Cyrtomaia micronesica is different than its closest relative (Cyrtomaia cornuta from New Caledonia) by shorter basal antennal spines, longer chelipeds, varied male meri and pleopod and a varied carapace.    From Wordnik.com.  [Archive 2007-02-01] Reference

This is a composite image of the 1st pair of pleopods and the outer branch (exopodite) of the right (animal's left) pair that came apart during the removal operation (each pleopod has an outer and an inner branch).    From Wordnik.com.  [Penis of an isopod] Reference