Dolichogyna (Nosodepus) pictus ( Philippi, 1865 )

Barahona-Segovia, Rodrigo M., Riera, Pamela, Pañinao-Monsálvez, Laura, Guzmán, Vicente Valdés & Henríquez-Piskulich, Patricia, 2021, Updating the knowledge of the flower flies (Diptera: Syrphidae) from Chile: Illustrated catalog, extinction risk and biological notes, Zootaxa 4959 (1), pp. 1-178 : 32

Dolichogyna (Nosodepus) pictus ( Philippi, 1865)

Figs 37–38

Helophilus pictus Philippi, 1865: 743

Tubifera picta Kertész, 1910: 259 *

Dolichogyna (Conocotamyia) picta Fluke, 1951a: 474

Type locality and data. “ Chile ” (T, ♀, MNHNCL) .

Material examined. Arica y Parinacota:Arica, 4500 m, II.1948, Leg. NN ( Fluke 1951a); Parinacota ( Etcheverry 1963); Antofagasta: 1♀, Mucar, 18.I.1967, Leg. L.E. Peña ( MEUC); Lever ( Etcheverry 1963); Loyoquis ( Etcheverry 1963).

References. Philippi, 1865: 743 (desc.); Williston, 1886: 321 (cat.); Reed, 1888: 298 (cat.); Kertész, 1910: 259 (cat.); Shannon & Aubertin, 1933: 164–165 (desc. & key); Ruiz & Stuardo, 1935: 318 (natural history); Sack, 1941: 111 (cat.); Stuardo, 1946: 129 (cat.); Fluke, 1951a: 475, fig. 7, 20 & 27 (desc.); Etcheverry, 1952: 308 (cat.); Fluke, 1957: 122 (cat.); Etcheverry, 1963: 32 (cat.); Thompson et al., 1976: 46.98 (cat.); Camousseight, 2005: 93 (cat.).

World distribution. Argentina and Chile.

Chilean distribution. From Arica y Parinacota to Antofagasta region ( Fig. 39 ).

Altitudinal range. Recorded only in highlands ecosystems (3,000 –4,000 m.a.s.l.).

Biology and notes. A native species that inhabits highlands mainly associated with salt lakes and wetlands. Habitat loss, pollution and climate change probably are the main drivers of its decline. This species has not been collected since the 1960s, and all basic aspects of its biology and ecology remain unknown in Chile.

Conservation status. EN under B2ab (iii) using AOO = 20 km 2 and five localities (or subpopulations); EOO = 31,851 km 2.

Figures

FIGURE 39. Distribution map of Dolichogyna species in Chile: D. abrupta Hine, 1914 (Blue circle); D. chilensis Walker, 1836 (red circles); D. hinei Fluke, 1957 (black circles); D. nigripes Bigot, 1884 (green circles); D. pictus (Philippi, 1865) (yellow circles); D. pennipes (Sack, 1941) (violet star) and D. reynoldsi Shannon & Aubertin, 1933 (violet circles).

FIGURES 35–38. Dolichogyna nigripes Bigot, 1884: (35) dorsal view (photo by Patricia Henríquez); (36) in situ in a ‘Margarita’ (Chrysantemum sp.), Aysén (Photo by Patricia Medina). Dolichogyna pictus (Philippi, 1865): (37) female, head and (38) female, lateral view. All scale bars = 1 mm.