Syritta flaviventris Macquart, 1842

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 : 72-73

Syritta flaviventris Macquart, 1842

Fig. 104

Syritta flaviventris Macquart, 1842: 135

Austrosyritta cortesi Marnef, 1967: 269

Type locality and data. “ Senegal ” (HT, ♂, MNHNP) .

Material examined. Arica y Parinacota: 1♂, Lluta , Molino, 2.IX.1989, Leg. R. Mendoza ( UTA) ; 1♀, Codpa , 30.I.1985, Leg. M. Cerda ( MNHNCL) ; Atacama : 2♂, Freirina , 14.X.1969, Leg. L.E. Peña ( MEUC) ; Coquimbo : 1♂, El Molle, Elqui , 12.II.2017, phot. col. Gabriela Germain ( CSP) ; 1♂, Elqui , 02.II.1990, Leg. G. Cerda ( MNHNCL) ; Valparaíso : 1♂, Fundo Las Palmas , Quintero, 09.IX.1977, Leg. NN ( MNHNCL) ; 1♀, Quillota , 07.II.1970, Leg. NN ( MNHNCL) ; 1♀, Viña del Mar , 03.I.1979, Leg. A. Pérez ( MNHNCL) ; 2♂, 1♀, Isla de Pascua, 16.VI.2009, Leg. C. Pakarati ( SAG) ; 1♂, Rano Kao , 21.V.1971, Leg. L.E. Campos & L.E. Peña ( MEUC) ; Metropolitana : 2♂, 2♀, Cuesta La Dormida , I. X.1969, Leg. L.E. Peña ( MEUC) ; 1♀, Caleu , TilTil, 24.I.1987, Leg. J. Cerda ( MNHNCL) ; 1♂, Colina 24.III.1966, Leg. J. Solervicens ( MNHNCL) ; 1♂, Curacaví , 16.III.1984, Leg. Rodríguez ( MNHNCL) ; 1♂, 1♀, Santiago , 7.II.1990, Leg. R. Trincado ( INIA) ; 1♂, Ñuñoa , 01.XI.1992, Leg. P. Cerda ( MNHNCL) ; Los Ríos: 3♂, 2♀, Valdivia , 15.II.1972, Leg. E. Krahmer ( UACH) ; Los Lagos : El Peñon, Olmopulli, 24.XI.2019, Phot. col. Fernando González ( CSP) .

References. Macquart, 1842: 135 (desc.); Campos & Peña, 1973: 225 (cat.); Thompson, 1971: 524 (Nepentho-

syrphus rev. as A. cortesi ); Thompson, 1972b: 169, fig. 69 (male genitalia), 69a (aedeagus and apodeme), 69e (ejaculatory apodeme), 69s (sternum), 69t (tergum) ( Milesiinae rev.); Thompson et al., 1990: 70 (key & new records).

World distribution. Originally from Africa ( Madagascar) and Southern Europe. Introduced to Brazil, USA (Texas), Mexico and Chile.

Chilean distribution. From Arica y Parinacota to Los Lagos region ( Fig. 110 ).

Altitudinal range. From coastal to precordillera ecosystems (5– 1,500 m.a.s.l.).

Biology and notes. Syritta flaviventris is an exotic species probably introduced in the 1960s. This synanthropic species visits several exotic flowers such as B. rapa (Matías Cortés, CSP record), T. officinalis (Rodrigo Barahona- Segovia pers. obs.), E. pectinatus (Luis Jopia, CSP record), Leontodon saxatalis Lam. (Rodrigo Barahona-Segovia pers. obs.), and Chrysanthemum sp. (R. Barahona-Segovia pers. obs.). It can be found mainly in cities or crops near urban areas. There are also records of visits in native species such as Haplopappus sp. (R. Barahona-Segovia, pers. obs.), Heliotropium stenophyllum Hook. et Arn (César Martínez, CSP record), Cryptantha sp. (Orlando Montes, CSP record) and Baccharis salicifolia (Ruiz y Pav.) Pers. (Sebastián Andrade, CSP record).

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

Genus Tropidia Meigen, 1822

Tropidia Meigen, 1822: 346 . Type-species, Eristalis milesiformis Fallen, 1857 (sub. des.) = Musca scita Harris, 1782 .

Subgenus Tropidia Meigen, 1822

Figures

FIGURE 110. Distribution map of Tropidia flavimana (Philippi, 1865) (black circles); Tropidia rubricornis Philippi, 1865 (violet circles); Tropidia notata (Bigot, 1882) (red circles); Tropidia nigricornis Philippi, 1865 (green circles) and Syritta flaviventris Mcquart, 1842 (blue circles) in Chile.

FIGURES 104–109. Syritta flaviventris Mcquart, 1842: (104) visiting a ‘margarita’, Maipú (photo by Pablo Moreno). Tropidia notata (Bigot, 1882): (105) dorsal view (photo by Vicente Valdés). Tropidia nigricornis Philippi, 1865: (106) in situ lateral view and (107) dorsal view (Photos by Vicente Valdés). Tropidia flavimana (Philippi, 1865): (108) lateral and (109) dorsal view (photos by Vicente Valdés). Scale bars = 0.2 mm.