a flattened sievelike plate in front of the spinnerets, through it the calamistrum, a row a curved setae on the next to last segment of the fourth leg, pulls silk; used as a characteristic for identification purposes
Sievelike spinning plate in front of the spinnerets.
A cribellum is a kind of comb-like device in certain spiders, used to separate fibers of silk drawn from its spinnerets into many extremely fine fibers, giving it a wooly structure. Those fibers are so small in diameter that prey insects easily become entangled in them, without any glue needed. The spiders then bite them before they can get away.