Via Brazilian myrmecologist Rodrigo Feitosa comes this shot of conjoined leafcutter ant sisters. Two fully grown adult ants dorsally fused from abdominal segments 3 onward.
Incredibly, this developmental oddity was observed carrying leaf fragments in a foraging trail. It’s not as if being a two-headed monster impeded the myrmidon work ethic.
In its normal state, the species looks like this: