Crymostygiidae Kristjánsson & Svavarsson, 2004, Kristjansson & Svavarsson, 2004

Myers, A, 2013, A Phylogeny and Classification of the Senticaudata subord. nov. (Crustacea: Amphipoda), Zootaxa 3610 (1), pp. 1-80 : 44

Crymostygiidae Kristjánsson & Svavarsson, 2004

Crymostygidae (sic) Kristjánsson & Svavarsson, 2004: 188.

Type genus. Crymostygius Kristjánsson & Svavarsson, 2004 .

Diagnostic description. Body subcylindrical. Eyes poorly developed. Antennae 1–2 calceoli absent. Antenna 1 slightly longer than antenna 2; peduncular article 1 slightly longer than article 2; article 2 longer than article 3; article 3 shorter than article 1; peduncular articles 1–2 not geniculate; accessory flagellum short or minute. Antenna 2 peduncular article 1 enlarged, bulbous. Mandible molar triturating; palp symmetrical. Maxilla 1 basal endite setose along medial margin; palps symmetrical. Maxilla 2 basal endite without oblique setal row. Labium inner lobes vestigial or absent. Coxal gills number and sequence [not known], stalked (with proximal restriction or complete suture) or stalked (without proximal restriction); sternal gills present, simple; sternal blisters absent; oostegites fringing setae simple. Gnathopod 1 subchelate; similar in size to gnathopod 2; propodus palm with row or rows of simple or bifid robust setae along palmar margin. Gnathopod 2 subchelate; carpus not produced along posterior margin of propodus, projecting between merus and propodus. Pereopods 3–4 not sexually dimorphic. Pereopod 4 without posteroventral lobe. Pereopod 5 shorter than pereopod 6; coxa with small anteroventral lobe. Pereopod 7 longer than pereopod 5. Pleonites 1–3 without dorsal carinae. Urosomites 1–3 free; with slender or robust dorsal setae. Urosomite 1 without large distoventral robust seta. Urosomite 2 without dorsal setae. Uropod 1 without basofacial robust setae. Uropod 3 biramous, without plumose setae; endopod minute. Telson entire ; dorsal or lateral robust setae absent; apical robust setae present.

Habitat. Freshwater, hypogean.

Included genera. Crymostygius Kristjánsson & Svavarsson, 2004 .

Distribution. Iceland.