A genus of inornate hard ticks (family Ixodidae) consisting of about 50 species, all of which are Old World except Rhipicephalus sanguineus. Eyes and festoons are present in both sexes; short palpi and ventral plates are present only in the male. The genus includes important vectors of disease in humans and domestic animals.
[G. rhipis, fan, + kephale, head]
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Examples: glitazone, GI cocktail, etc.