- a sievelike spinning organ in certain spiders that occurs between the spinnerets
Word Origin for cribellum
Examples from the Web for cribellum
Historical Examples of cribellum
In the male the cribellum is rudimentary, and there is no calamistrum.The Common Spiders of the United States
James Henry Emerton
Cribellum, kri-bel′um, n. an accessory spinning-organ of certain spiders—also Cribrell′um:—pl.
They have in front of the usual spinnerets an additional organ, which is named the cribellum (Fig. 102, c).
By means of the calamistrum these spiders comb from the cribellum a band of loose threads which form a part of their webs.
There are two quite distinct types of regular webs made by spiders possessing a cribellum and a calamistrum.