Limnebius lacrimosus, Perkins, 2017

Perkins, Philip D., 2017, Hydraenidae of Madagascar (Insecta: Coleoptera), Zootaxa 4342 (1), pp. 1-264 : 166

Limnebius lacrimosus , new species

Figs. 150 (habitus), 160 (aedeagus), 296 (map)

Type Material. Holotype (male): Toamasina, 18.7911S 48.4259E Alaotra Mangoro Andasibe-Mantadia NP, Mantadia 12km N of park entrance, forest pond with some vegetation, elev. 960 m, 28 xi 2014, J. Bergsten, R. Bukontaite, J.H. Randriamihaja, T. Ranarilalatiana & S. Holmgren ( MAD 14-83) ( NHRS). Paratypes: Same data as holotype (27 NHRS).

Differential Diagnosis. Habitus as in Fig. 150; a distinctively teardrop-shaped species, moderately convex, and at the "large" end of the size spectrum (ca. 1.15 mm). The dorsum is dark brown, sometimes slightly lighter along the base of the pronotum. The aedeagus ( Fig. 160) in lateral view is angulated slightly past midlength, and just beyond this angle is the greatest width. The lateral view can only be compared with that of L. nanostillus ( Fig. 159), but the angulation is much greater in that species, and the apical part of the main piece differs markedly in the two species.

Description. Size: holotype (length/width, mm): body (length to elytral apices) 1.15/0.66; head width 0.42; pronotum 0.29/0.66; elytra 0.71/0.66; approximate height, lateral view 0.49. Dorsum dark brown to piceous, pronotum sometimes with lighter area along base. Body form distinctively drop-shaped. Pronotum with disc shining, non-microreticulate, very sparsely finely punctulate, some punctures with very indistinct, very short adpressed seta; area posterior to eye (side view) with slightly larger punctures, each puncture with adpressed seta, longer than setae on disc. Elytra very weakly effacedly microreticulate, with punctures and setae similar to those on pronotum.

Males with first three pro- and mesotarsal segments slightly enlarged, with adhesive setae. Labroclypeal suture arcuate in frontal view in both sexes. Labrum simple, similar in sexes. Lateral angle of elytral apices more widely rounded and apices more truncate in males than in females, sutural angle more acute in females.

Etymology. Named in reference to the teardrop-shaped body.