Atopophlebia pacis Salles, Marulanda & Dias, 2018

Salles, F. F., Marulanda, J. F. & Dias, L. G., 2018, Two new species of Atopophlebia Flowers, 1980 (Ephemeroptera, Leptophlebiidae) from Colombia, Zootaxa 4446 (1), pp. 138-150 : 139-140

Atopophlebia pacis Salles, Marulanda & Dias , sp. nov.

( Figures 1 to 12, 26 and 27)

Diagnosis. The male imago of Atopophlebia pacis , sp. nov., can be distinguished from the other species of the genus by the following combination of characteristics: 1) Eyes meeting on meson of head; 2) Fore wings hyaline, veins yellow ( Fig. 2 ); 3) Fore tibia completely tinged with black; 4) Abdominal segments yellowish, terga VIII with conspicuous triangular anterolateral black mark ( Fig. 1 ); 5) Apical projection of penis lobe short ( Fig. 4 ). The nymph can be distinguished from the other species of the genus by the following combination of characteristics: 1) Labial palp segment I strongly widened, 0.7 times as wide as long ( Fig. 10 ); 2) Abdominal color pattern as in male imago ( Fig. 5 ).

Description of male imago (in alcohol). Lengths: body: 7.25 mm; fore wings: 7.6 mm; hind wings: 1.0 mm.

General coloration: yellowish.

Head: Eyes meeting on meson of head. Head yellowish orange. Lateral ocellus surrounded with black. Upper portion of turbinate eyes orange, lower portion dark grey.

Thorax: General color yellowish with three black lines in the pronotum mid-part; pleural sclerites washed with dark grey. Forewing ( Fig. 2 ): maximum width 0.4 times maximum length; membrane hyaline, veins yellow; vein MP2 attached at base to MP1; IMP attached at base to veins MP1 and MP2. Hind wing ( Fig. 2 ) base pigmented with gray; costal projection located on apical 0.65, apex of wing roundly acute; 3 cross veins present. Fore femur orange; fore tibia completely tinged with black. Middle and hind legs orange; middle and hind tibiae washed with brown. Patella-tibial suture absent on all legs.

Abdomen: yellowish with intersegmental membrane between segments I to VIII tinged with diffuse black; terga I with lateral margin tinged with diffuse black, terga VIII with black anterolateral triangular mark and anteromedial black spot ( Fig. 1 ). Abdominal sterna pale yellowish; subgenital plate and forceps yellow ( Figs. 3 and 4 ). Penes fused in basal 1/3 with lobes 0.3 times as wide as long; each lobe with an apical short projection directed ventro-laterally ( Figs. 3 and 4 ). Cerci and terminal filaments brownish tan.

Description of nymph (immature). Head: yellowish brown, vertex diffusely tinged with black; area anterior to median ocellus yellow, triangular ( Fig. 5 ). Labrum ( Fig. 6 ) with lateral margins slightly angled, distal margin with broad and flat denticles, except for the median denticle, which is narrower and rounded apically ( Fig. 7 ). Mandible ( Fig. 8 ) diffusely tinged with black on exposed dorsal surface. Maxilla ( Fig. 9 ) with outer margin of stipe tinged with black. Hypopharynx with apex of superlingua strongly curved. Labium ( Fig. 10 ): labial palp segment I strongly widened, 0.7 times as wide as long.

Thorax: yellowish brown with black marks on anterior and lateral margins of mesonotum ( Fig. 5 ). Legs ( Figs. 11 and 12 ) yellowish white; fore femur with subapical pale brown mark; mid femur missing; hind femur almost completely pigmented by pale brown. Foreleg ( Fig. 11 ): femur with outer margin with row of long and fine setae along distal ¾ and row of spatulate setae, little shorter than fine setae, on distal ½; anterior surface with few short blunt setae on distal ½. Hind leg ( Fig. 12 ): femur with few fine setae on outer margin, spatulate setae present from base to apex; anterior surface with short blunt setae more numerous and more spread than in foreleg; tibia with few spatulate setae on outer margin. Tarsal claws with a row of 5–8 denticles, the apical denticle larger than the others.

Abdomen: yellowish brown with black markings as in male imago, except that segment II is tinged as segment I and conspicuous marks on segments VIII are also present on segment VII ( Fig. 5 ). Gills grayish, tracheae black, a large basal lobe on inner lamella; seventh gill much reduced. Caudal filaments yellowish.

Etymology. The epithet of the new species is derived from the latin word for peace and is a reference to the peace process between the Revolutionary Armed Forces of Colombia (FARC) and the Colombian government. Thanks to that, this taxon could be finally collected, identified as a new species and properly described.

Life cycle association. Nymphs and adults were collected in the same area and both share the same and conspicuous abdominal color pattern.

Distribution. Colombia, Putumayo: Puerto Asís and Mocoa ( Figs. 28 and 29 ).

Material examined. HOLOTYPE ♂ imago: Colombia, Putumayo, Mocoa, Quebrada Canalendre , 1° 07’ 39.7’’ N, 76° 37’ 48.0’’ W, Dias , Rodríguez , Ospina , Rozo , Cárdenas & Romero cols., 16/xii/2015 ( UFVB).

PARATYPES. 1 nymph, same data as holotype. 2 ♂ imagos, Colombia, Putumayo, Puerto Asís, Quebrada Aguas Negras, 0° 31’ 36.3’’ N, 76° 31’ 38.3’’ W, Dias , Rodríguez , Ospina , Rozo , Cárdenas & Romero cols., 20/xii/ 2015 (all in CEBUC).

Figures

FIGURES 1–5. Atopophlebia pacis sp. nov., male imago (1 to 4) and nymph (5): 1) dorsal view of abdomen; 2) forewing and hind wing; 3) genitalia, dorsal view; 4) genitalia, lateral view; 5) habitus.

FIGURES 6–12. Atopophlebia pacis, sp. nov., mouthparts (6 to 10) and legs (11 and 12) of nymph: 6) labrum; 7) detail of distal margin of labrum; 8) left mandible; 9) maxilla; 10) labium; 11) fore leg; 12) hind leg.

FIGURES 28–29. Distribution of the known species of Atopophlebia: a) map of South America showing the distribution of all the species; b) detail of the species reported from Colombia. Solid lines, country limits.