Parameres (`side parts`) are part of the external reproductive organs of male insects and the term was first used by Verhoeff in 1893 for the lateral genital lobes in Coleoptera. The primary phallic lobes which appear in the nymph or larval stages may become a pair of penes in the Ephemeroptera or a simple median penis in the Thysanura. In highe.....
• (n.) One of the symmetrical halves of any one of the radii, or spheromeres, of a radiate animal, as a starfish.
Copulatory appendage in male cimicid bugs.
Par'a·mere noun [ Prefix para- + -mere .] (Zoology) One of the symmetrical halves of any one of the radii, or spheromeres, of a radiate animal, as a starfish. 
Copulatory hooks formed from outer subdivision of primary phallic lobes.