Campsurus demeni, Molineri & Salles, 2017

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 : 329-331

Campsurus demeni sp. nov.

( Figs. 107–111 , 173 )

Material. Holotype ♂ i from BRAZIL, Amazonas, Barcelos , rio Demeni , boca do rio, 8–9.viii.2009, S 0° 25' 29" / W 62° 54' 20", pennsylvania light trap, N Hamada col. ( CZNC). Paratypes: 27 ♂ i same data as holotype ( CZNC, except 5 in IBN, slide IBN775CM) ; 50 ♂ i from Amazonas, Barcelos, Serrinha, rio Aracá , N 00°24'34" / W 63°23'17", 29.vii.2009, N 00°24'33,88" / W 63°23'17,16", pennsylvania light trap, N Hamada col. ( CZNC) ; 3 ♂ i from Amazonas, Arquipélago de Anavilhanas, Manaus , 31.vii, 2000, N 2° 40' 20" / W 60° 46' 40", JL Nessimian col. ( CZNC) ; 6 ♂ i from Amazonas, Barcelos, Serrinha, rio Aracá , 29–30.vii.2009, N 00°24'33,88" / W 63°23'17,16", pennsylvania light trap, N Hamada col. ( CZNC); and 6 ♂ i ( CZNC, except 2 at IBN) from Roraima, Boa Vista , Rio Cauamé , N 2° 49' 11" / W 60° 40' 24", 28.ii.2003, UV light-trap, N Hamada col. ; 2 ♂ i from Acre, Mancio Lima, Parque Nacional da Serra do Divisor, rio Azul , Colocaçao Joao Eracle , 15.iii.2006, AR Calor col. (IBN).

Male imago. Length (mm): body, 6.6–7.3; foreleg, 3.4–3.6; fore wing, 6.0–7.2; hind wing, 2.9–3.5; cerci, 15.5–19.0. General coloration yellowish white ( Fig. 173 ). Head whitish, shaded with black dorsally among ocelli and along hind margin, genae and occiput not shaded. Antenna whitish shaded, with gray on apices of scape and pedicel. Thorax ( Fig. 165 ). Pronotum nearly completely translucent, but slightly shaded with gray, except at pale transverse curved band on lateral area (limit between anterior and posterior pronotal portions) and subapical transverse line crossing entire width of pronotum near hind margin; shaded more strongly on medial line and lateral sides of anterior pronotal portion; propleura and sternum whitish yellow, diffusely shaded gray. Mesonotum yellowish white, shaded very slightly with gray, mainly along medial line, parapsidal sutures and between PSP; pleurae and sternum shaded gray, darker on dash anterior to wing insertion, along main sutures, and mesofurcasternum. Metanotum shaded gray medially, metafurcasternum shaded gray. Legs. Fore coxa yellowish white, shaded with gray except on lateral stripe; femur whitish, shaded with gray on margins and basal 2/3 of dorsal surface; remaining segments translucent, shaded gray, except claws. Middle leg whitish, hind leg yellowish translucent, both shaded with gray almost completely. Wings. Membrane hyaline, veins whitish translucent, shaded with gray, except on crossveins posterior to R1 sector on fore wing and all crossveins of hind wing. Abdomen ( Fig. 173 ) whitish, shaded with gray dorsally, except on medial band and oblique lateral dash on terga I–VII; tergum VIII with thin, blackish, medial line and slightly paler sigilla; tergum IX with small, blackish submedian)(-shaped marks near fore margin. Pleural folds with blackish maculae. Abdominal sterna almost completely shaded, except for pale lateral lines along inner margin of gill sclerites and sublateral pale spots near anterior margins of sterna II– VIII. Genitalia ( Figs. 107–111 ): sternum IX slightly concave distally, shaded with gray at anterior margin and lateral zones, with 3- or 4-pointed microlepides ( Fig. 111 ); pedestal with long and apically rounded parastylus (p in Fig. 110 ) and inner corner roundly projected (ic in Fig. 110 ), pedestals distinctly separated in middle ( Fig. 107 ); forceps and penes translucent whitish, except for rounded secondary lobe of penes (sl in Fig. 109 ), grayish; main lobe of penes apically rounded, with sclerotized margin toward medial line (ml in Fig. 109 ); outer margin covered with tiny spines distally (arrow in Fig. 108 ). Paraprocts protruding ( Fig. 108 ), shaded gray laterally. Caudal filaments whitish translucent.

Etymology. The specific epithet is a noun in apposition. The species is named in allusion to the type locality, Rio Demeni , the southern limit of Yanomami´s territories.

Distribution ( Fig. 180 ). Brazil (Amazonas, Roraima, Acre).

Diagnosis. Campsurus demeni sp. nov., known from male adults, can be characterized as follows: 1) posterior margin of male abdominal sternum IX slightly concave ( Figs. 107 ); 2) pedestal of each side distinctly separated in the middle, pedestal with long and apically rounded parastylus and inner corner roundly projected ( Figs. 107, 110 ); 3) main lobe of penes apically rounded, with sclerotized margin toward the medial line and covered with small spines on outer margin ( Figs. 108–109 ), secondary lobe small and rounded ( Fig. 109 ); 4) paraprocts protruding distally ( Fig. 108 ); 5) small size (length of male fore wings 7 mm).

Discussion. See discussion under previous species. The numerous small spines covering the penes near the outer margins are unique to this species.

Figures

FIGURES 180. Distribution maps.

FIGURES 100 – 110. Male imagos. Campsurus lucidus: 100, genitalia, v. v.; 101, detail of penes, v. v.; 102, detail of pedestal, v. v. Campsurus sinamari sp. nov.: 103, genitalia, v. v.; 104, detail of penes, v. v.; 105 – 106, details of pedestal, v. v. Campsurus demeni sp. nov.: 107, genitalia, v. v.; 108, male terminalia, l. v.; 109, detail of penes, v. v.; 110, detail of pedestal, v. v. Abbreviations: ic = inner corner, ml = main lobe, p = parastylus, sl = secondary lobe.

FIGURES 111 – 116. Campsurus demeni sp. nov.: 111, penes and pedestal, with detail of microlepides on sternum IX, v. v. (SEM). Campsurus lucidus (Bolivia): 112, male mesosternum (p = mesofurcasternal plate, im = inner margin of plate, L = leg); 113, female abdominal sterna VI – IX (g = gonopore and eggs, sk = sockets, roman numbers = number of abdominal segment); 114, same, detail after KOH treatment. Campsurus sinamari sp. nov. (KOH treated): 115, sternum VIII; 116, detail of sockets. Arrows indicate socket´s openings.

FIGURES 171 – 175. Male imago, general view, dorsal: 171, C. povilla sp. nov.; 172, C. lucidus; 173, C. demeni sp. nov.; 174, C. indivisus (from Alegre); 175, C. inusitatus sp. nov.

FIGURES 163 – 166. Male imago, general view, dorsal: 163, C. latipennis; 164, C. salobra; 165, C. essequibo; 166, C. nessimiani sp. nov. Abbreviations: ap = anteronotal projection, mps = medio parapsidal suture, ph = pronotal hump, psp = posteroscutal protuberances.