During our sampling campaign to the Mariana Trench in March 2017, individuals of amphipods in Pardaliscidae Halice sp.
Increasing common in the deep sea, species with wide distribution often turn out to be composed of cryptic species discernible by molecular taxonomy ; ;.
This study expands its known distribution to the Puerto Rico, Santa Cruz, and San Cristobal trenches, confirms its presence at the Mariana and South Sandwich trenches, and verifies that the historical records of H.