C. bidentata may refer to:
Canna bidentata, a garden plant Caprella bidentata, a skeleton shrimp Cheirostylis bidentata, a flowering plant Chlorodiella bidentata, a crab in which the genital openings are on the sternum in females, but on the legs in males Clausilia bidentata, a door snail Clivina bidentata, a ground beetle Cordulegaster bidentata, a near threatened dragonfly Culoptila bidentata, a North American caddisfly Cyathea bidentata, a tree fern Cyrba bidentata, a jumping spider