Stephonyx californiensis sp nov (Amphipoda: Lysianassoidea: Uristidae), a new bathyal scavenger species from the Central Gulf of California, Mexico, and comments on the bathymetric and geographic distribution of the Stephonyx species group. Journal of Natural History, 51(47-48) 2017: 2793-2807. 2795 [Zoological Record Volume 154]