Suctorial

Suctorial pertains to the adaptation for sucking or suction,^[1] as possessed by marine parasites such as the Cookiecutter shark,^[2] specifically in a specialised lip organ enabling attachment to the host.

Suctorial organs of a different form are possessed by the Solifugae arachnids, enabling the climbing of smooth, vertical surfaces.^[3]

Another variation on the suctorial organ can be found as part of the glossa proboscis of Masarinae (pollen wasps), enabling nectar feeding from the deep and narrow corolla of flowers.^[4]