Assertion: amphisbaena's fang | /r/CapableOf | fold up against roof of mouth
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Source sentences:
text: Common characters include long, rotating solenoglyphous (pipe grooved) fangs that fold up against roof of mouth; venom travels through a closed canal (pipe groove) in teeth; most have robust bodies and triangular heads; other body morphology similar as other snakes except that in crotalines infrared receptors capable of detecting .05