https://pubmed.ncbi.nlm.nih.gov/126805/
Fine structure of the spermatheca of the mealworm beetle (Tenebrio molitor L.)
The spermatheca of the female mealworm beetle is an inflorescence of branching cuticular ducts which is connected to the bursa copulatrix via a cuticular neck...
fine structureof thetenebrio molitormealwormbeetle