Sterphus coeruleus ( Rondani, 1863 )

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 : 79-81

Sterphus coeruleus ( Rondani, 1863)

Figs 115–116

Xylota coerulea Rondani, 1863: 8

Sterphus antennalis Philippi, 1865: 737 *

Sterphus autumnalis Philippi, 1865: 782

Sterphus coerulius Williston, 1888: 285 *

Type locality and data. “ Chile ” (T, ♂, MZUN) .

Material examined. Maule: 1♂, 1♀, Los Cipreces , 14.I.1968, Leg. L.E. Peña ( MEUC) ; 1♀, Estero La Jaula , I.1964, Leg. L. Peña ( CNC) ; 1♂, Fundo Malcho , I.1957, Leg. L. Peña ( CNC) ; 2♂, 1♀, Las Cruces , X.1958, Leg. L. Peña ( CNC) ; 1♂, Río Colorado, 8.I.1960, Leg. L. Peña ( CNC) ; 1♂, 1♀, Reserva Nacional Los Queules , 24.XI.2017, Leg. R. Barahona-Segovia ( PCRBS) ; Ñuble : 1♂, Chillán, 1949, Leg. NN ( MNHNCL) ; 1♂, Yungay , 08.I.1994, Leg. J. Cerda ( MNHNCL) ; 1♂, Florida, Quillón , 15.XII.1962, Leg. Feltis ( MZUC) ; Biobío: 1♂, 1♀ , Concepción, 03.III.1962, Leg . Artigas & Mendez ( MZUC) ; 1♀, Chiguayante , 19.V.1961, Leg. NN ( MZUC) ; 1♂, Pichinahuel , 20.II.1953, Leg. L. Peña ( CNC) ; 1♂, Pemehue , 20.I.1946, Leg. L.E. Peña ( INIA) ; La Araucanía: 1♂, Parque Nacional Nahuelbuta , 3.XII.1944, Leg. Bullock ( MNHNCL) ; 1♂, Angol , 10.III.1949, Leg. NN ( MNHNCL) ; 1♂, Collipulli , 25.II.1963, Leg. Mendez ( MZUC) ; 1♂, Contulmo , 31.I.1970, Leg. Cekalovic ( MZUC) ; 1♂, Cabrería , I.1977, Leg. L. Peña ( CNC) ; 1♂, 2♀, Río Blanco , II.1964, Leg. L. Peña ( CNC) ; 1♀, Volcán Villarrica , 29.XII.1982, Leg. A. Newton & M. Thayer ( CNC) ; Los Ríos: 1♂, Rininahue , 1–2.III.1968, Leg. NN ( MEUC) ; 1♀, Valdivia, 1985, Leg. NN ( MNHNCL) ; 1♂, Llancahue , 19.I.1966, Leg. Hichins ( MNHNCL) ; 1♀, Pucatrihue , 18.II.1960, Leg. NN ( MZUC) ; 1♀, Llancacura , I.1955, Leg. Silbermann ( INIA) ; Los Lagos: 1♀, Río GolGol , 11.XI.1957, Leg. L. Peña ( CNC) ; 1♂, Frutillar , 10.II.1966, Leg. J. Silva ( MNHNCL) ; 2♂, Parque Nacional Puyehue , 1.III.2017, Leg. V.C. Silva & D.S. Amorim ( CNC) ; 1♀, Contao , 22.II.1966, Leg. J. Silva ( MNHNCL) ; 1♂, Lago Chapo , 28.II.1983, Leg. G. Arriagada ( MNHNCL) ; 1♂, Puerto Montt , XII.1958, Leg. Alvarado ( MZUC) ; 1♂, El Quilar, km14, Chiloé , 27.I.1967, Leg. C. Vivar ( MNHNCL) ; 10♂, 1♀, Dalcahue , XI.1981, Leg. NN ( MZUC) ; 1♂, 3♀, Ahoní , 24.XII.1993, Leg. G. & M. Wood ( CNC) ; 1♂, Castro , 18.II.1968, Leg. Cekalovic ( MZUC) ; 2♂, Cucao- Huillinco , 26.XII.1993, Leg. G. Wood ( CNC) ; 1♂, Quellón , 23.I.1963, Leg. C. Vivar ( MNHNCL) ; 1♂, Palena , I.1987, Leg. NN ( MNHNCL) ; Aysén: 5♂, 18♀, Puerto Aysén, 28.II.1962, Leg. L. Peña ( CNC) ; 1♀, Katalikar, Tortel , 20.III.2013, Leg. O. Ojeda ( SAG) ; Magallanes: 1♀, La Caleta, 18.III.1969, Leg. J. Cerda ( MNHNCL) .

References. Rondani, 1863: 8 (desc.); Philippi, 1865: 737 (desc.); Williston, 1886: 321 (cat.); Reed, 1888: 300 (cat.); Lynch Arribálzaga, 1892: 190 (cat.); Kertész, 1910: 308 (cat.); Shannon, 1926: 46 (desc.); Porter, 1932: 190 (cat. & notes); Shannon & Aubertin, 1933: 156, fig. 33 (head, male) (desc.); Porter, 1937: 42 (distr.); Stuardo, 1946: 127 (cat.); Hull, 1949b: 369 (desc.); Fluke, 1957: 107 (cat.); Pino, 1962: 47 (morph.); Etcheverry, 1963: 80 (cat.); Thompson, 1971: 526, fig. 1 (head, lateral) ( Nepenthosyrphus rev.); Thompson, 1972b: 155 ( Milesiinae rev.); Thompson, 1973: 199 (key & desc.); Thompson et al., 1976: 116 (cat.); Hippa & Thompson, 1994: 494 (key); Zumbado & Thompson, 1997: 87 (key); González & Coscarón, 2005: 347 (distr.).

World distribution. Argentina and Chile.

Chilean distribution. From Maule to Magallanes region ( Fig. 117 ).

Altitudinal range. From coastal to precordillera ecosystems (5– 1,200 m.a.s.l.).

Biology and notes. Sterphus coeruleus is mainly associated with native forests. It has been observed feeding on E. cordifolia (Cecilia Smith-Ramírez, com. pers.) and L. sempervirens (R. Barahona-Segovia, pers. obs.). Porter (1932) mentioned this species is present in Aconcagua, which could be an error because it is based on old literature.

Conservation status. LC; AOO = 377,436 km 2, EOO = 192 km 2, 40 subpopulations and 44 localities.

Figures

FIGURE 117. Distribution map of Sterphus aurifrons Shannon, 1926 (blue circles); Sterphus coeruleus (Rondani, 1863) (red circles), and Sterphus plagiatus (Wiedemann, 1830) (yellow circles) in Chile.

FIGURES 113–116. Sterphus aurifrons Shannon, 1926: (113) resting in a dead wood, Juan Fernández Island (photo by Cristian Pardo) and (114) resting in Rhaphithamnus venustus (Phil.) B.L. Rob., Juan Fernández Island (photo by Hernán González). Sterphus coeruleus (Rondani, 1863): (115) resting in a leave, Los Lagos (photo by Luis Candia) and (116) dorsal view (photo by Matías Barceló). Scale bars = 1 mm.