legerella legerella legerella is a genus of parasitic alveolates of the phylum apicomplexa. species in this genus that usually infect the malpighian tubules of invertebrates. legerella scientific classification domain: eukaryota clade: diaphoretickes clade: sar clade: alveolata phylum: apicomplexa class: conoidasida order: eucoccidiorida suborder: adeleorina family: legerellidae genus: legerellamesnil, 1900 species legerella helminthorum legerella hydropori legerella nova legerella parva legerella testiculi legerella helminthorum infects the intestinal cells of the nematode mononchus composticola legerella testiculi infects the testes of the millipede glomeris marginata. the type species is legerella nova. history the genus was created by félix mesnil in 1900. taxonomy there are five species known in this genus. description the oocyst contains numerous sporozoites. sporocysts do not occur. host records l. helminthorum - nematode (mononchus composticola) l. hydropori - beetle (hydroporus palustris) l. testiculi - millipede (glomeris marginata)