Limnebius retiolus, Perkins, Philip D., 2015

Perkins, Philip D., 2015, Taxonomy of the water beetle genus Limnebius Leach in southern Africa (Coleoptera: Hydraenidae), Zootaxa 3948 (1), pp. 41-59 : 49

publication ID	https://doi.org/ 10.11646/zootaxa.3948.1.3
publication LSID	lsid:zoobank.org:pub:0953E397-4543-4D3C-861F-415447C08179
DOI	https://doi.org/10.5281/zenodo.6101393
persistent identifier	https://treatment.plazi.org/id/37323055-8532-CA16-5696-590CF9E80AC3
treatment provided by	Plazi
scientific name	Limnebius retiolus
status	sp. nov.

Treatment

Limnebius retiolus View in CoL , new species

Figs. 7 View FIGURES 5 – 8 (habitus), 18 (aedeagus), 34 (map)

Type material. Holotype (male): South Africa: Northern Cape Province, Cape Farm Ezelsfontein, shore washing, 30° 24' S, 18° 5' E, 30 x 1977, Endrödy-Younga (#1407) ( TMSA). Paratypes (31): South Africa: Northern Cape Province, Same data as holotype (16 TMSA); Cape Region, 12 km SE Garies, drying stream, 30° 33' S, 22° 56' E, 20 ii 1997, G. Challet (15 NMW).

Differential Diagnosis. Habitus as illustrated ( Fig. 7 View FIGURES 5 – 8 ); a small species with oval body form, and distinctly microreticulate dorsum. Aedeagus ( Fig. 18) relatively short and wide, moderately arcuate in ventral view; apically produced in a large lobe; long setae in a row, located subapically and to the right side, and shorter setae distributed around apical lobe, as illustrated; internal capsule approximately located in middle ½ of aedeagus; gonopore located in area of row of setae. The general aedeagal shape suggests a relationship with L. capensis and L. suaviculus .

Description. Size: holotype (length/width, mm): body (length to elytral apices) 0.95/0.51; pronotum 0.24/ 0.51; elytra 0.59/0.51; approximate height, lateral view 0.34.

Dorsum brown to dark brown, slightly paler laterally on clypeus. Body form drop-shaped, apically moderately acuminate, side margin indented slightly where pronotum joins elytra. Dorsum microreticulate, dull, very sparsely finely punctulate, each puncture with very short adpressed seta; area posterior to eye (side view) with few slightly larger punctures, each puncture with adpressed seta, longer than setae on disc. Males with first three pro- and mesotarsal segments slightly enlarged, with adhesive setae. Labroclypeal suture bisinuate in frontal view in both sexes. Labrum simple. Elytral apices slightly more widely rounded in males than in females.

Etymology. Named in reference to the microreticulate dorsum.

Distribution. Currently known from two localities in the Northern Cape Province ( Fig. 34 View FIGURES 32 – 34 ).