A revision of the water beetle genus Hydraena Kugelann for southern Africa (Coleoptera: Hydraenidae) PERKINS, PHILIP D. Zootaxa 2014 2014-01-29 3758 1 1 92 3N3SC Perkins 2014 [151,421,1113,1139] Insecta Hydraenidae Hydraena Animalia Coleoptera 10 11 Arthropoda species cooperoides sp. nov.   Figs. 3(habitus), 5 (aedeagus), 87 (map)   Type material.  Holotype(male):  Namibia: Naukluft River, shore washing, 24° 16' S, 16° 15' E,  10 viii 1989, Endrödy-Younga& Klimaszewski(#2644) ( TMSA).   Paratypes(799):  Angola: 20 km. E. Luanda, Luanda-Catete Highway, water-hole, gravel and clay bottom, 8° 50' S, 13° 22' E,  9 x 1949, B. Malkin(10 BMNH);  Altoplano: Ongueria, side pools above waterfall, elev.  1615 m, 15° 19' S, 13° 32' E,  12 vi 1954, J. Balfour-Browne(263) (4 BMNH);  Ongueria, in fine sand at side of stream above cataracts, elev.  1615 m, 15° 19' S, 13° 32' E,  13 vi 1954, J. Balfour-Browne(1 BMNH);  Da Huila, Tchivinguire, SE 1513 Ab; H22344, 15° 10' S, 13° 21' E,  14-17 xi 1974, none given on label (4 SMW);   Namibia: Kavango: Popa Falls, lux, 18° 7' S, 21° 35' E,  26 ii–1 iii 1992, M. Uhlig(1 ZMHB);  Namib-Naukluft Park, Naukluftspring, spring, 24° 15' S, 16° 14' E,  28-30 xi 1997, Kirk-Spriggs& Marais(6 SMW);  Namib-Naukluft Park, Tsams Ost, permanent mountain rivulet, shore sievings and washing, 24° 14.4' S, 16° 6.2' E,  26-28 xi 1997, M. Uhlig(2 ZMHB);  Namib-Naukluft Park, Tsams Ostspring, spring, 24° 14' S, 16° 6' E,  26-28 xi 1997, Kirk-Spriggs& Marais(3 SMW);  Namib-Naukluft NP: Naukluft River, Phragmitesgrass + leaf litter, shore washing + sievings, 24° 15.78' S, 16° 14.08' E,  29-30 xi 1997, M. Uhlig(24 ZMHB); Namib- Naukluft NP, Waterkloof, algae + Carex+ Phragmites, shore washing, 24° 16.8' S, 16° 14.2' E,  29 xi 1997, M. Uhlig& E. Marais(1 ZMHB);  Naukluftcascades, cascades, 24° 16' S, 16° 15' E,  12 viii 1989, Endrödy-Younga& Klimaszewski(#2648) (2 TMSA);  Naukluft, Naukluft Park, shore washing, 24° 16' S, 16° 15' E,  26 x 1974, Endrödy-Younga(#431) (8 TMSA);  Naukluft River, shore washing, 24° 16' S, 16° 15' E,  10 viii 1989, Endrödy- Younga& Klimaszewski(#2644) (730 TMSA).  Additional material: Same data as holotype (~1000 TMSA).   Differential diagnosis.Very similar in dorsal habitus and ventral characters to  H. cooperi( Figs. 2, 3). The elytra are often slightly more narrowed toward the apices than in  H. cooperi, and the two species are largely allopatric ( Figs. 65, 87), but reliable determinations will require careful examination of the aedeagi ( Figs. 4, 5).   Description. Size: holotype(length/width, mm): body (length to elytral apices) 1.51/0.62; head 0.26/0.37; pronotum 0.36/0.48, PA 0.41, PB 0.46; elytra 0.95/0.62.   FIGURE 3.  Hydraena cooperoides, holotype, dorsal and lateral habitus. Dorsum of head piceous; pronotum light brown around piceous macula; elytra brown; legs light brown to testaceous; maxillary palpi testaceous. Frons punctures ca. 1xef, larger and denser near eyes than medially; interstices shining, 0.5–1xpd laterally, 1– 4xpd medially. Clypeus mcr laterally, very finely sparsely punctulate medially. Mentum weakly concave medially, moderately densely finely punctulate, interstices shining; postmentum punctate, with deep depression on each side. Genae raised, shining, without posterior ridge. Pronotum laterally slightly emarginate in front of and behind middle; anterior margin straight behind eyes, emarginate behind frons, scintilla absent; punctures on disc slightly larger than those of frons, interstices strongly shining, 1–4xpd, punctures slightly larger and denser at anterior and posterior; PF1 absent; PF2 very shallow; PF3 shallow; PF4 very shallow or obsolete. Elytra weakly arcuate laterally; summit of posterior declivity slightly behind midlength; lateral explanate margin narrow; on basal 1/3 punctures ca. 1xpd largest pronotal punctures, punctures becoming finer and more widely spaced toward posterior. Intervals not raised, shining, on basal 1/3 ca. 2xpd, as are interstices between punctures of a row. Apices in dorsal aspect weakly separately rounded, in posterior aspect margins forming deep angle with one another.   