Gammarus minus
From the collection of Yale Peabody Museum. Free to download, adapt and use — no permission needed.
Collection locality: Stream exiting Foshee Cave, Independence County, Arkansas, USA. Collected by McAllister, C. T., 2012-04-26. CSBR Slide Grant Image 2015; IZ number 58931; lot count 1; Microslide 01, balsam, antenna 1; Microslide 01, balsam, antenna 2; Microslide 01, balsam, mouthparts; Microslide 01, balsam, uropod 1; Microslide 01, balsam, uropod 2; Microslide 01, balsam, uropod 3; Microslide 02, balsam, gnathopod 1; Microslide 02, balsam, gnathopod 2; Microslide 02, balsam, pereopod 3; Microslide 02, balsam, pereopod 4; Microslide 02, balsam, pereopod 5; Microslide 02, balsam, pereopod 6; Microslide 02, balsam, pereopod 7; accn=YPM.11731.
Yale Peabody Museum’s own description