Limnebius maximadus, Perkins, 2017

Perkins, Philip D., 2017, Hydraenidae of Madagascar (Insecta: Coleoptera), Zootaxa 4342 (1), pp. 1-264 : 166-169

Limnebius maximadus , new species

Figs. 151 (habitus), 161 (aedeagus), 296 (map)

Type Material. Holotype (male): Toamasina, Alaotra Mangoro: Analamazoatra SR: close to park entrance: S 18.93573 E 0 48.41741, GB Nets and sieves, stagnant pools in tributary to Analamazoatra river , elev. 930 m, 9 xi 2011, J. Bergsten, R. Bukontaite, T. Ranarilalatiana, & J.H. Randriamihaja ( MAD11-32 ) ( NHRS) . Paratypes (38): Same data as holotype (7 NHRS) . Antananarivo, Moramanga Andasibe, Andasibe NP, Fish Park , standing water, very shallow, N:-18.93533, E:48.41783, elev. 933 m, 18° 56' S, 48° 25' E, 5 i 2007, Isambert et al. (P61 Bi 14) (4 NHRS) ; Fianarantsoa, Matsiara Ambony, Ranomafana NP, next to Sahamalaotra trail entrance; forest stream with sandy bottom, elev. 1130 m, 21.2395S 47.3947E, 2 xi 2014, P. D. Perkins ( MAD14-04 ) (1 MCZ) . Toamasina, 18.9355S 48.4166E Alaotra Mangoro Andasibe-Mantadia NP, Analamazoatra 150m E of park entrance, shallow partly dried out forest pond, elev. 930 m, 18° 56' S, 48° 25' E, 27 xi 2014, J. Bergsten, R. Bukontaite, J.H. Randriamihaja, T. Ranarilalatiana & S. Holmgren ( MAD14-14 ) (9 NHRS) ; 18.9357S 48.4174E Alaotra Mangoro, Andasibe-Mantadia NP, Analamazoatra , 250m E of park entrance, dried up river bed with stagnant pools, elev. 930 m, 18° 56' S, 48° 25' E, 27 xi 2014, J. Bergsten, R. Bukontaite, J.H. Randriamihaja, T. Ranarilalatiana & S. Holmgren ( MAD14-18 ) (15 NHRS); Andasibe , fish ponds at park entrance, elev. 910 m, 18° 46' S, 48° 24' E, 1 xi– 30 xii 2004, M. Balke (MD 036) (2 ZSMC).

Differential Diagnosis. Habitus as in Fig. 151; one of the larger Limnebius known from Madagascar, males ca. 1.08 mm long (females slightly larger). A teardrop-shaped species, moderately convex, that does not have the prothorax, in lateral view, at a distinct angle to the elytra. The aedeagus ( Fig. 161) is weakly arcuate in both views, and is slightly wider in ventral view than lateral view; the apex is sharply pointed and bears about 13 setae; the gonopore bearing tube is of average length when compared with the length of the main piece.

Description. Size: holotype (length/width, mm): body (length to elytral apices) 1.08/0.59; head width 0.40; pronotum 0.27/0.59; elytra 0.65/0.59; approximate height, lateral view 0.42. Dorsum brown to piceous. Body form distinctively drop-shaped. Pronotum with disc strongly shining, non-microreticulate, very sparsely finely punctulate, each puncture with very short adpressed seta; area posterior to eye (side view) with slightly larger punctures, each puncture with adpressed seta, slightly 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 comparatively large size, and presence in Madagascar.