Fig. 11

Cross sections through the posterior body of G. impar n. sp. a anterior region of the gonads with oocytes; b posterior region of the gonads with spermatozoa; c paired spawning duct; d fusion of the spawning ducts; e–f unpaired spawning duct; g–h anterior region of the pallial cavity with the ventral opening of the genital orifice; i detail of the posterior region of the pallial cavity with respiratory folds. au auricle, dk middorsal keel, dso dorsoterminal sense organ, go gonad, mg midgut, og genital orifice, pa pallial cavity, pc pericardium, pd pericardioduct, psd paired spawning duct, re rectum, rf respiratory fold, sc suprarectal commissure, sr seminal receptacle, usd unpaired spawning duct