Haplohyphes baritu Domínguez

Molineri, Carlos, 2003, Haplohyphes (Ephemeroptera: Leptohyphidae), new species and stage descriptions with a key to separate the species of the genus, Zootaxa 263, pp. 1-11 : 4-5

Haplohyphes baritu Domínguez ( Figs. 9­19 , 42 ­45)

H. baritu Domínguez, 1984: 106 ; Domínguez et al. 1994: 97; Lugo­Ortiz & McCafferty 1995: 169; Molineri 1999: 29.

Haplohyphes furtiva Domínguez, 1984: 108 . SYN. NOV. H. furtiva Domínguez et al. 1994: 98 ; Molineri 1999: 29. H. furtivus Lugo­Ortiz & McCafferty 1995: 169 .

Egg ( Figs. 42 ­45). Length, 110­130 µ; maximum width, 65­75 µ. One blunt polar cap present ( Figs. 42­43 ). One subcircular micropylar area, surrounded by five chorionic plates (Fig. 45). Polygonal chorionic plates (Figs. 44­45) contiguous; with the margin opposed to capped pole, elevated. Adhesive filaments (probably derived KTC) relatively long and thin (Fig. 44), sometimes widening at the apex very slightly, scattered on chorionic surface.

Material. Haplohyphes baritu : holotype male subimago, allotype female subimago and 28 paratype nymphs from ARGENTINA: Salta, Santa Victoria, Parque Nacional Baritu , arroyo Baritu, 1500 m , 10­17/X/1981, E. Domínguez Col. Haplohyphes furtiva : holotype male imago and 15 paratype male imagos from ARGENTINA, Salta, Anta, Parque Nacional El Rey, arroyo Las Salas, 25/IV/1982, E. Domínguez Col.; allotype female imago and 1 nymph, idem except date, 20/XII/1981. Other material. ARGENTINA: Salta, P. N. El Rey, arroyo Los Puestos, 24­25/III/1999, C. Molineri Col. (19 male imagos, 5 female imagos, 2 reared female subimagos, 5 nymphs); Salta, Santa Victoria, Los Toldos, río Huaico Grande, 26/X/1999, C. Molineri Col. (5 male and 4 female imagos, eggs extracted from one of these females); Jujuy, río Yala, 26/VI/1997, C. Molineri Col. (25 nymphs); Jujuy, El Carmen, arroyo Las Lanzas, S 24º 27' 17" ­ W 65º 17' 48", 1250 m, 3/ III/2000, E. Domínguez & C. Molineri Cols. (13 male and 7 female imagos, 1 nymph). BOLIVIA: dept. La Paz, stream near Caranavi, S 15º 36' 27" ­Wº 67 45' 58", 27/XI/2000, E. Domínguez, C. Molineri y C. Nieto Cols. (24 nymphs); dept. La Paz, Reserva Carrasco, S 15º 43' 09" ­ W 67º 31' 06", 940 m, 29/XI/2000, E. Domínguez, C. Molineri y C. Nieto Cols. (6 male and 3 female imagos, 14 nymphs). All the material is housed in IFML, except 15 nymphs, 3 male and 1 female imagos in UMSA.

Discussion. Domínguez (1984) described Haplohyphes baritu from adults of both sexes and nymphs. Adults were described as imagos but all the type material is represented by subimagos. The characters used to distinguish this species from Haplohyphes furtiva are attributable to stage differences (dissimilar fore tarsal claws and division of penes). New material from all the stages collected at or near the type localities of both species show them to be synonyms. Haplohyphes furtiva is considered junior synonym of H. baritu due to page priority. Haplohyphes baritu is recorded from Bolivia for the first time.

The eggs of Haplohyphes baritu show similarities with those known for some species of Tricorythodes Ulmer ( T. griseus Hofmann & Sartori , T. hiemalis Molineri , unpubl), showing similar chorionic sculpture and adhesive filaments. Other genera of Leptohyphidae ( Allenhyphes Hofmann & Sartori , in Hofmann et al 1999; Traverhyphes Molineri 2001 ; Leptohyphes Eaton , in Molineri 2003) show adhesive filaments much shorter, widened at the apex. This suggest a closer relationship between Haplohyphes and Tricorythodes than previously accepted ( Wiersema & McCafferty 2000), situation supported also by other morphological characters in gills and legs ( Molineri 2002).

Haplohyphes baritu can be distinguished from the other species of the genus by the following combination of characters: 1) three longitudinal veins present on hind wings ( Figs. 10 b­c); 2) segment 1 of forceps as long as or longer than segment 2 ( Fig. 12 ); 3) penes divided on apical 0.23­0.26 ( Fig. 11 ); 4) membranous lobes of penes obliquely truncated at apex ( Fig. 11 ); 5) apical spines of penes shorter than membranous lobes; 6) male fore wing length, 5.0­ 7.2 mm; 7) abdomen uniformly shaded with gray. In the nymphs: 1) fore wingpads shaded with black on basal half of costal margin; 2) head shaded with gray as in Fig. 13 . Abdominal gills are illustrated for comparative purposes ( Figs. 14­19 ).

Figures

FIGURES 1 ­ 19. Haplohyphes aquilonius Lugo­Ortiz and McCafferty: 1 a, male fore wing; 1 b, male hind wing; 1 c, idem, detail; 2 a, female fore wing; 2 b, female hind wing; 2 c, idem, detail; 3, nymphal head, d. v.; 4, male genitalia, v. v. H. dominguezi sp. nov.: 5 a, male fore wing; 5 b, male hind wing; 5 c, idem, detail; 6, male genitalia, v. v. H. huallaga Allen: 7, male hind wing, detail. H. mithras (Traver): 8, male hind wing, detail. H. baritu Domínguez: 9 a, female fore wing; 9 b, female hind wing; 9 c, idem, detail; 10 a, male fore wing; 10 b, male hind wing; 10 c, idem, detail; 11, male genitalia, v. v.; 12, detail of forceps, l. v.; 13, nymphal head, d. v.; 14, gill II, d. v.; 15 ­ 19, gills II­VI, v. v.

FIGURES 42 ­ 43. Haplohyphes baritu Domínguez, SEM photographs: 42, group of eggs; 43, general view of egg; 44, a pair of eggs attached by adhesive filaments; 45, micropylar area. Scale bars = 10 µ.