidden below the hood and by discs and mammillae of the integument that are continuous from dorsal to ventral surfaces in a variety of patterns.
[G. ornis (ornith-), bird, + doros, a leather bag]
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Examples: glitazone, GI cocktail, etc.