Hagenulopsis Ulmer

Domínguez, Eduardo, Molineri, Carlos & Mariano, Rodolfo, 2009, Revision of the South American species of Hagenulopsis Ulmer and Askola Peters (Ephemeroptera: Leptophlebiidae) with description of six new species, Zootaxa 2142 (1), pp. 29-44 : 36

Hagenulopsis Ulmer

Hagenulopsis Ulmer, 1920: 34 ; Needham & Murphy, 1924: 43; Traver, 1946: 427; Peters, 1969: 258; Edmunds, Jensen & Berner, 1976: 221; Peters & Domínguez, 2001: 353. (Type-species: Hagenulopsis diptera Ulmer ).

Discussion: Hagenulopsis Ulmer can be separated from the other genera of the family by the following combination of characters, in the adult: 1) hind wings absent; 2) MA fork symmetrical or asymmetrical, MP fork symmetrical; 3) vein ICu1 of fore wings attached at base to vein CuP ( Figs. 37–39 ); 4) tarsal claws of a pair dissimilar, one apically pointed, other blunt; 5) penes divided, tubular, apically acute, with two small ventral spines located between 1/5–1/3 distance from apex; 6) inner angle of forceps segment I located about 1/2–1/3 distance from base; 7) female with well developed egg guide, which is prolonged to middle of abdominal sternum IX; and 8) female sternum IX deeply cleft apically. In the nymph: 1) labrum with rounded margins, and anteromedian emargination with 3–5 denticles; 2) mandible with few or no setae on apical third of outer margin; 3) apical 1/2 of segment III of labial palpi constricted; 4) denticles of tarsal claws progressively larger toward apex, except apical denticle much larger; 5) gills on abdominal segments I–VII lanceolate, narrow, dorsal and ventral portions similar; 6) posterolateral spines on abdominal segments VI–IX, larger posteriorly, only slightly developed in IV and V.

The generic description needs to be amended with the following characters to include the variations reported for the new species: In the imago, 1) penes divided, tubular, apically acute, with two small ventral spines located between 1/5–1/3 distance from apex; 2) inner angle of forceps segment I located about 1/2–1/3 distance from base. In the nymph, 1) labrum with rounded margins, and anteromedian emargination with 3–5 denticles.

Lugo-Ortiz & McCafferty (1996) separated one of the two species they described from nymphs, mainly on the presence of branched setae on the distal end of hind tibiae. The nymphs we are describing and H. diptera we studied (from Sao Paulo) have only simple setae on hind tibiae .

Figures

FIGURES 37–47. Hagenulopsis. Figs 37–39, male fore wing: 37, H. zunigae sp. nov.; 38, H. esmeralda sp. nov.; 39, H. lipeo. Fig. 40, H. zunigae sp. nov., genitalia, ventral view. Figs 41–42, H. esmeralda sp. nov.: 41, genitalia, ventral view; 42, penes, detail. Figs 43–46, H. lipeo: 43, genitalia, ventral view; 44, penes, detail; 45, apex of styliger plate, ventral view; 46, idem, variation. Fig. 47, H. diptera, male head, dorsal view.