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