Anatomy 101 of IXODID ticks

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Palps--movable appendages anterior and lateral to basis capituli and overlying hypostome and chelicerae dorsolaterally

they swing open laterally upon insertion of hypostome for feedings

Festoons--grooved rectangular structures at posterior margin of idiosoma present in all common genera except Ixodes

Anal Groove--curvilinear indentation of caudal ventral surface, nearly circumscribing anus; located posterior to anus in all genera but Ixodes