Minute but constant morphological differences within members of Stenothoidae: the Stenothoe gallensis group with four new members, keys to Stenothoe worldwide, a new species of Parametopa and Sudanea n. gen. (Crustacea: Amphipoda). Journal of Natural History, 49(37-38), Oct 10 2015: 2309-2377. 2369 [Zoological Record Volume 151]