i love these galls for an entirely morbid reason
there is the gall wasp, a parasite of oak trees
then there is the crypt keeper wasp, a parasite of the parasite
their larva eat the gall wasp larva then make it chew a hole until the tip of its head sticks out of the gall, then the adult crypt keeper wasp escapes through the head
latin name "euderus set"
named after set, the egyptian god who trapped his brother osiris in a sarcophagus and killed him