Campsurus vulturorum, Emmerich, Daniel & Molineri, Carlos, 2011

Emmerich, Daniel & Molineri, Carlos, 2011, A new species of Campsurus (Ephemeroptera: Polymitarcyidae: Campsurinae) from Argentina and Uruguay and redescription of C. evanidus and C. jorgenseni with new synonymies, Zootaxa 2965, pp. 51-60 : 52-53

Campsurus vulturorum sp. nov.

Material. Holotype male Imago from Uruguay, Maldonado, Ruta 60, Km 23, Arroyo El Rodeo, S 34° 40' 20" W 55° 14' 15", 75 m, 4/III/08, at dusk, D. Emmerich & S. Pérez cols.; allotype female imago, same data as holotype. Paratypes: nineteen male imagos and 9 female imagos, same data as holotype. Five male imagos and 5 female imagos, same data as holotype except: 7/XI/08, D. Emmerich col.; one male and 1 female imagos, Uruguay, Treinta y Tres, Quebrada de los Cuervos, Arroyo Los Helechos, S 32° 55' 27.3" W 54° 27' 34.4", 125 m. 8/XI/04, at dusk, D. Emmerich & E. Morelli cols. One male imago and 1 female imago from Uruguay, Rivera, Santa Ernestina, Ruta 29, Arroyo sin nombre, near Mina Corrales, S 31º 32' 23.8" W 55º 33' 42", 146 m, 10/XI/2008, at dusk, D. Emmerich col. Two male subimagos Argentina, Misiones, Dpto Alem, 5 km W Cerro Azul, RN 14, Arroyo Mártires, 17/ XI/1998, E. Domínguez, C. Molineri, C. Nieto & M. Orce cols. Seven mature nymphs, Uruguay, Canelones, Carrasco, "lagunas areneras Minetti", 17/VI/51.

Depositories. Holotype and allotype, six male imagos, six female imagos, two male subimagos and three nymphs housed in IML (Instituto Miguel Lillo, Tucumán, Argentina); remaining material in MUR (Museo de la Facultad de Ciencias de la Universidad de la República, Uruguay).

Male imago. Length (mm): body, 16.0–21.5; fore wing, 15.9–20.5; hind wing, 7.0–9.5; cerci, 43.0–50.0; fore leg, 8.0–9.0. General coloration whitish with well-defined black markings. Head ( Fig. 1 ) whitish, completely shaded black dorsally; shading slightly more diffuse on occipute, except medial pale mark near hind margin. Antennae whitish, shaded slightly with purplish. Thorax. Pronotum whitish, except pronotal hump translucent; large medial area shaded with black except on posterior ¼; medial line on distal ½, hind margin and posterior half of lateral margin shaded black (lateral marks wider); prosternum translucent. Meso- and metanotum cream, shaded with black on carinae; transverse dash anterior to wing insertion and on a posterior V-shaped mark shaded diffusely with gray on mesoscutellum and around parapsidal sutures; rest of meso-and metathorax pale cream without marks ( Fig. 1 ); inner margins of furcasternal plates diverging on posterior ½. Legs: fore legs whitish, widely shaded with grayish purple (darker on tibiae), except on a pale dorsal mark on proximal third of femur; apices of tarsites paler ( Fig. 2 ); middle and hind legs whitish translucent. Wings. Membrane of fore wing ( Fig. 9 ) hyaline; C, Sc and R1 purplish, turning hyaline on distal half; remaining longitudinal and cross veins translucent hyaline; hind wing ( Fig. 10 ) veins translucent hyaline. Abdomen translucent whitish shaded with brownish gray on terga except medial line; terga II–VII with pale lateral dashes, terga VIII–X shaded widely except on a pair of submedian pale spots ( Figs 3– 4 ); abdominal sterna pale without shading, except a pair of small black dashes on sternum X. Genitalia ( Figs 11– 16 ): sternum IX whitish, slightly projected medially (arrow in Fig.12 ), pedestals whitish except posterolateral projection yellowish ( Figs 12, 16 ), forceps whitish, penes whitish except membranous ventral lobe hyaline and dorsal sclerotized portion (ventrally curved) yellowish ( Figs 13–15 ). Caudal filaments translucent whitish.

Female imago. Length (mm): body, 19.0–25.0; fore wing, 21.0–28.0; hind wing, 8.2–12.0; cerci, 6.7–7.2. General coloration similar to male ( Figs 5–8 ). Legs whitish shaded with purplish in fore femur and grayish on middle coxa ( Fig. 6 ). Mesopleura with small blackish mark ventrally to wing insertion. Wings membrane translucent slightly smoky yellow, costal area shaded with purplish almost entirely. Abdomen shaded darker and more widely with gray than in male; sternum X shaded black on anterolateral corners ( Figs 7–8 ). Sternum VIII on anterior margin with a pair of posteriorly divergent sockets ( Fig. 17 ).

Eggs. Maximum length, 330–355 µm; maximum width, 255–290 µm. Yellowish white, bowl shaped, oval, with a relatively large polar cap situated at the apex of the main axis ( Fig. 56 B).

