Eutrichodesmus regularis Golovatch, Geoffroy, Mauriès & Vanden Spiegel 2009

Length of adults of both sexes ca 9.0-10.0 mm, width 1.7-1.8 mm, body broadest at segment 3 or 4. Holotype ca 10 mm long and 1.7 mm wide. Coloration uniformly pallid, shown pinkish because of a photographic artifact (Fig. 4).
Adults with 20 segments, pattern of conglobation typical of “doratodesmids” (Figs 4, 5A). Head, antennae (Fig. 5E), tegument (Figs 6A-C), sterna (Fig. 6E), gonopod aperture (Fig. 6F) and many other characters (Figs 5F, 6D) much as in E. distinctus sp. n., but collum more regularly tuberculate and slightly flattened mid-dorsally (Fig. 5B). Metaterga behind collum with three transverse, very regular and isostictic rows of subequallysized, rounded, flat, nearly undiff erentiated tubercles (Figs 5A-D), each crowned with a short, 2-segmented, phylloid seta (Fig. 6C). Paraterga directed ventrolaterad, rather broad, slightly surpassing level of venter, slightly interrupting general outline of convex dorsum (Figs 5A, C, 6D); paraterga 2 strongly enlarged, each margin nearly entire, with only very faint traces of a series of small lobulations anterolaterally (Figs 4, 5A, B, D). Following paraterga broadly rounded and slightly 3- or 4-lobate laterally and at least distinctly bilobate caudolaterally (Figs 5A, C, D, 6F). Limbus very faintly crenulate, almost hidden by nearby abundant microvilli (Fig. 6A). Pore formula normal, ozopores poorly visible, located dorsally near tip of ventrocaudal lobulation (Figs 5C, D).
Legs relatively long, slightly surpassing edge of paraterga (Figs 6D, E).
Gonopods (Figs 6F, G, 7A-E) relatively complex. Coxae subquadrate, large, microtuberculate, nearly bare, with only a few, mostly short setae on and near base of a small ventro-apical lobe. Telopodite considerably longer than coxite, slightly stouter and setose in its basal half, with an inconspicuous, digitiform, simple, lateral, distally papillate, distofemoral process (dp) at about midway, more distally with another simple outgrowth with its base marking recurvature point of a relatively short seminal groove; acropodite (= solenomere) relatively stout, lamelliform, slightly curved along main axis, with two small denticles apically and a conspicuous pilose-spinulate pulvillus near base (Figs 7E, F).

Type material: Vietnam, Lao Cai Prov., Sa Pa, Hang Ta Phin Cave, hand collected, 11.VIII.2003, leg. L. Deharveng and Bedos (Vn0308-009), holotype ♂ (MNHN JC 318), paratypes: 1 ♂, 2 ♀, 1 subad., 1 juv. (MNHN JC 318), 1 ♀ (ZMUM), 1 ♂ (SEM).