Campsurus cristales, Molineri & Granados-Martinez, 2019

Molineri, Carlos & Granados-Martinez, Cristian E., 2019, Two new species of Campsurus Eaton (Ephemeroptera: Polymitarcyidae) from Colombia, Zootaxa 4543 (1) : -

Campsurus cristales sp. nov.

( Figs. 1 D–G, 4A–E)

http://zoobank.org/NomenclaturalActs/ 418316B8-092E-4C03-960C-DF24C22F8EC2

Diagnosis. Campsurus cristales sp. nov. is described from male and female adults. It can be distinguished from other species of Campsurus by: 1) small to medium size (length of male FW 7.0–8.0 mm, female FW 10.7 mm); 2) posterior margin of male abdominal sternum IX tri–lobed ( Figs. 1D ); 3) pedestal almost touching each other medially at base, strongly elongated, parastylus broadly rounded apically, relatively wide and somewhat projected distally ( Fig. 1D , 4D ), inner corner rounded and slightly projected ( Fig. 1 D–4D); 4) penes with a strongly expanded dorsal area (ea in Fig. 4E ), main lobe sclerotized, long and relatively acute apically, secondary membranous lobe shorter, rounded apically and cylindrical ( Figs. 1 D–E, 4D–E).

Type material. Holotype ♂ imago from COLOMBIA, Meta, La Macarena, Pailones, Caño Cristales , N 2° 16' 4" / W 73° 46' 59", 257 m, 26.x.2016, light trap 18–20 hs, C Granados col. (MUSENUV) . Paratypes: 16 ♂ imagos (1 on slide IBN803 CM) and 1 ♀ imago (slide IBN804 CM) , same data as holotype (8 ♂ and 1♀ in IBN, 4♂ in MUSENUV, 4♂ in CEBUC) .

Male imago. Length (mm): body, 7.2–7.7; fore wing, 7.0–8.0; hind wing, 3.5–4.0; fore leg, 3.5–4.2; cerci, 20.0–21.0. General coloration yellowish white, widely shaded with gray ( Fig. 4A ). Head completely shaded with black dorsally, and on antenna (except for hyaline flagellum), ventrally with gray marks along carinae. Thorax ( Fig. 4A, 4C ). Pronotum translucent, extensively shaded with black, darker on anterior portion, medial line, and margins; prosternum yellowish white. Mesonotum yellowish, shaded with gray medially on parapsidal sutures, and on a triangle between PSP; pleura and sterna yellowish white, shaded with slightly gray. Metanotum yellowish white, shaded with gray medially. Meso furcasternal plates as in Fig. 4C . Legs. Fore leg completely shaded with gray; middle and hind legs yellowish translucent, shaded completely with gray. Wings. Membrane hyaline, except C and Sc areas shaded with brownish gray, veins hyaline, except C, Sc, and R 1 brownish on basal 2/3. Hind wing hyaline, except base of veins yellowish. Abdomen ( Fig. 4A ) whitish translucent, extensively shaded with gray on terga, except on small paler dots. Abdominal sterna translucent white, shaded with gray on medial line of sterna VII–IX. Genitalia ( Figs. 1 D–E, 4D–E)): yellowish white; sternum IX with three slightly marked lobes on hind margin (arrows in Figs. 1D ), medial line and hind margin black; pedestal of each side touching basally, with apically rounded parastylus (mo in Fig. 4D ), round inner corner small, slightly projected (mi in Fig. 4D ); forceps short and translucent, shaded with gray basally; base of main lobe of penes sclerotized, very expanded dorsally (ea in Figs. 4 D–E), apical portion narrowing abruptly and finger like, main lobe sclerotized and acute apically, secondary lobe membranous and rounded apically, slender and cylindrical. Caudal filament hyaline translucent.

Female adult. Length (mm): body, 8.0; fore wing, 10.7; hind wing, 4.5; fore leg, 1.2; cerci broken. Similar to male imago, except pigmentation more heavily marked ( Fig. 4B ). Thorax. Pronotum shaded with gray, except pale transverse line between anterior and posterior portions; thin black medial line surrounded by a pale area along anterior portion of pronotum. Mesonotum ( Fig. 4B ) additionally shaded gray on anterior triangular mark (after mesonotal protuberance). Legs shaded completely with gray. Wing membranes yellowish translucent. Abdomen shaded extensively with black on dorsum ( Fig. 4B ); sternum VIII with small anteromedian subovate socket ( Figs. 1 F–G). Caudal filaments translucent whitish.

Egg. Length, 275–300 µm; width, 225–250 µm. Oval, cup–shaped, yellowish with whitish polar cap.

Etymology. The name alludes to the type locality (Caño Cristales).

Distribution ( Fig. 5 ). Colombia (Meta).

Discussion. Campsurus cristales sp. nov. is very similar to C. janae Molineri & Salles , and will key to that species in Molineri & Salles (2017). Nevertheless, the pedestals are broader and parastylus more projected distally in the new species. Also, the penes are even more expanded in a dorsal ovate flat structure (ea in Figs. 4 D–E), which is more circular in C. janae . Additionally, the main lobe of penes in the new species is longer and apically acute (it is shorter and rounded in C. janae ). Finally, the tri–lobed hind margin of the sternum IX is unique for the new species.

Figures

FIGURES 1A–G. Campsurus vichada sp. nov.: A, male genitalia, v.v.; B, female sternum VIII, C, same, detail of sockets. Campsurus cristales sp. nov.: D, male genitalia, v.v.; E, same, l.v.; F, female sternum VIII, G, same, detail of sockets.

FIGURES 4A–E. Campsurus cristales sp. nov.: A, male imago, d.v.; B, female imago, d.v. (PSP= Postero Scutal Protuberances); C, male imago, v.v. (mfp= mesofurcasternal plates); D, male genitalia, v.v.; E, same, l.v. (ea ear–like projection; im= inner projected margin of pedestal; ml= main lobe; om= outer projected margin of pedestal; sl= secondary lobe.

FIGURE 5. Map indicating the distributional records of the new species.