A specialized spinning organ in certain spiders that produces fine, comb-like silk used to capture prey.
From Latin 'cribellum,' diminutive of 'cribrum' meaning sieve, named for its sieve-like appearance and function in producing fine silk.
Spiders with cribellums have an evolutionary advantage—their special combed silk is so effective at catching flying insects that some spider families went extinct because they couldn't compete.
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