A taxonomic review of the Leucothoidae (Crustacea: Amphipoda) 3078 Author White, Kristine N. text Zootaxa 2011 2011-10-28 3078 1 1 113 https://biotaxa.org/Zootaxa/article/view/zootaxa.3078.1.1 journal article 10.11646/zootaxa.3078.1.1 1175­5334 5243821 Leucothoidae Dana, 1852 Diagnosis. Body laterally compressed, cuticle smooth. Pereonite 1 with lateral locking-ridge in anamixid clade. Accessory flagellum minute, 1–2 articulate or lacking. Maxilliped outer plates small; palp four articulate. Mouthparts well developed in leucothoid clade: Mandibular palp three articulate, molar absent. Maxilla 1 palp one or two articulate. Mouthparts greatly reduced in anamixid clade. Gnathopod 1 carpochelate, sometimes absent in the anamixid clade. Gnathopod 2 carpochelate. Pereopods 5–7 bases usually expanded. Urosomites free. Telson entire. Leucothoid clade with little to moderate sexual dimorphism. Anamixid clade with extreme sexual dimorphism.