Macrohectopidae Sowinsky, 1915

Type genus. Macrohectopus Stebbing, 1906 .

Diagnostic description. Eyes well developed, ovoid or reniform. Antenna 1 subequal in length to antenna 2; peduncular article 1 shorter than article 2; article 2 shorter than article 3; article 3 longer than article 1; peduncular articles 1–2 not geniculate. Antennae 1–2 calceoli absent. Antenna 2 peduncular article 1 not enlarged. Mandible molar present; palp symmetrical. Maxilla 1 basal endite [not known]; palps symmetrical. Maxilla 2 [not known]. Coxal gills [not known]; sternal gills absent; sternal blisters absent; oostegites fringing setae simple. Gnathopod 1 subchelate; dissimilar in males and females (sexually dimorphic); similar in size to gnathopod 2. Gnathopod 2 subchelate; dissimilar in males and females (sexually dimorphic); carpus slightly produced along posterior margin of propodus. Pereopods 3–4 not sexually dimorphic. Pereopod 4 without posteroventral lobe. Pereopod 5 shorter than pereopod 6; coxa with large anteroventral lobe. Pereopod 7 longer than or much longer that pereopod 5. Urosomites 1–3 free; without 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, with plumose setae; endopod subequal in length to exopod. Telson moderately cleft .

Habitat. Freshwater, pelagic planktivores.

Included genera. Macrohectopus Stebbing, 1906 .

Remarks. Based on molecular evidence Macdonald et al. (2005) consider the macrohectopids to be a divergent part of the Micruropodidae .

Distribution. Lake Baikal.