Systematics, ecology and phylogeny of the Anamixidae (Crustacea: Amphipoda)

medial, l-lateral, 11-lower lip, m-medial, n-oblique, o-opposite, p-distal, r-proximal, ssetae removed, t-right, U-left, v-ventral y-enlarged.Letters in quotation marks are redrawn from previous figures, the drawing using the first letter of the species name. Taxonomy Anamixidae Stebbing, 1897Diagnosis.Accessory flagellum minute, 1-2 articulate, or lacking.Pereonite 1 with lateral locking ridge.Mouthparts reduced in size and complexity, especially in terminal males.Mandible lacking molar.Inner plates of maxilliped reduced, partially to completely fused; outer plates with inner lobes reduced or absent.Coxa 1 much smaller than coxa 2. Coxae 2-4 enlarged; coxa 2 usually subequal to or dominant to coxae 3--4, coxa 3 occasionally dominant.Margins of coxae 2-4 smooth, anterior margin variously expanded, produced, or cuspate, usually with subapical setae.Gnathopod 1 reduced, vestigial, or absent; carpochelate.Gnathopod 2 greatly enlarged, carpochelate. Description.Based on transformed males: Body laterally compressed, smooth, slick and shiny.Rostrum small to large and thick; lateral cephalic lobes weak, eyes ommatidial.Antenna l slender, often partially attached to rostrum, peduncle long, article 2 often as long as 1, main flagellum sparsely articulate, accessory flagellum vestigial or absent, rarely 2-articulate.Antenna 2 slender, feeble.Mouthparts in terminal males (anamorphs) as follows: Epistome strongly produced anteriorly, front of head with midventral keel; labmm asymmetrically incised.Mouthparts except maxilliped extremely reduced, fleshy and vestigial, dominated by midventral keel.Mandibular palp vestigial, represented by setae; upper and lower lips, maxillae 1 and 2, lacking any spination or ornamentation.Maxilliped enlarged, inner plates reduced, partially or completely fused; outer plates reduced with inner lobes present or absent, when present represented by small medial process; palp 4-articulate, articles 1 and 2 with medial setae; articles 3 and 4 with multiple rows of parallel setae giving rugose appearance, palp article 4 elongate.Mouthparts in females and non-transformed males (leucomorphs) as follows: Mandibles lacking molar, raker row long, incisors broad, toothed, wavy or with only one lateral notch, palp slender, feeble, 1-or 3articulate, article 3 short, setae sparse.Labium with inner lobes discrete or fused to outer, gape moderate to absent, mandibular lobes well developed.Inner plates of maxilla 1 small, naked or sparsely setose, outer plate with 5-9 spines, palp 1or 2-articulate.Maxilla 2 feeble, inner plate broad, medial setae sparse but thick and short, spine-like outer plate much more slender and sparsely setose.Outer plates of maxillipeds moderately developed to absent, inner plates small, small and discrete or mostly fused together or vestigial, palp of maxilliped long, thin, 4-articulate.