Conjoined... ants !!

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.

Via Myrmecos, which has LOTS of information about ants.  Photo credit: Rodrigo Feitosa.