Fig. 2
From: 3D printed spermathecae as experimental models to understand sperm dynamics in leaf beetles
Scanning electron micrographs of spermathecae. The white arrowheads point to the openings of the spermathecal gland, and the black arrowheads denote the openings of the spermathecal duct. Dashed lines encircle muscles. aCassida vibex. bAgelastica alni. cGastrophysa viridula. dDonacia crassipes. eCrioceris duodecimpunctata. fCr. asparagi