Pneuminion endroedyi, Perkins, Philip D., 2004

Perkins, Philip D., 2004, A revision of the South African endemic water beetle genus Pneuminion Perkins (Coleoptera: Hydraenidae), Zootaxa 538, pp. 1-38 : 7-8

Pneuminion endroedyi new species

( Figures 3 , 13, 22 )

Type Material. Holotype (male): South Africa: S. W. Cape Mts., Hawequas SE, 1100m, 33.41S ­ 19.06E, water coll. in rapid, 5.xi.1973, Endrödy­Younga (#203); deposited in the TMSA. Paratypes: Same data as holotype, (13 TMSA). S. W. Cape, Bainskloof, 33.30S ­ 19.10E, shore washing, 10.XI.1973, Endrödy­Younga (#227), (2 TMSA). Cape Prov., Cederberg, 1130m, 32.28S ­ 1914E, sifted marsh shore, 7.xi.1983, Endrödy­Younga (#2055), (1 TMSA). Representative duplicate specimens deposited in AMG, CMNH, FMNH, and MCZ.

Diagnosis. Most similar to P. tubum , but with elytra less shining; recognized by the more strongly punctate and granulate elytra, each setal base with a small granule at its anterior margin, the dull head and pronotum, the transversely convex body form ( Fig. 3 ), and the male genitalia.

Description. Size (mm x 100; length/width): body (length to elytral apices) 148/67, head 30/41, pronotum 37/56, elytra 93/67. Form transversely convex.

Dorsum dark brown to piceus, legs and maxillary palpi brown; dorsal setae fine and short, testaceous. Labrum, clypeus and frons dull, micropunctulate. Frons discal punctures small, indistinct. Fovea in front of ocellus narrow, oblique sulcus, about as wide as ocellus.

Pronotum dull, obsoletely micropunctulate; punctures on reliefs small, each with short, granule­based seta, granule dividing puncture in half, punctures therefore appearing paired; all foveae shallow; oblique anterior fovea on each side shallowly connecting to midlongitudinal fovea; posterior U­shaped fovea well­developed; setae at lateral margin flat on cuticle in dry specimens. Pronotal postocular emargination deeper and less symmetrical in females than males.

Elytra with setae of series and interseries almost equally developed, resulting in narrowly separated unilinear rows of very fine setae, about 18 on each elytron; setae of intervals slightly more apparent than those of series; all setal bases with small, distinct granule at anterior margin; serial punctures moderately large, separated serially by less than puncture diameter, wider than intervals and not shining at sides; explanate margin very narrow in both sexes.

Aedeagus: main­piece length 38, total length 50; duct nearly symmetrically S­shaped, becoming gradually thicker from midlength to apex, apex knob­shaped; main­piece bladeshaped, lacking ridge/groove to support duct; paramere setae comparatively sparse, grouped at apex ( Fig. 13).

Etymology. Named in honor of the late Sebastian Endrödy­Younga.

Figures

FIGURE 3. Pneuminion endroedyi holotype. Dorsal and lateral habitus.

FIGURES 21 – 22. Pneuminion distribution maps. — 21. All Pneuminion collecting sites. — 22. P. endroedyi.