Cryptosporidium, a parasitic protozoan...Intestinal coccidiosis of anadromous and landlocked alewives, Alosa pseudoharengus, caused by Goussia ameliae n. sp. and G. alosii n. sp. (Apicomplexa: Eimeriidae)August 2015Jan Lovy | Sarah E. FriendAnadromous alewives, Alosa pseudoharengus, have experienced significant population level declines caused by factors including habitat destruction.