Fig. 4 Braula coeca ventral receptacle, fresh dissection. a Median focal plane. b in Setting the records straight II: "single spermatheca" of Braula coeca (Diptera: Braulidae) is really the ventral receptacle

Fig. 4 Braula coeca ventral receptacle, fresh dissection. a Median focal plane. b Inner wall with cuticular ridges reconstructed by stacking serval focal plains. cr cuticular ridges, ep epithelium, iw inner wall, mu muscle layer, ow outer wall, sp spermatozoa. Bar: 20 μm