Pelecorhynchus hualqui Llanos & González, 2015

Llanos, Lorena, Gonzalez, Christian R. & Córdoba, Mónica Saldarriaga, 2015, Revision of the New World species of the genus Pelecorhynchus Macquart, 1850 (Diptera: Pelecorhynchidae), Zootaxa 3955 (2), pp. 188-210 : 195-198

Pelecorhynchus hualqui Llanos & González sp. nov.

( Figs. 16–25 )

Type material. Holotype: Chile, Región del Bío-Bío: 1♀ Concepción, Hualqui , 30.XII.2006 col. S. Rothmann. Paratypes: Chile, Región de Valparaíso: 1 ♂ Valparaíso, Quintero XII.1934; Región del Maule: 1 ♀ Linares, Rari, col. R. H. González; Región del Bío-Bío: 1 ♂ Ñuble, Chillán, Los Lleuques 3.I.1996 col. S. Roitman; 2 ♂ Ñuble, Chillán, Los Lleuques 11.I.1996 col. S. Roitman; 1 ♂ Ñuble, Chillán, Los Lleuques 7.I.1996 col. S. Roitman; 1 ♂ Concepción, Chome, Playa El Burro sin fecha col. R. Barahona; 1♂ Concepción, Hualqui , 12.I.2001 col. J. Rothmann; 1 ♀ Concepción, Hualqui , 6.I.2004 col. J. Rothmann; 1 ♂ Concepción, Hualqui , 23.I.2006 col. S. Rothmann; 1 ♀ Concepción, Los Queles 24.I.2008 col. J. Rothmann; 1♂ Concepción, Los Queles 9.I.2010 col. S. Rothmann; 1♀ Concepción, Los Queles, I.2012 col. A. Rothmann; 1♀ Concepción, Los Queles, I.2012 col. S. Rothmann. Additional material: 1 ♂ Región de La Araucanía: Cautín, Toltén 20.I.1955 Col. H. Toro; 1 ♀ Malleco, Angol 8.XII.1949 Col. L. Cisternas. Holotype in Unidad Entomología, Servicio Agrícola y Ganadero ( SAG), Santiago, Chile. Paratypes in Instituto de Entomología collection, Universidad Metropolitana de Ciencias de la Educación, Santiago, Chile.

Diagnosis and comments. Body color black. Scutum black with two parallel longitudinal yellowish stripes. Scutellum black with black hairs on the distal margin. Pleura with long abundant black hairs. Wing infuscated orange. Abdomen black. Tergites 2 and 3 each with a pair of lateral small whitish spots, not reaching the margin ( Fig. 16 ). Tergite 4 without spots. P. hualqui is close to P. longicauda as both species have the pleura and the distal margin of scutellum with black hairs. However, it differs in that the white spots on the tergites and sternites are smaller, tergites 3 and 4 without white spots, and sternites 3 and 4 without lateral white spots. It is also is close to P. xanthopleura but differs in the color of the pleural hairs.

Description. Female (N = 7; length = 19.0 – 20.5 mm). Head: eyes dark blackish brown without color pattern when dry, bare ( Fig. 17 ). Frons with blackish brown pruinosity, with short black hairs, parallel-sided ( Fig. 17 ). Parafacial with gray pruinosity and short black pilosity. Ocellar triangle black, without hairs and with three ocelli. Posterior border of head with dark gray pruinosity and short black hairs; vertex with short black hairs. Clypeus convex with black pruinosity and long black hairs. Gena with black pruinosity and long abundant black hairs continuous with those of the occiput; beard with long and abundant black pilosity. Scape and pedicel dark brown pruinose with black hairs; first flagellomere blackish-brown, larger than apical flagellomeres; apical flagellomeres blackish, conical. Maxillary palpus dark brown with abundant, short black hairs. Proboscis and labellum blackishbrown.

Thorax: Scutum black with sparse, short black hairs and two longitudinal yellowish stripes. Scutellum black with black hairs on distal margin. Pleura black pruinose, with long, abundant, black hairs. Legs dark brown. Coxa blackish-brown with black hairs. Wing infuscated orange.

Abdomen: black dorsally, shining with sparse black hairs on all tergites; tergites 2 and 3 each with a pair of lateral small whitish spots, not reaching the margin; tergite 4 without spots. Sternite 2 with small white spots near the lateral margin; sternites 3 and 4 without spots.

Male (N = 10; length: 15.0 – 17.0 mm). Head: eyes black, bare, holoptic. Ocellar triangle elevated with three ocelli, with black hairs. Posterior border of the head with black pruinosity; vertex with short and black hairs. Clypeus convex with black pruinosity, and long and abundant black hairs ( Fig. 18 ). Gena with black pruinosity and long abundant black hairs continuous with those of the occiput and beard with long black hairs. Scape semiglobose, with blackish brown pruinosity and black hairs. Pedicel with blackish brown pruinosity with sparse black hairs; first flagellomere blackish brown; apical flagellomeres of the same color, sharp and tapering towards the apex. Maxillary palpus black, with abundant pilosity black ( Fig. 18 ). Proboscis and labellum blackish brown.

Thorax: scutum black with sparse black hairs; with two parallel longitudinal yellowish stripes. Scutellum black with thick black hairs on distal margin ( Fig. 19 ). Pleura black pruinose with long black hairs. Legs dark brown ( Fig. 20 ). Coxa blackish-brown with black hairs. Wing infuscated orange, especially along costal margin ( Fig. 21 ).

Abdomen: black dorsally, shining with sparse black hairs on all tergites ( Fig. 22 ); tergites 2 and 3 each with a pair of small lateral whitish spots, not reaching the margins, tergite 4 without spots. Sternite 2 with a pair of white spots not reaching the margin; sternites 3 and 4 without spots ( Fig. 23 ). Terminalia ( Fig. 24, 25 ). Cerci onesegmented and prominent, lobate, apically rounded with long abundant setae. Hypoproct about as long as wide, much longer than more dorsally situated cerci; posterior margin with a broad, shallow, v-shaped emargination. Epandrium large, rectangular and strongly arched, base width and with long setae laterally. Gonocoxite developed, large and curved, apically truncate, setose. Gonostylus pointed and sharp, setose dorsally, base very width; medial lobe very prominent and subquadrate. In dorsal view, aedeagus long and broad with two long hooks sharp, space between the hooks is broad.

Etymology. The specific name is a noun in apposition taken from type locality.

Geographic distribution. Chile (Región de Valparaíso to Región de La Araucanía) ( Fig. 26 ).

Figures

FIGURE 26. Geographic distribution of Pelecorhynchus hualqui sp. nov.

FIGURES 16 – 20. Pelecorhynchus hualqui sp. nov. 16. Adult male. 17. Head of female in frontal view. 18. Head of male in lateral view. 19. Thorax in dorsal view. 20. Thorax in lateral view. Scale bar = 1 mm.

FIGURES 21 – 25. Pelecorhynchus hualqui sp. nov.. 21. Wing. 22. Thorax and abdomen in dorsal view. 23. Abdomen in lateral view. 24. Epandrium and gonocoxites in ventral view. 25. Gonocoxites in dorsal view. Scale bar = 1 mm.