Planche 1 issued from : E.L. Markhaseva & F.D. Ferrari in Invert. Zool., 2005, 2 (2). [p.144, Fig.19].
Female (from Eastern tropical Pacific): A-B, posterior prosome and genital complex (dorsal and lateral, respectively); C, A2 (exopod); D, Mx2 (praecoxal, coxal and proximal basal endites); E, Mx2 (sensory setae of proximal basal endite and distal basal endite + ramus); F, Mxp (syncoxa); G, P5.
Scale bars: 0.1 mm.

Nota : Prosome 5 times longer than urosome. Cephalosome and pediger segment 1 fused, 4 and 5 fused dorsally, separate laterally. Posterior corners of prosome triangular lobes in lateral view. Rostrum without filaments. A1 24-segmented. Genital complex symmetrical in dorsal view, small denticles dorsally and laterally on it and following two urosomal segments. A2 coxa with 1 seta ; basis with 2 setae ; endopod 2-segmented, proximal segment with 1 seta, distal with 15 (7 terminal and 8 subterminal setae) ; exopod 8-segmented with arthrodial membrane between 3rd and 4th segments present ventrally and with 1, 3, 0 ( ?), 1, 1, 1, 1, 3 setae. Md : gnathobase with tooth-like knob on posterior face. Mx1 : praecoxal endite with 2 posterior and 9 terminal setae, proximal 2 terminal setae curved proximally. Mx2 : proximal praecoxal endite with missing serae, distal with 3 setae, 1 thicker ; proximal coxal endite with 3 setae, 1 thicker, distal with 3 setae, 1 thicker ; proximal basal endite with 4 setae, 1 thicker, 1 worm-like and 3 brush-like sensory setae, 1 brush-like seta thicker and with longer setules than others. Mxp : praecoxal endites of syncoxa with 1, 2, 3 setae, 1 worm-like ; coxal endite with 3 setae ; basis with a row of small denticles proximally, 3 medial setae, 2 setae on distal endite ; endopod 5-segmented with 4, 4, 3, 3 +1 lateral and 4 setae. P1 Von Vaupel Klein’s organ with seta of basis slightly curved and slightly recurved, anterior knob of endopod with denticles.

Planche 2 issued from : E.L. Markhaseva & F.D. Ferrari in Invert. Zool., 2005, 2 (2). [p.137, Table 2].
Byrathis sp. (Selected character states of species included in Byrathis gen. n.).
Ce = cephalosome; Mn = mandible; Pd = pediger segment; Ri = endopod; Re = exopod

Planche 3 issued from : E.L. Markhaseva & F.D. Ferrari in Invert. Zool., 2005, 2 (2). [p.138, Table 2 (contituing)].
Byrathis sp. (Selected character states of species included in Byrathis gen. n.).
Ri = endopod; Re = exopod.