Chromocheilosia incerta ( Shannon & Aubertin, 1933 )

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 : 15

Chromocheilosia incerta ( Shannon & Aubertin, 1933)

Fig. 2

Chilosia incerta Shannon & Aubertin, 1933: 142

Cheilosia incerta Stuardo, 1946: 125 *

Type locality and data. “ Casa Pangue , Chile ” (T, ♀, USNM) .

Material examined. La Araucanía: 1♀, Río Blanco, Malleco , 27–31.I.1959, Leg. L. Peña ( CNC) ; Los Ríos: 1♂, Santo Domingo , 12.II.1980, 22.x.1972, Leg. E. Krahmer ( UACH) ; 1♀, Valdivia , 21.XII.1980, Leg. E. Krahmer ( UACH) ; Los Lagos: 1♀, Pucatrihue , 4–21.II.1967, Leg. L.E. Peña ( MEUC) ; 1♀, Dalcahue , 17–22.I.1962, Leg. L. Peña ( CNC) ; Casa Pangue, Llanquihue -41.0668, -71.8885; Castro ( Shannon & Aubertin 1933) .

References. Shannon & Aubertin, 1933: 142 (desc. & key); Stuardo, 1946: 125 (cat.); Fluke, 1957: 45 (cat.); Thompson, 1972b: 121 ( Milesiinae rev.); Thompson et al., 1976: 46.90 (cat.); Thompson, 1999a: 333 (key).

World distribution. Chile.

Chilean distribution. From La Araucanía to Los Lagos region ( Fig. 10 ).

Altitudinal range. This species inhabits mainly native forests near the coast (5– 99 m.a.s.l.). Some specimens have also been recorded in the precordillera.

Biology and notes. Chromocheilosia incerta is associated with the Valdivian forest, which has been highly fragmented by plantation forestry since the 1970s, as well as cattle and urbanization ( Miranda et al. 2017). Other aspects about its biology and ecology remain unknown.

Conservation status. VU under B2ab (iii) using AOO = 28 km 2 and seven localities and seven subpopulations; EOO = 41,336 km 2.

Figures

FIGURES 10. Distribution map of Chromocheilosia and Myolepta species in Chile: C. bicolor (Shannon & Aubertin, 1933) (pink circles); Chromocheilosia incerta (Shannon & Aubertin, 1933) (red circles); C. pubescens (Shannon & Aubertin, 1933) (light blue circles); M. haemorrhoidalis (Philippi, 1865) (green circles); Myolepta luctuosa (Bigot, 1857) (yellow circles), and M. nausicaa (Hull, 1937) (Brown circles).

FIGURES 1–3. Chromocheilosia bicolor (Shannon &Aubertin, 1933): (1) female, scale bar not available (photo by Ximo Mengual, licence CC: BY-NC-SA). Chromocheilosia incerta (Shannon & Aubertin, 1933): (2) male, lateral view (photo by Patricia Henríquez). Scale bar = 1 mm. Chromocheilosia pubescens (Shannon & Aubertin, 1933); (3) female, lateral view (photo by Patricia Henríquez). Scale bar = 1 mm.