title: Amoebogregarina Nigra n. gen., n. comb. (Apicomplexa: Gregarinidae) from adult Melanoplus differentialis (Orthoptera: Acrididae) in southeastern Nebraska.
abstract: Amoebogregarina nigra n. gen., nov. comb. (Eugregarinida: Gregarinidae) is described from trophozoites, gamonts, associations, gametocysts, and oocysts collected from adult Melanoplus differentialis (Orthoptera: Acrididae) in Nemaha County, Nebraska. Host alimentary canals were examined for eugregarine parasites. Gregarines encountered were fixed as permanent specimens or subjected to a series of morphometric measurements. Morphometric analysis indicated the presence of Gregarina nigra, a poorly described taxon reported from a variety of Nearetic grasshopper species, Examination of G. nigra revealed a metamorphic epimerite assimilated by the protomerite on maturity. This epimerite-protomerite complex is unique within Gregarinidae, prompting creation of the genus Amoebogregarina. Amoebogregarina nigra is the type species in new combination. Gregarina indianensis is recognized as a junior synonym of A. nigra.
authors.affiliation: Division of Science & Technology, Peru State College, Nebraska 68421, USA.
authors.forename: R R
authors.initials: RR
authors.lastname: Kula
authors.forename: R E
authors.initials: RE
authors.lastname: Clopton
mesh_terms: D000818:Animals; D016782:Apicomplexa / Q000145:classification* / Q000166:cytology / Q000302:isolation & purification; D006110:Grasshoppers / Q000469:parasitology*; D009329:Nebraska; D009626:Terminology as Topic