Baikalogammaridae Kamaltynov, 2001

Type genus. Baikalogammarus Stebbing, 1899 b.

Diagnostic description. Body laterally compressed. Eyes well developed, reniform. Antennae 1–2 calceoli absent. Antenna 1 longer than antenna 2; peduncular article 1 subequal to article 2; article 2 subequal to or slightly longer than article 3; article 3 slightly shorter than article 1; peduncular articles 1–2 not geniculate; accessory flagellum minute. Antenna 2 peduncular article 1 enlarged, bulbous. Mandible molar [unknown]; palp symmetrical. Maxilla 1 and 2 [not known]. Coxal gills on pereopods 2–7, not stalked; sternal gills absent; sternal blisters absent; oostegites fringing setae simple. Gnathopod subchelate; 1 dissimilar in males and females (sexually dimorphic); smaller (or weaker) than gnathopod 2 or similar in size to gnathopod 2. Gnathopod 2 subchelate; dissimilar in males and females (sexually dimorphic); carpus not produced along posterior margin of propodus, projecting between merus and propodus. Pereopods 3–4 not sexually dimorphic. Pereopod 4 with well developed posteroventral lobe. Pleonites 1–3 without dorsal carinae. Urosomites 1–3 free; with slender or robust dorsal setae. Uropod 3 not sexually dimorphic; biramous, with plumose setae; endopod shorter than exopod. Telson deeply cleft or moderately cleft; dorsal or lateral robust setae absent; apical robust setae absent.

Habitat. Freshwater, epigean.

Included genera. Baikalogammarus Stebbing, 1899 b.

Distribution. Lake Baikal.