Copelatus bimaculatus Resende & Vanin, 1991

Hájek, Jiří, Alarie, Yves, Benetti, Cesar J., Hamada, Neusa, Springer, Monika, Hendrich, Lars, Villastrigo, Adrián, Torres, Rodulfo Ospina, Basantes, Michael S. & Balke, Michael, 2024, Underestimated diversity and range size of diving beetles in tank bromeliads-Coleoptera of ‘ hygrofloric’ lifestyle (Dytiscidae), Zoological Journal of the Linnean Society (Zool. J. Linn. Soc.) 200 (3), pp. 720-735 : 722

Copelatus bimaculatus Resende & Vanin, 1991

( Figs 1A–B , 2A–B )

Aglymbus bimaculatus Resende & Vanin, 1991: 124 ( Brazil: São Paulo Province: Salesópolis: Guaratuba).

Copelatus bimaculatus : Balke et al. 2008: 6357.

Material examined: Brazil: 1♂ 1♀, Nova Friburga , Macaé de Cima, 1200 m, viii.1997, (LHCM) ; 2♀♀, Florianopolis , Santo Amaro da Imperatriz, 300 m, x.2004 (ZSMG) . 7♂♂ 5♀♀, same locality, but: in Nidularium innocentii , 15.ii.2005, Zillikens leg. (NMPC, ZSMG) .

Diagnosis: Habitus drop-shaped, more strongly attenuated posteriorly than anteriorly, broadest at 1/3 of elytral length, slightly convex. Body black, clypeus, margins of pronotum and scutellar shield somewhat reddish translucent, appendages testaceous; elytra completely black in specimens from Nova Friburgo ( Fig. 1B ), but with small oval basal orange spot between striae 4–8 in specimens from St. Amaro ( Fig. 1A ). Dorsal surface submatt due to well impressed reticulation and presence of fine longitudinal striolae. Head moderately broad, c. 0.57 × width of pronotum, trapezoidal. Antennae with antennomeres rather broad, thus of stouter appearance. Pronotum transverse, broadest at posterior angles; sides strongly and evenly curved, lateral beading distinct except for anterior corners. Elytral striation consisting of 11 superficially impressed discal + a submarginal stria: odd striae, especially striae 5, 7, 9 often incomplete and badly perceptible due to striolation, in some specimens almost absent. Protibia modified, slightly angled near base, distinctly broadened anteriorly, club shaped. Pro- and mesotarsomeres 1–3 distinctly broadened, ventrally with adhesive setae. Natatorial setae present only on dorsal side of metatarsomeres. Median lobe of aedeagus in lateral aspect ʻCʼ- shaped, apex obtusely pointed; in ventral aspect median lobe evenly attenuating to straight, pointed apex ( Fig. 2A–B ). Parameres broad, ʻDʼ -shaped. Female somewhat smaller than male: TL ♂♂: 6.1–6.4 mm; TL ♀♀: 5.9–6.3 mm. Distribution : The species is distributed in the Atlantic forests, along the coast from Rio de Janeiro to Santa Catarina provinces, south-eastern Brazil ( Fig. 3 ).

Figures

Figure 1. Habitus of bromeliadicolous Copelatus. A, C. bimaculatus (Santo Amaro da Imperatriz).B, C. bimaculatus (Nova Friburgo). C, C. bromeliarum (Henri Pittier).D, C. espinhasso (holotype). Scale bar = 2.0 mm.

Figure 2. Male genitalia of Copelatus. A, C. bimaculatus (Santo Amaro da Imperatriz). B, C. bimaculatus (Nova Friburgo).C, C.bromeliarum (El Tucuche).D, C. bromeliarum (Henri Pittier). E, C. espinhasso (holotype).F, C. florae (Alto de Piedra). G, C. florae (Manaus). H, C.panguana (holotype). a, median lobe in lateral view. b, median lobe in ventral view.c, paramere.Scale bar = 1.0 mm.

Figure 3. Distributional map of bromeliadicolous Copelatus species.