title: Gonadal development and sex determination in pulmonate molluscs. I. Arion circumscriptus.
mesh_terms: D000818:Animals; D002454:Cell Differentiation; D004475:Ectoderm / Q000166:cytology; D005260:Female; D006066:Gonads / Q000166:cytology / Q000196:embryology / Q000254:growth & development; D008027:Light; D008297:Male; D008854:Microscopy, Electron; D010063:Ovum; D012708:Sertoli Cells; D012732:Sex Determination Analysis; D012908:Snails / Q000166:cytology / Q000196:embryology / Q000254:growth & development*; D013094:Spermatozoa; D013696:Temperature