| first spermatological study in the atractotrematidae (digenea, haploporoidea): the case of atractotrema sigani, intestinal parasite of siganus lineatus. | the ultrastructural organization of the mature spermatozoon of the digenean atractotrema sigani (from siganus lineatus off new caledonia) was investigated by transmission electron microscopy. the male gamete of a. sigani exhibits the general morphology described in digeneans with the presence of two axonemes of different lengths showing the 9 + "1" pattern of the trepaxonemata, a nucleus, two mitochondria, two bundles of parallel cortical microtubules, external ornamentation, spine-like bodies a ... | 2015 | 26475645 |