Complex sentence: The second suborder, Eimeriorina, comprises coccidia of vertebrates as well as cyst forming coccidia including "Toxoplasma" and "Sarcocystis".
Split into simpler sentences: The second suborder, Eimeriorina, comprises coccidia of a variety of coccidia many of which are cyst forming. A number of genera infect vertebrates including "Toxoplasma" and "Sarcocystis".