Penis
Domestic cats have barbed penises, with about 120–150 one millimeter long backwards-pointing spines. Upon withdrawal of the penis, the spines rake the walls of the female's vagina, which is a trigger for ovulation. Lions also have barbed penises. Male felids urinate backwards by curving the tip of the glans penis backward. When male cheetahs urine-mark their territories, they stand one meter away from a tree or rock surface with the tail raised, pointing the penis either horizontally backward or 60° upward.
Spectral bat
The spectral bat is the largest bat species native to the New World and the largest carnivorous bat in the world.
The wingspan typically ranges from .
Its forearm length is .
Its body length is and its mass is .
Its wings, though large in an absolute sense, are short relative to its body size.
The wings are wide, though, creating a large surface area.
Its wingtips are rounded and almost squarish.
The thumbs are long, at .
Each of its thumbs has a large, recurved claw that is grooved, similar to those of cats.
Its back fur is reddish-brown, long, and soft, while its belly fur is shorter and paler.
The forearm is furred on the half closer to the body, but naked on the half closer to the wrist and fingers.
Its molars are narrow with W-shaped crests.
While six of its molars have three cusps, as in many mammal species, the last upper molars are reduced to two cusps; they are much smaller than the other molars.
The talonids (crushing surfaces) of the molars are small relative to their trigonids (shearing surfaces).
The upper canine teeth are well-developed.
Its dental formula is for a total of 34 teeth.
Its skull is narrow and elongated with a pronounced sagittal crest. 
Overall, its skull resembles a miniature canid or bear skull.
Its nose-leaf is large, at in length.
There is no discernible tail, but the uropatagium (tail membrane) is long and broad.
Its legs are long, and the feet are composed of slender bones; each digit has a well-developed claw. The ears are large and rounded, at long.