Two new species of amphipod genus Stenothoe Dana, 1852 (Stenothoidae) associated with fouling assemblages from Nhatrang Bay, Vietnam Author Marin, Ivan Author Sinelnikov, Sergey text Zootaxa 2018 2018-04-16 4410 1 57 76 journal article 30256 10.11646/zootaxa.4410.1.3 e7a99a36-5a78-416e-b9c6-ece342cc0079 1175-5326 1221236 C3C45A46-3761-4074-BC03-6A3432FDF1F7 Genus Stenothoe Dana, 1852 Diagnosis. (after Krapp-Schickel 2009 with some modifications). Body smooth and shiny, compact, rarely slender. Head narrow, truncated at the front. Coxal plates generally small in size, coxal plate II conceal oral area, with rounded front sides, coxal plate III more or less extended distally and transversely truncated at the end of coxal plate IV. Mandible without palp. Maxilla I with reduced inner plate, with 2-segmented palp. Maxilla II with reduced inner plate, with 2-segmented or fused to outer plate. Maxilliped with very small and narrow inner plates clearly separated into its base, with completely reduced outer plates, palps elongated and 4-articulated, distal articles form a “claw”. Palmar region of gnathopods II with long setose setae on the edge, expanded, palm oblique, carpus shorter than propodus. Gnathopods II large, differing in males and females, meral joint triangularly produced downwards. Peraeopod IV with expanded coxal plates (indication of the family Stenothoidae ) sometimes at the lower edge of which may be located short spikes; peraeopod V with rectolinear basis; peraeopods VI–VII with expanded basis and merus. Uropods elongated and setose on the upper surface. Uropod III uniramous. Telson entire, oval or elongated shape, sometimes fitted with teeth or smaller robust setae.