Dolichogyna (Dolichogyna) chilensis ( Guérin-Mèneville, 1835 )

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 : 29

Dolichogyna (Dolichogyna) chilensis ( Guérin-Mèneville, 1835)

Figs 31–32

Helophilus chilensis Guérin-Mèneville, 1835: 545

Dolichogyna fasciata Macquart, 1842: 126

Helophilus hahni Bigot, 1888: 24

Type locality and data. “ Chiloé , Chile ” (T, A, BMNH) .

Material examined. Arica y Parinacota: 1♂, Timar , 6.XI.1980, Leg. G. Díaz P. ( UTA) ; 1♂, Chapiquiña , 17.VII.1976, Leg. G. Díaz P. ( UTA) ; 1♂, 1♀, Putre , VI.1979, Leg. G. Díaz P. ( UTA) ; Valparaíso : 1♂, Mantagua , 14.I.1973, Leg. Cerda ( MNHNCL) ; 1♂, Caleta Higuerillas , 14.X.1963, Leg. Hichins ( MNHNCL) ; 1♂, San Pedro, Quillota , 24.IV.1966, Leg. Cerda ( MNHNCL) ; 1♂, Viña del Mar , 02.II.1975, Leg. G. Cerda ( MNHNCL) ; 1♂, El Salto, 08.V.1963, Leg. Hichins ( MNHNCL) ; Metropolitana : 1♂, 1♀, Rinconada de Maipú , 12.X.1969, Leg. L. Álvarez ( MEUC) ; 1♀, Renca , no date, Leg. A. Faz ( CNC) ; 1♂, Pudahuel , 29.I.1951, Leg. L. Peña ( CNC) ; 4♂, 2♀, Santiago , no date, Leg. R. Cortés ( INIA) ; Maule : 1♂, Laguna del Maule norte, 15–16.I.1968, Leg. L.E. Peña ( MEUC) ; 1♀, Constitución , 26.XI.1963, Leg. ( CNC) ; Biobío : 1♂, Dichato , 20.XII.1953. Leg. L. Peña ( CNC) ; 4♂, Desembocadura río Bio bío, 22.XI.1970, Leg. J. W. Boyes ( CNC) ; 1♂, San Pedro de la Paz, 25.II.1975, Leg. Cerda ( MNHNCL) ; 1♂, Caramávida , 25.XII.1952, Leg. L. Peña ( CNC) ; 1♂, Cayucupil , 12.I.1954, Leg. L. Peña ( CNC) ; La Araucanía: 1♂, Cerro Ñielol , 3.X.1998, Leg. B. Guiñez ( INIA) ; Los Ríos: 1♀, Valdivia , 20.X.1970, Leg. J. W. Boyes ( CNC) ; 2♂, 1♀, Pucatrihue costa, II.1968, Leg. Salgado ( MEUC) ; Los Lagos: 1♂, Paso Puyehue , 23.II.1992, Leg. Cerda ( MNHNCL) ; 1♂, Lago Chapo , 28.II.1983, Leg. G. Arriagada ( MNHNCL) ; 4♂, 10♀, Dalcahue , no date, Leg. L. Peña ( CNC) ; 1♂, 8♀, Melinka , 28–31.I.1962, Leg. L. Peña ( CNC) ; Aysén : 1♂, Mañihuales , 12.III.1994, Leg. G. Cerda ( MNHNCL) ; Magallanes : 1♂, Isla Riesco , 08.XII.1979, Leg. M. Cerda ( MNHNCL) ; 3♂, 3♀, Punta Arenas , 30.XII.1968, Leg. V. Pérez ( MNHNCL) ; 8♂, 4♀, Laguna Amarga , 14.XII.1960, Leg. L. Peña ( CNC) ; 1♂, San Juan , Magallanes, 04.I.1970, Leg. Cerda ( MNHNCL) .

References. Guérin-Mèneville 1835: 545, fig. 2 (desc.); Walker, 1836: 344 (desc.); Blanchard, 1852: 408 (desc.); Blanchard, 1852. Plate 4, fig. 8 (desc.); Philippi, 1865: 744 (desc.); Williston, 1886: 320 (cat.); Bigot, 1888: 24 (desc.); Reed, 1888: 298 (cat.); Lynch Arribálzaga, 1892: 236 (cat.); Lynch Arribálzaga, 1893: 261, fig. 11 (cat.); Porter, 1897b: 43 (cat.); Hine, 1914: 343 (desc. & key); Porter, 1921: 447 (cat., dist. & notes); Porter, 1924: 98 (cat.); Shannon & Aubertin, 1933: 164–165 (desc.); Sack, 1941: 109 (cat.); Stuardo, 1946: 128 (cat.); Hull, 1949b: 386 (desc.); Fluke, 1951a: 467, fig. 1–2, 11–12, 19, 22 (desc); Fluke, 1957: 121 (cat.); Etcheverry, 1963: 29 (cat.); Goot, 1964: 216 (cat.); Thompson, 1972b: 134 ( Milesiinae rev.); Thompson et al., 1976: 46.97 (cat.); González & Coscarón, 2005: 347 (distr.); Smith-Ramírez et al., 2005: 412 (pollinator study); Smith-Ramírez et al., 2014: 6 (ecological study, supplementary material); Marín-Armijos et al., 2017: 169 (cat.).

World distribution. Argentina, Ecuador, Peru and Chile.

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

Altitudinal range. 5– 4,000 m.a.s.l.

Biology and notes. Fluke (1951) indicates that Dolichogyna chilensis is a native species that also inhabits Argentina and Peru. Marín-Armijos et al. (2017) also recorded it in Ecuador. The species visits flowers of Tepualia stipularis (Hook & Arn.) Griseb. , ( Smith-Ramírez et al., 2005) as well as other herbaceous plants, exotic and native trees such as E. cordifolia (R. Barahona-Segovia, pers. obs.). This species has also been recorded visiting the exotic Brassica rapa L. (Ricardo Huenuanca, CSP record); Euryops pectinatus (L.) Cass. (Gustavo Lezana, Norka Contreras, Peter Lewis and Yanira Venegas CSP records); Prunus sp. (Frank Montes, CSP record), Taraxacum officinale L. (Patricia Medina, CSP record), Ranunculus sp. (Norka Contreras, CSP record) and the native shrubs as Berberis sp. (Fernando González, CSP record) or Buddleja globossa Hope (Manuel Gedda, CSP record).

Conservation status. LC; EOO = 690,143 km 2; AOO = 112 km 2, 24 subpopulations and 26 localities.

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 29–34. Dolichogyna abrupta Hine, 1914: (29) female, head and (30) female, dorsal view. Dolichogyna chilensis Walker, 1836: (31) male, head and (32) male, dorsal view- Dolichogyna hinei Fluke, 1957: (33) female, head and (34) female, dorsal view. All photos by Vicente Valdés. All scale bars = 1 mm.