Eurycopinae, Hansen, 1916

Malyutina, Marina & Brandt, Angelika, 2006, A revaluation of the Eurycopinae (Crustacea, Isopoda, Munnopsidae) with a description of Dubinectes gen. nov. from the southern Atlantic deep sea, Zootaxa 1272 (1), pp. 1-44 : 15

Key to the genera of Eurycopinae

1 Posterior margin of pleotelson with additional structure (outer rim); uropod protopod bent at midlength with both margins angled; cuticle strongly calcified, mat, body deepest at head ............................................................................... Dubinectes gen. nov.

­ Posterior margin of pleotelson simple; uropod protopod with straight lateral margin, cuticle thin, glossy, body deepest at natasome .............................................................. 2

2 Pereonites 5 and 6 with complete dorsal articulation; antenna 1 article 1 with produced distomedial lobe, article 3 longer than article 2; epipod of maxilliped with angled lateral projection.................................................................................................. Eurycope

­ Pereonites 5 and 6 without complete dorsal articulation, antenna 1 article 1 with rather reduced distomedial lobe, article 3 shorter than article 2; epipod of maxilliped with no angled lateral projection............................................................................................... 3

3 Pereonite 6 dorsally fused with pereonite 7; rostrum without distinct margins; mandibular molar thick, condyle longer than molar; maxilliped epipod shorter than basis, tip truncated, broad ............................................................................................. Baeonectes

­ Pereonite 7 separated from pereonite 6 by dorsal suture; rostrum with lateral margins; mandibular molar narrow, condyle shorter than molar; maxilliped epipod elongate, subequal to basis, tip pointed ........................................................................................ 4

4 Pereonite 7 considerably shorter than pereonite 6; pereonites 5–7 compressed dorsally, venter of pereonite 6 bulging downwards ..................................................... Tytthocope

­ Pereonite 7 subequal to pereonite 6 in lateral length; pereonites 5–7 convex dorsally; venter of pereonite 5 bulging downwards..................................................................... 5

5 Body broad, venter of anterior part of pereonite 5 bulging downwards, labrum tiny, shorter than clypeus, uropod exopod as long or longer than endopod ....... Disconectes

­ Body elongated, venter of posterior part of pereonite 5 bulging downwards, labrum longer than clypeus, uropod exopod much smaller than endopod ................ Belonectes