Cryptopters
These are bats, related to the pteropods that completely lost
their wings. They inhabit what is today the Hawaiian Islands,
and fill several open ecological niches, including the ones
that ungulates occupy on the mainlands. In these species,
the 3rd and 4th digits have either become fused together
with the index finger for a powerful grasp, or have
disappeared completely. The main predator of these bats are
the eagle-like Cercomoloch.
Acronurus
A monkey-like bat that lives in the trees. They
leap like we see in modern lemurs. The diet
consists of leaves, fruit, berries, insects,
smaller bats and grubs. The tail is long but
not prehensile. The hands and feet are all
opposable and very powerful to grip
branches and tree stumps for leaping.
Arbovespertilio
A sloth-like bat that moves slowly with a
hand-over-hand motion. They feed
exclusively on fruit, flowers and leaves.
They mostly hang upside down either by all
fours or by either their hands or feet. They
almost never need to descend to the
ground.
Cryptopterus
This is the only truly ground-dwelling species
in this family. They have completely lost most
of their fingers, to give them a streamlined,
almost hoof-like foot. This makes it possible
for this animal to make a quick get-away in
case it senses a predator is near. The claws
on the feet are for self defense, as when they
are cornered, they can swat them at the
attacker.
Pitheconycteris
Like it's close cousin, Acronurus, this animal
has fused fingers with only the thumb free.
The arms are disproportionately long, like a
gibbon's, and allows this animal to brachiate
through the trees very quickly. These animals
feed on fruit, leaves, insects, and small
vertebrates.