The fungoid denizens of Pluto. The wings are sort of small, as they wreen't suupposed to be very effective in earth's atmosphere. I really like how it tuned out."They were pinkish things about five feet long; with crustaceous bodies bearing vast pairs of dorsal fins or membraneous wings and several sets of articulated limbs, and with a sort of convoluted ellipsoid, covered with multitudes of very short antennae, where a head would ordinarily be.... As it was, nearly all the rumours had several points in common; averring that the creatures were a sort of huge, light-red crab with many pairs of legs and with two great bat-like wings in the middle of their back..."
H.P. Lovecraft, The Whisperer In Darkness