Complex sentence: In past classifications, they have been placed in the subfamily (Cassidinae), known collectively as "tortoise beetles"; when it was recognized that this group was not monophyletic, it was split and the resulting tribes were incorporated into the Hispinae.
Split into simpler sentences: In past classifications, they have been placed in the subfamily Cassidinae, known collectively as "tortoise beetles". When it was recognized that this group was not monophyletic, it was split and the resulting tribes were incorporated into the Hispinae.