FIGURES 4–5.Aedeagi of holotypes of  H. cooperiand  H. cooperoides, and aedeagal variants of  H. cooperi. Ratios of P2 width and plaque shape (P2/w/l/s) ca. 2/1/1/5. P1 laminate; median carina sinuate in profile. P2 l/ w ca. 2/1, sides becoming parallel toward blunt apex, apex raised slightly above mesoventral intercoxal process. Plaques very small, indistinct, oval, margins not strongly demarcated, located at sides of deep median depression. Metaventrite without midlongitudinal carina between intercoxal process and median depression. AIS width at slightly arcuate posterior margin ca. 2x P2. All tibiae slender. Protibiae slightly arcuate, meso- and metatibiae straight. Abdominal apex symmetrical; last tergite with apicomedian notch. Female (microslide mount, n=1): last tergite moderately sharply rounded, with minute apicomedian notch, ca. 36 hooked setae, closely set, in irregular row; gonocoxite not midlongitudinally divided, apical margin moderately sharply rounded, low transverse ridge evident at border of microreticulation; spermatheca simple, typeC shape.   Etymology.Named in reference to the relationship to  H. cooperi, as evidenced by the male genitalia.   Distribution.Currently known from widely separated localities in Namibiaand southern Angola( Fig. 87). 3311567399 1989-08-10 TMSA Endrody-Younga & Klimaszewski Namibia -24.266666 Naukluft River 1252 16.25 10 11 1 holotype 3311567358 1949-10-09 BMNH B. Malkin Angola -8.833333 Luanda-Catete Highway 1300 13.366667 10 11 1 Luanda paratype 3311567585 1954-06-12 BMNH Balfour-Browne Angola 1615 -15.316667 Ongueria 1285 13.533334 Altoplano 10 11 1 paratype 3311567523 1954-06-13 BMNH Balfour-Browne Angola 1615 -15.316667 Ongueria 1285 13.533334 10 11 1 paratype 3311567543 H22344 1974-11-14 1974-11-17 1974-11-14 SMW Angola Da -15.166667 Ab 1286 13.35 Tchivinguire 10 11 1 Huila paratype 3311567469 1992-02-26 1992-03-01 1992-02-26 ZMHB M. Uhlig Namibia -18.116667 Popa Falls 1276 21.583334 10 11 1 Kavango West paratype 3311567595 1997-11-28 1997-11-30 1997-11-28 SMW Kirk-Spriggs & Marais Namibia -24.25 Naukluft 1252 16.233334 Namib-Naukluft Park 10 11 1 paratype 3311567416 1997-11-26 1997-11-28 1997-11-26 ZMHB Uhlig Namibia -24.24 Tsams Ost 125 16.103333 Namib-Naukluft Park 10 11 1 paratype 3311567456 1997-11-26 1997-11-28 1997-11-26 SMW Kirk-Spriggs & Marais Namibia -24.233334 Tsams Ost 1252 16.1 Namib-Naukluft Park 10 11 1 paratype 3311567343 1997-11-29 1997-11-30 1997-11-29 ZMHB Namib-Naukluft NP & M. Uhlig Namibia -24.263 Phragmites 12 16.234667 Naukluft River 10 11 1 paratype 3311567336 1997-11-29 ZMHB M Uhlig & E. Marais Namibia Waterkloof -24.28 Phragmites 125 16.236666 Carex 10 11 1 paratype 3311567383 1989-08-12 TMSA Endrody-Younga & Klimaszewski Namibia -24.266666 Naukluft 1252 16.25 10 11 1 paratype 3311567375 1974-10-26 TMSA Endrody-Younga Namibia -24.266666 Naukluft Park 1252 16.25 Naukluft 10 11 1 paratype 3311567458 1989-08-10 TMSA Younga & Klimaszewski Namibia -24.266666 Naukluft River 1252 16.25 10 11 1 paratype 3311567552 [199,868,1831,1856] 1989-08-10 TMSA Endrody-Younga & Klimaszewski Namibia -24.266666 Naukluft River 1252 16.25 10 11 1