Eupeodes (Metasyrphus) americanus ( Wiedemann, 1830 )

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 : 131-132

Eupeodes (Metasyrphus) americanus ( Wiedemann, 1830)

Fig. 186

Syrphus americanus Wiedemann, 1830: 129

Syrphus medius Jones, 1917: 224

Metasyrphus medius Matsumura 1918: 17

Syrphus wiedemanni Johnson, 1919: 32

Syrphus canadensis Curran, 1926c: 172

Syrphus lebanoensis Fluke, 1930: 139

Posthosyrphus flavipes Enderlein, 1938: 205 *

Type locality and data. “ North America ” (LT, A, NMW) .

Material examined. Metropolitana : 1♂, Antumapu, Universidad de Chile, 20–30.VI.1989, Leg. G. Barría ( MEUC); 1♂, Quebrada de la Plata, Maipú, IV.1967, Leg. N. Hichins ( MEUC) .

References. No references for Chile or Neotropical countries.

World distribution. British Columbia, Quebec and south Mexico; introduced in Hawaii (not established) and Chile.

Chilean distribution. Only recorded for Metropolitan region ( Fig. 187 ).

Altitudinal range. The species inhabits inland valley ecosystems (450–550 m.a.s.l.).

Biology and notes. Eupeodes americanus is here reported from Chile for the first time. Thompson in 2012 labeled a specimen from the MEUC collection as E. americanus . The label confirms that the species was found feeding on the aphid Eriosoma lanigerum (Haussman) . It is necessary to obtain new records in Chile to confirm if this species was able to establish viable populations in the country. Other aspects of its biology and ecology remain unknown in Chile.

Conservation status. Not evaluated because this species is considered exotic.

Figures

FIGURE 186. Dorsal habitus of Eupeodes americanus (Wiedemann, 1830). Scale bar = 2 mm.

FIGURE 187. Distribution map of Eupeodes species in Chile: Eupeodes americanus (Wiedemann, 1830) (blue circles), and Eupeodes rojasi Marnef, 1999 (red circles).