Campsurus salobra,

Molineri, Carlos & Salles, Frederico F., 2017, Review of selected species of Campsurus Eaton 1868 (Ephemeroptera: Polymitarcyidae), with description of eleven new species and a key to male imagos of the genus, Zootaxa 4300 (3), pp. 301-354: 307-309

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Campsurus salobra

sp. nov.

Campsurus salobra  sp. nov.

( Figs. 25–34View FIGURES 25 – 34, 164View FIGURES 163 – 166)

Type material. BRAZIL: holotype ♂ i from Mato Grosso do Sul, Bodoquena, rio Salobra  , Canaã , S 20°33’08.8” / W 056°40’49.7”, 210 m, 27.ii.2012, FF Salles, FH Silva cols. ( CZNC)GoogleMaps  . Paratypes: 13 ♂ i and 7 ♀ i, same data as holotype (4 ♂ i and 3 ♀ i IBN, rest in CZNC)GoogleMaps  .

Male imago. Length (mm): body, 12.0–13.4; fore wing, 10.6–12.5; hind wing, 5.2–5.5; cerci, 32.0–34.0; fore leg, 4.7–5.5. General coloration whitish, with well-defined gray markings dorsally. Head yellowish white, almost completely shaded with black dorsally except medially on occiput. Lateral ocelli with purplish gray line around whitish area. Antennae whitish translucent, shaded with purplish gray. Thorax ( Fig. 164View FIGURES 163 – 166). Pronotum translucent, anterior portion almost completely shaded with gray, paler at medial zone, pronotal hump translucent; posterior pronotal portion translucent, shaded with black on lateral subrectangular mark and small submedian mark, medial line and posterior margin blackish; prosternum whitish. Mesonotum yellowish, almost completely shaded with gray except for unpigmented anteronotal projection (ap in Fig. 164View FIGURES 163 – 166), and blackish mps and area between PSP; with gray V-shaped mark (arrow in Fig. 164View FIGURES 163 – 166) on mesoscutum after anteronotal impression; pleura and sternum yellowish; metanotum yellowish shaded medially with gray. Legs: fore legs whitish, almost completely shaded with purplish gray, becoming lighter on tarsi, claws pale; middle and hind legs yellowish translucent. Wings. Membrane hyaline except base and fore margin purplish gray; fore wings with veins C, Sc and R1 purplish gray, lighter toward apex; other longitudinal and cross veins whitish translucent; hind wing with whitish veins. Abdomen ( Fig. 164View FIGURES 163 – 166) translucent whitish slightly shaded with gray dorsally except pale at medial band, lateral transversal irregular mark on terga III –VII, and lateral longitudinal mark on terga VIII –X, terga IX –X slightly darker; abdominal sterna pale without shading, except triangular anterolateral gray mark on sternum VIII. Genitalia: sternum IX with light grayish medial mark, with blunt medial projection ( Figs. 25, 29View FIGURES 25 – 34), and covered with small microtrichiae (detail in Fig. 29View FIGURES 25 – 34); pedestal bases well separated from each other, pedestals yellowish, with outer apical corner acute, projected in small parastylus ( Figs. 25, 29View FIGURES 25 – 34); forceps whitish; penes whitish except dorsal sclerotized margin yellowish and transverse gray line at base of secondary lobe, base of penes large and subquadrangular ( Figs. 25, 29View FIGURES 25 – 34), main lobe of penes conical and ventrally curved, only with tiny apical portion pointed and twisted, dorsal margin in lateral view smoothly curved without indentations ( Figs. 25–26, 29–30View FIGURES 25 – 34), secondary lobe of penes cylindrical (sl in Figs. 26, 30View FIGURES 25 – 34). Caudal filament translucent whitish.

Female imago. Length (mm): body, 12.1–15.0; fore wing, 15.5–17.0; hind wing, 6.0–7.2. Similar to male, except pigmentation more marked. Sternum VIII with fused anteromedian sockets ( Figs. 2 7–28, 31 –32View FIGURES 1 – 12View FIGURES 13 – 24View FIGURES 25 – 34), sockets relatively long and opening towards median line ( Figs. 31–32View FIGURES 25 – 34).

Egg. Length, 314 µm; maximum width, 263 µm. Ovoid outline, bowl-shaped, one polar cap present, relatively large (length 32 µm, width 142µm), formed by ca. 10 long coiled threads ( Figs. 33–34View FIGURES 25 – 34). Polar cap 0.5× maximum width of egg.

Etymology. The name alludes to the type locality.

Distribution ( Fig. 178View FIGURES 178). Brazil (Mato Grosso do Sul).

Diagnosis. Campsurus salobra  sp. nov. can be distinguished from all other species of the genus by the following combination of characters. In the adult: 1) posterior margin of male abdominal sternum IX convex and subtriangular, medially rounded (mp in Figs. 25, 29View FIGURES 25 – 34), surface covered with microtrichiae ( Fig. 29View FIGURES 25 – 34); 2) pedestal bases well separated from each other, pedestals subquadrate with outer-posterior margin projected forming a short and acute parastylus (p in Figs. 25, 29View FIGURES 25 – 34); 3) penes separated and slightly diverging distally ( Figs. 25–26, 29–30View FIGURES 25 – 34), each arm formed by a large and sclerotized lobe (ml in Fig. 30View FIGURES 25 – 34), and a relatively large secondary membranous lobe (sl in Fig. 30View FIGURES 25 – 34); 4) medium to large size (length of male fore wings 10.6–12.0 mm); 5) female sternum VIII with anteromedian paired sockets (arrow in Figs. 27, 31View FIGURES 25 – 34), sockets relatively long and rounded, opening toward medial line (arrow in Fig. 32View FIGURES 25 – 34); 6) medium sized polar cap present in the egg ( Figs. 33–34View FIGURES 25 – 34), polar cap 0.5× maximum width of egg.

Discussion. Campsurus salobra  sp. nov. is closely related to C. latipennis  and C. evanidus  ; differences among them are discussed under the first species section.


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