Campsurus cuyuniensis Traver,

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: 312-314

publication ID

https://doi.org/10.11646/zootaxa.4300.3.1

publication LSID

lsid:zoobank.org:pub:554D8B46-D396-42FA-9604-6DA9DFA3EFE7

persistent identifier

http://treatment.plazi.org/id/0386A43A-EF7C-A23B-8B85-FB30FC95FB15

treatment provided by

Plazi

scientific name

Campsurus cuyuniensis Traver
status

 

Campsurus cuyuniensis Traver 

( Figs. 51–53View FIGURES 51 – 59)

Campsurus cuyuniensis Traver, 1947: 387  ; Domínguez et al., 2006: 569.

Type material. GUYANA: holotype ♂ i slide (wings) and paratype ♂ i slide (genitalia), both under the same number (N°2434, CUIC) from: between Camaria and Matope on the Cuyuni River , 23.vii.1924, swarming 4–5 pm, WA Myers col. 

Additional material. FRENCH GUIANA: 3 ♂ i from Sinnamary, riv. Saut Aimara, piège lum., 14.vi.1994, V. Horeau col. ( FAMU). The approximate coordinates of this locality are: N 5°4' / W 53° 3' ( Reynaud 1998)GoogleMaps  . BRAZIL: 2♂ i from RR, Boa Vista, río Cauamé , N 2° 49' 11" / W 60° 40' 24", 29.v.2009, Pennsylvania light trap, Fusari & Fernandes cols. ( CZNC)GoogleMaps  .

Male imago. Length (mm): body, 5.1–6.0; fore wing, 5.4–5.7; hind wing, 2.5; cerci, 16.5–17.5; fore leg, 2.6– 2.7. General coloration whitish yellow. Head yellowish shaded with gray dorsally, except along hind margin and small area among ocelli and base of antenna. Antennae yellowish white, shaded with gray. Thorax. Pronotum yellowish translucent, posterior margin grayish; prosternum and propleura pale almost without shading. Mesonotum yellowish shaded with gray on thin triangular anteromedian area and between PSP; pleura yellowish; mesofurcasternum shaded gray; metanotum and metasternum yellowish white. Legs. Fore leg yellowish white, shaded with gray on thin lateral strip on coxa, two longitudinal stripes on femur, entirely on tibia, but not at base of tarsomeres and claws; middle and hind legs yellowish translucent, shaded very slightly with gray. Wings. Membrane hyaline; veins Sc and R1 shaded gray, darker on basal 2/3, lighter toward apex; other veins yellowish translucent. Hind wing with base and Sc grayish, remaining veins translucent. Abdomen whitish translucent, widely shaded with gray on terga except on intersegmental membranes and pale lateromedian dash on terga III –VII and with pale mediolongitudinal line, terga VIII –X shaded more uniformly but with some pale spots and black dashes on IX. Abdominal sterna yellowish white, shaded very slightly with gray. Genitalia ( Figs. 51–53View FIGURES 51 – 59): sternum IX slightly shaded with gray posteromedially and along medial line (except thin medial line, pale), with medially concave hind margin ( Fig. 53View FIGURES 51 – 59); pedestal of each side touching basally, with large parastylus apically thinner and acute (best seen in lateral view), inner corner acutely projected ( Figs. 51View FIGURES 51 – 59); forceps short and whitish; base of penes pyramidal; main lobe of penes large and sclerotized, slightly curved ventrally and with acute apex curved ventrally outwards, secondary membranous lobe cylindrical and relatively long ( Fig. 53View FIGURES 51 – 59). Caudal filament translucent yellowish white.

Distribution ( Fig. 179View FIGURES 179). Guyana (orig.). New records: Brazil (RR), French Guiana.

Diagnosis. Campsurus cuyuniensis  can be distinguished from other species of Campsurus  , in the adult stage, by: 1) posterior margin of male abdominal sternum IX convex but medially concave ( Fig. 53View FIGURES 51 – 59); 2) pedestals long and slender, well-developed, outer-posterior margin strongly projected forming a long parastylus (apically pointed and curved in lateral view), inner margin also projected but shorter ( Figs. 51–53View FIGURES 51 – 59); 3) forceps are extremely shortened, thus total length of pedestal (from base to apex of parastylus) is subequal to total forceps length; 4) penes separated and subparallel, formed by a large dorsal sclerotized lobe with acute curved apex, and a relatively large ventral membranous lobe ( Fig. 53View FIGURES 51 – 59); 5) small size (length of male fore wings ca. 5.4–6.0 mm).

Discussion. Campsurus cuyuniensis  type slides include well-preserved male wings and damaged genitalia. Reliable characters to distinguish the species are found in the male genitalia, but in this case the penes are shrunken, hardly visible and had been separated from the pedestals during slide preparation. Features are visible on these pedestals, however, that positively allow new individuals (those from French Guiana listed above) to be assigned to C. cuyuniensis  : they are large, with parastylus well developed, but forceps are extremely shortened, thus total length of pedestal (from base to apex of parastylus) is subequal to total forceps length (in the type material the forceps are slightly shorter,but in the new material are slightly longer). Another unique characteristic of C. cuyuniensis  is the apical curvature of parastylus in ventral view ( Fig. 53View FIGURES 51 – 59), but this actually is the result of a dorsal curvature (better seen in lateral view). The penes of C. cuyuniensis  present long and slender lobes (main and secondary), similar to C. nessimiani  sp. nov., but in the latter species, the apex of the main lobe is spatulate (in lateral view), while in C. cuyuniensis  is acute and curved.

CUIC

Cornell University Insect Collection

PSP

Parasitic Seed Plants

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Ephemeroptera

Family

Polymitarcyidae

Genus

Campsurus

Loc

Campsurus cuyuniensis Traver

Molineri, Carlos & Salles, Frederico F. 2017
2017
Loc

Campsurus cuyuniensis Traver, 1947 : 387

Dominguez 2006: 569
Traver 1947: 387
1947