Campsurus lucidus Needham & Murphy, 1924

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 : 327-329

Campsurus lucidus Needham & Murphy

( Figs. 100–102 , 112–114 , 172 )

Campsurus lucidus Needham & Murphy, 1924: 16 (male); Ulmer, 1942: 122 (male); Traver, 1947: 376 (male), Domínguez et al., 2006: 573.

Type material. Holotype ♂ i from PERU, between Puerto Alfonso [approx. S 2° 12' 32" / W 71° 0' 14"] and the mouth of Rio Igara-Paraná [approx. S 2° 9' 29" / W 71° 46' 1"], río Putumayo, 14.viii.1920, JC Bradley col. (genitalia and wings, CUIC slides N° 617.1).

Additional material. ARGENTINA: 2 ♂ i from Misiones, P.N. Iguazú, río Iguazú, Puerto Canoas, 26.xi.1998, E Domíguez, C Molineri & C Nieto Cols. (IBN). BOLIVIA: 10 ♂ i (slides IBN487CM, IBN611CM) and 10 ♀ i (slide IBN612CM) from Beni , río Itenez , Versailles , 147 m, S 12° 39' 36" / W 63° 22' 32", 5.v.2006, E Domínguez & C Molina cols. (IBN). BRAZIL: 3 ♂ i (1 without terminalia) from Mato Grosso do Sul, Lagoa dos Patos, 26.i.1998, S 22° 43' 12" / W 53° 17' 37", A Takeda col. ( CZNC) ; 1 ♂ i Mato Grosso do Sul, Lagoa Guaraná , 24.iii.1998, S 22° 43' 26" / W 53° 18' 3", A Takeda col. (IBN) ; 2 ♂ i from Roraima, Boa Vista, Rio Cauamé , N2° 49' 11" / W 60° 40' 24", 28.ii.2003, UV light trap, N Hamada col. ( CZNC).

Male imago. Length (mm): body, 6.8–8.9; foreleg, 2.8–3.5; fore wing, 6.2–8.0; hind wing, 2.7–3.7; cerci, 16.0–21.0. General coloration yellowish white ( Fig. 172 ). Head ( Fig. 172 ) whitish, shaded with black dorsally, except along submarginal band on occiput and genae. Antenna whitish, shaded with light gray. Thorax ( Fig. 172 ). Pronotum translucent, shaded with black on anterior portion (except hump) and anteromedian quadrangular zone of posterior portion; mediolongitudinal line blackish; lateral margins of pronotal posterior portion yellowish white; pleurae and sternum yellowish white, with irregular gray markings. Mesonotum whitish yellow, shaded with black along medial line, carina and between PSP; shaded with gray on PSP and outwards from parapsidal sutures; mesopleurae paler with two black dashes (one anterior oblique and other median horizontal); mesosternum shaded black along carinae, and gray on katepisternum and furcasternum. Metanotum yellowish white, shaded with gray, ventrally with black and gray markings ( Fig. 112 ). Metanotum shaded gray medially, metafurcasternum shaded gray. Legs whitish, shaded gray on fore tibia and fore tarsi and on small marks on vestiges of mid and hind legs. Wings. Membrane hyaline, veins whitish translucent, shaded brownish gray, fore wing darker on Sc and R1. Abdomen ( Fig. 172 ) whitish translucent, shaded with gray almost completely except on pleural zones, intersegmental membranes, and smaller marks on terga and sterna. Pleural folds with blackish maculae. Genitalia ( Figs. 100–102 ): sternum IX ( Fig. 100 ) straight to slightly convex distally, whitish translucent, shaded with gray at fore margin and anterolateral zones; pedestal with long and apically rounded parastylus (p in Fig. 102 ) and inner corner roundly projected (ic in Fig. 102 ), pedestals distinctly separated in middle; forceps and penes translucent whitish; main lobe of penes (ml in Fig. 101 ) short and stout, apically pointed, with sclerotized margin toward medial line, this margin bearing very small granules dorsally; secondary lobe of penes (sl in Fig. 101 ) short and rounded. Paraprocts whitish and protruding distally. Caudal filaments whitish translucent.

Female imago. Length (mm): body, 6.6–8.0; fore wing, 7.5–8.0; hind wing, 2.5–2.7; cerci, 1.8–2.0. Similar to male except membrane of wings slightly tinged yellowish white and color pattern more strongly and widely marked. Abdominal sternum VIII with paired anteromedian sockets near margin, sockets contiguous medially and opening rearwards ( Fig. 113–114 ).

Egg. Length: 290–300µm, width, 235–240µm. General color yellowish white, polar cap absent. Whitish amorphous adhesive structure (100µm length) located on convex side of egg.

Distribution ( Fig. 180 ). Peru (Putumayo, Needham & Murphy 1924), Guyana (Rockstone and Bartica, Traver 1947), Brazil (Santa Catarina, Ulmer 1942), Colombia ( Domínguez et al. 2006). New records: Brazil (Mato Grosso do Sul, Roraima), Bolivia, Argentina.

Diagnosis. Campsurus lucidus , known from adults of both sexes, can be characterized as follows: 1) posterior margin of male abdominal sternum IX straight to slightly convex ( Fig. 100 ); 2) pedestal of each side distinctly separated in the middle ( Fig. 100 ), pedestal with long and apically rounded parastylus and inner corner roundly projected ( Fig. 102 ); 3) main lobe of penes short and stout, apically pointed, with sclerotized margin toward the medial line, this margin bearing very small granules dorsally ( Fig. 101 ), secondary lobe small and rounded ( Fig. 101 ); 4) paraprocts protruding distally (similar to Figs. 108 ); 5) small size (length of male fore wings 6–8 mm).

Discussion. While the redescription was based mainly on Bolivian material, measurements involved all available material. Campsurus lucidus is closely related to C. demeni sp. nov. and C. sinamari sp. nov., with small differences in male genitalia characterizing each of them: C. lucidus shows penes relatively stouter ( C. demeni sp. nov. and C. sinamari sp. nov. show larger penes with apical portion slender), outer apical margin of penes smooth (with many small spines in C. demeni sp. nov.). Campsurus pedicellarius Spieth (1943) also presents similar genitalia, but the main lobe of penes is reduced in size and rounded, and the sternum IX presents a strong median incision ( Traver 1947, Domínguez et al. 2006). In time, both of these characters may prove to be mounting artifacts, and thus C. lucidus and C. pedicellarius might be synonymous. The extremely projected paraprocts (not reported in C. pedicellarius , but probably present) are shared only with C. demeni sp. nov., C. sinamari sp. nov., C. indivisus and C. inusitatus sp. nov.

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.