The egg of Schizotaenia americana (Stiles) a porcupine tapeworm The egg of Schizotaenia americana (Stiles) a porcupine tapewormv. 9No. 1American Society of Parasitologists47Hadwen, Seymour. 1922. "The egg of Schizotaenia americana (Stiles) a porcupine tapeworm." The Journal of Parasitology, 9, (1) 47.More...ID: 123918Type: articleKeywords: USNM; NMNH