Taxonomy: f. Hymenolepididae
Animal: Hymenolepis nana 12 02.jpg
Hymenolepis nana abnormally developed metacestode from the haemocoele of a cat flea (Ctenocephalides felis felis) adult reared at 32C/3mmHg, 9 days after ingestion of eggs by the larval stage of the flea (development of the parasite was complete after 6 days at this temperature, faster than at lower temperatures but there were more abnormal forms like this one ie. lacking a cercomer, unusual shaped suckers and/or lacking a rostellum). H. nana adult is seen in the intestine of humans but more usually the normal host the rat (no intermediate host is required, but the cat flea can act as the intermediate host). (s- sucker) (Pugh 1985 PhD thesis - see bibliography).
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