Nymph. Length (mm). Male: body, 17.0; cerci, 17.0; caudal filament, 8.0. Female: body, 24,5–30.0; cerci, 9.0; caudal filament, 7,5–8.0. General coloration yellowish with brownish marks ( Fig.18 ). Head shaded with purplish brown between lateral ocelli and netted pattern on occipute ( Fig. 19 ). Mandibular tusks slightly curved dorsally at the apex, with numerous setae dorsally; inner margin with a prominent subbasal tubercle and 6 smaller more distal tubercles; outer margin of mandibles with 3–4 rows of stout spines and numerous setae ( Figs 20–22 ). Maxillae with a short ventral gill ( Fig. 23 ). Thorax. Pronotum whitish-yellow shaded with brownish as in male; prosternum translucent with a medial gray mark anterior to coxae; mesonotum extensively shaded with purplish brown, darker on posterior margin; wing buds translucent, shaded slightly with purplish on base, costal margin and main veins ( Fig. 19 ). Legs. Fore legs yellowish white; fore tibia-tarsus strongly flattened with a large dorso-distal projection ( Fig. 24 ), ventral surface with 4 rows of filtering setae: a basal transversal row, and three longitudinal rows ( Fig. 25 ), dorsal surface almost completely covered with short spines and simple setae; femur with anterobasal U-shaped row of filtering setae, and contiguously with a posterior elongated tuft of simple setae; dorsal margin of femur with posterobasal and distal tufts of setae ( Fig. 25 ). Middle and hind legs whitish yellow almost completely covered with yellowish setae. Abdomen whitish, shaded with purplish gray dorsally except on pale medial line, terga shaded mainly on submedian area and near posterior margin; terga III–VIII with pale semicircular sublateral marks, terga VIII–X shaded more extensively except on 1 or 2 pairs of sublateral pale marks ( Fig. 18 ). Gills. Abdominal gill I bilobed and translucent, gills II–VII shaded with purplish darker on trachea and posterior margin except articulation between basal and distal portions of dorsal lamellae pale; fringes whitish except on distal half of posterior margin light purplish at base. Caudal filament whitish.

Etymology. From the Latin word vulturus, plural genitive: vulturorum (= of the vultures). From the name of one of the localities “Quebrada de los Cuervos” where the species was collected.

Diagnosis and discussion. Campsurus vulturorum can be distinguished from all other species of the genus by the following combination of characters, in the adults: 1) posterior margin of male abdominal sternum IX convex, rounded ( Figs 11–12 ); 2) pedestals subrectangular, with a short projection on outer-posterior margin ( Figs 12, 16 ); 3) penes widely separated distally, each arm formed by two lobes, a larger sclerotized dorsal lobe, and a ventral smaller and membranous lobe ( Figs 13–15 ); 4) male gonopore large, clearly visible before an apical rounded ventral projection on the dorsal penean lobe ( Fig.14 ); 5) very large size (male fore wings 15.9–20.5 mm, female fore wings 21.0–28.0 mm); 6) blackish pigments strongly marked on head and pronotum, mainly on medial line and posterolateral margins of pronotum ( Figs 1, 5 ); 7) abdominal color pattern as in figures 3–4 and 7–8; 8) female sternum VIII with paired and posteriorly divergent sockets on anterior margin as in figure 17. In mature nymphs: 1) mandibular tusks robust with a large submedian tubercle and 6 subapical rounded denticles ( Figs 20–22 ); 2) maxilla with a short flat and triangular membranous gill on cardo ( Fig. 23 ). The association between adults and nymphs is tentative, based on shared color pattern, wing venation and genital rudiments.

Distribution. Uruguay and Northeastern Argentina (Misiones)

Figures

FIGURES 56 (A – C). Eggs and Polar Caps (Schematic drawing). A, Campsurus jorgenseni; B, Campsurus vulturorum; C, Campsurus evanidus.

FIGURES 1 – 17. Campusurus vulturorum sp. nov. Male and female imagos. Male. 1, Head and thorax d. v; 2, fore legs dorsolateral view; 3, Abdomen d. v; 4, Abdomen l. v; Female. 5, head and thorax d. v; 6, head, thorax and fore leg l. v; 7, abdomen d. v; 8, abdomen l. v; Male. 9, fore wing; 10, hind wing; 11, genitalia ventrolateral view; 12, genitalia v. v; 13, penes detail v. v; 14, penis dorsal lobe detail, v. v; 15, penis ventral lobe detail, v. v; 16, pedestal detail, v. v; 17, Female sockets, v. v.

FIGURES 18 – 25. Campsurus vulturorum, sp. nov. Nymph. 18, male and female nymphs (right mandibles were extracted), d. v; 19, head and thorax d. v; 20, right mandible, v. v; 21, right mandible tubercles, inner-ventral view; 22, right mandible, d. v; 23, right maxilla (detail of ventral gill), inner-ventral view; 24, right fore leg, d. v; 25, right fore leg, v. v.