Notiocheilosia nitescens ( 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 : 24-26

Notiocheilosia nitescens ( Shannon & Aubertin, 1933)

Figs 24–25

Chilosia nitescens Shannon & Aubertin, 1933: 143

Cheilosia nitescens Fluke, 1957: 45 *

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

Material examined. Coquimbo: 2♂, 4♀, El Naranjo, Tilama , X.1967, Leg. J. Molina, ( MEUC) ; Valparaíso: 1♂, Hacienda Las Palmas, Ocoa , 7.IX.1960, Leg. L. Campos ( MEUC) ; Metropolitana : 1♂, Caleu, Lo Marin , 25.IX.1983, Leg. M. Cerda ( MNHNCL) ; 4♀, Quilicura , 6.II.1955, Leg. L. Peña ( CNC) ; 1♂, Ñuñoa , 21.X.1986, Leg. G. Cerda

( MNHNCL); Maule: 2♂, 1♀, El Radal, 23–30.XI.1957, Leg. L. Peña ( CNC); 1♂, El Coigo, 1–20.II.1960, Leg. L. Peña ( CNC); 1♂, Fundo Malcho, I.1957, Leg. L.E. Peña ( CNC); Ñuble: 1♂, Puente Marchant, 20.XII.1987, Leg. Roitman ( MNHNCL); 1♂, 1♀, Las Trancas, XII.1954, Leg. NN ( IEUMCE); La Araucanía: 6♂, Termas de Tolhuaca, 20.I.1957, Leg. L. Peña ( CNC); 2♀, Termas de Rio Blanco, 19.II.1973, Leg. Etcheverry ( IEUMCE); Los Ríos: 1♂, Valdivia, 8.XII.1973, Leg. E. Krahmer ( UACH); Los Lagos: Ensenada ( Shannon & Aubertin 1933); Puerto Varas ( Shannon & Aubertin 1933); Puerto Montt ( Shannon & Aubertin 1933); Senda Darwin Biological Station ( Smith-Ramírez et al. 2005).

References. Shannon & Aubertin, 1933: 143 (desc.); Ruiz & Stuardo, 1935: 318 (natural history); Stuardo, 1946: 125 (cat.); Fluke, 1957: 45 (cat.); Etcheverry, 1963: 25 (cat.); Thompson, 1972b: 112, fig. 37 (male genitalia) ( Milesiinae rev.); Thompson et al., 1976: 46.88 (cat.); Thompson, 1999a: 333 (key); González & Coscarón, 2005: 347 (distr.); Smith-Ramírez et al., 2014: 6 (ecological study, supplementary material); Miranda & Moran, 2016: 7, figs 10, 11, 18, 33 & 34 (female terminalia).

World distribution. Argentina and Chile.

Chilean distribution. From Coquimbo to Los Lagos region ( Fig. 28 ).

Altitudinal range. From coastal to precordillera ecosystems (5– 1,150 m.a.s.l.).

Biology and notes. Thompson (1972b) comments that Notiocheilosia has a problematic systematic position because it has a morphological combination of characters that can be attributed to different tribes. Notiocheilosia nitescens is a native species, recorded visiting flowers of Amomyrtus meli (Phil.) D. Legrand & Kausel , and Myrceugenia ovata var. ovata (Hook. & Arn.) O. Berg ( Smith-Ramírez et al., 2005) as well as E. cordifolia in Chiloé.

Conservation status. LC; EOO = 99,081 km 2; AOO = 44 km 2 and 11 localities (or subpopulations).

Figures

FIGURE 28. Distribution map of Austroascia segersii Thompson & Marnef, 1977 (red circles); Chamaesphegina argentifascies Shannon & Aubertin, 1933 (blue circles); Notiocheilosia nitescens Shannon & Aubertin, 1933 (black circles); Orthonevra chilensis Thompson, 1999 (green circles) and Sphiximorpha barbiger (yellow circles) in Chile.

FIGURES 20–25. Chamaesphegina argentifascies Shannon & Aubertin, 1933: (20) male, dorsal view; (21) male, lateral view. Scale bars = 1.2 mm (photos by Vicente Valdés). Chamaesphegina macra: (22) male, dorsal view and (23) lateral, view (photo by Zöe Simmons; ZMHB). Scale bars = 1 mm. Notiocheilosia nitescens Shannon & Aubertin, 1933: (24) lateral view and (25) dorsal view. Scale bars = 1 mm (photos by Vicente Valdés).