Syrphus reedi Shannon, 1927

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 : 145-146

Syrphus reedi Shannon, 1927

Fig. 203

Syrphus reedi Shannon, 1927: 27

Syrphus similis Blanchard, 1852: 410 Type locality and data. “ Chile Chico , Chile ” (T, ♂, USNM) .

Material examined. Arica y Parinacota: 1♂, Azapa , 21.XI.1967, Leg. G. Díaz P. (UTA) ; 1♂, Cica , 23.XI.1967, Leg. G. Díaz P. (UTA) ; 1♂, Lluta km41, 14.VIII.1967, Leg. R.M. (UTA) ; 1♂, Codpa , VII.1967, Leg. S. Cerda ( MNHNCL) ; Tarapacá: MiñiMiñi , 1650 m, 17.II.1948 ( Etcheverry 1952) ; Parca , 2930 m, 30.VII.1951 ( Etcheverry 1952) ; Valparaíso: 1♂, Hijuelas , 16.IV.1963, Leg.N.Hichins ( MNHNCL) ; 1♂, Bosque Relicto, Quintero , 27.VI.1966, Leg. C. Vivar ( MNHNCL) ; 1♀, Jardín Botánico Nacional , 12.VI.1967, Leg. C. Vivar ( MNHNCL) ; 1♀, Quebrada Vergara , 28.IX.1964, Leg. N. Hichins ( MNHNCL) ; 1♂, Playa Ancha , 19.VII.1964, Leg. N. Hichins ( MNHNCL) ; 1♂, Las Palmas, Quintero , 19.XII.1975, Leg. G. Cerda ( MNHNCL) ; Metropolitana : 1♂ , Santiago, 24.VIII.90, Leg. R. Trincado ( INIA) ; 1♂, La Castrina, Santiago, 30.X.1969, Leg. L. Alfaro ( MNHNCL) ; 2♂, Lo Aguirre , 12.II.2010, Leg. R. Trincado ( SAG) ; 1♀, Cerro San Cristóbal , 1.X.1962, Leg. NN ( MNHNCL) ; 1♂, Quebrada de Macul, 23.IX.1985, Leg. M. Cerda ( MNHNCL) ; 1♂, Ñuñoa , 30.X.1989, Leg. M. Cerda ( MNHNCL) ; O’Higgins: 1♂, Rancagua , 21.IV.1962, Leg. Solervicens ( MNHNCL) ; Maule: surround Reserva Nacional Los Queules ( Lander et al. 2009) ; Biobío: 3♂, 4♀ , Concepción, 15.XII.1955, Leg. J . Artigas ( MZUC) ; 1♂, Chiguayante , 10.V.1955, Leg. TRMV ( MZUC) ; 3♂, 3♀, Cholguán, 10.VI.1956, Leg. NN ( MZUC) ; 2♂, Andalién , 22.IV.1956, Leg. Parada ( MZUC) ; 1♂, San Pedro de la Paz, 25.XI.1956, Leg. Cid ( MZUC) ; 2♀, Quillón , 16.IX.1956, Leg. MGH ( MZUC) ; 1♂, 2♀, Rocoto, 14.XI.1956, Leg. Múñoz ( MZUC) ; La Araucanía: 1♂, Cerro Ñielol, 24.XII.90, Leg. B. Guiñez ( INIA) ; 1♀, Angol , 17.X.1945, R. Cuevas ( MNHNCL) ; 1♀, Lican Ray , 17.XI.1986, Leg. M. Cerda ( MNHNCL) ; 2♂, Temuco , 29.VIII.1986, Leg. R. Rebolledo ( UFRO) ; Los Ríos: 1♂, Llancacura, Valdivia , 13.I.1967, Leg. N. Hichins ( MNHNCL) ; 1♂, Valdivia , 19.XII.1988, Leg. Khramer ( UACH) .

References. Blanchard, 1852: 27 (desc.); Reed, 1888: 299 (cat.); Kertész, 1910: 128 (cat.); Porter & Edward, 1897: 13 (cat. & notes); Hine, 1914: 337 (cat.); Porter, 1921: 446 (cat., dist. & notes); Porter, 1924: 98 (cat.); Shannon, 1927: 27 (desc. & key); Shannon & Aubertin, 1933: 126 (desc.); Porter, 1934: 170 (cat.); Porter, 1938: 155 (cat.); Fluke, 1942: 3 (key); Stuardo, 1946: 122 (cat.); Fluke, 1950a: 143 (desc.); Etcheverry, 1951: 356 (cat.); Etcheverry, 1952: 308 (cat.); Fluke, 1956: 198 (cat.); Etcheverry, 1963: 6, 87 (cat.); Rojas, 1966: 175 (cat. of predators of aphids); Boyes et al., 1973: 371 (karyotypes); Thompson et al., 1976: 8 (cat.); Thompson et al., 2000: 40 (desc. & key), Lander et al., 2009: 408 (pollinator study); Sanzana et al., 2012: 28 (pollinator study).

World distribution. Argentina, Brasil and Chile.

Chilean distribution. From Arica y Parinacota to Los Ríos region ( Fig. 205 ).

Altitudinal range. From coastal to highland ecosystems (5– 2,930 m.a.s.l.).

Biology and notes. Syrphus reedi is associated with the EN native tree G. keule ( Lander et al., 2009) . This tree is found in a small area of the Chilean coastal mountain range between the Maule and Biobío regions ( Acevedo & Álvarez 1999), but S. reedi has a greater distribution in Chile. Biological interactions are not currently considered as a criterion in the IUCN Red List assessment ( IUCN 2012). Therefore, it is not possible to assign a threaten category to this fly based on the mutualism it exhibits with this threatened tree species. Syrphus reedi has also been associated to flowers of the exotic plant Eucalyptus nitens H. Deane & Maiden ( Sanzana et al., 2012) . Also, this species has been observed visiting flowers of other exotic and native plant species registered by citizen scientists such as Gilliesia graminea Lindl. (Camilo Colilaf, CSP record); L. maritima (Gabriela Germain, CSP record); Luma apiculata (Orlando Montes, CSP record); M. domestica (Vanessa Durán, Paz Gatica, Joaquín Sepúlveda, Romina Oberti and Rodrigo Barahona-Segovia, pers. obs.); Prunus sp. and R. raphanistrum (Asiel Olivares, CSP records).

Conservation status. LC; EOO = 344,810 km 2, AOO = 128 km 2, 28 subpopulations and 29 localities.

Figures

FIGURE 205. Distribution map of species of Chile: Syrphus octomaculatus Walker, 1836 (red circles); Syrphus reedi Shannon, 1927 (black circles), and Syrphus shorae Fluke, 1950 (green circles).

FIGURES 201–204. Syrphus octomaculatus Walker, 1836: (201) female in exotic plant, Providencia (Photo by Gabriela Germain) and (202) male visiting Loasa tricolor Ker. Gawl, La Ligua (Photo by César Martinez). Syrphus reedi Shannon, 1927: (203) female visiting Luma apiculata (DC) Burret (photo by Orlando Montes). Syrphus shorae Fluke, 1950: (204) visiting exotic plant, Providencia, Santiago (Photo by Gabriela Germain). Red arrows show the differences in the color of femora between S. reedi and S. shorae.