Eosalpingogaster nigriventris ( Bigot, 1883 )

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 : 129-130

Eosalpingogaster nigriventris ( Bigot, 1883)

Figs 183–184

Salpingogaster nigrivent ris Bigot, 1883: 329

Baccha mimetica Brèthres, 1907: 292 *

Salpinogaster macula (misidentification): Sack, 1920: 224 *

Salpingogaster liposeta Fluke, 1937: 10

Salpingogaster dactylopiana Thompson et al., 1976: 33

Type locality and data. “ Uruguay, Montevideo ” (T, ♀, BMNH) .

Material examined. Arica y Parinacota: 2♂ , Valle de Lluta, 2.VII.1986, V.1997, Leg. D. Bobadilla (UTA).

References. Bigot, 1883: 329 (des); Williston, 1886: 315 (cat.); Brèthes, 1907: 292 (cat.); Lahille, 1907: 119, figs 27–28, plate VIII, figs 1–3 (descr., Argentina); Kertész, 1910: 169 (cat.); Sack, 1920: 249, figs J–L (desc.); Sack, 1921: 135, figs 7–8 (desc.); Curran, 1932: 5 (key); Shannon & Aubertin, 1933: 135 (desc.); Curran, 1934: 396 (key); Fluke, 1937: 5, figs 12–13 (desc.); Curran, 1941: 283 (key); Sauer, 1946 (prey, Brazil); Hull, 1949b: 299, fig. 11H (placed in subg. Eosalpingogaster Hull, 1949b: 299 ); Fluke, 1957: 5 (cat.); Soukup, 1959: 204 (dist.); Knutson, 1971: 34, figs 3 & 5 (desc., prey & parasitoids); Thompson et al., 1976: 33 (cat.); Mengual & Thompson, 2011: 724 (desc. & key).

World distribution. Argentina, Brazil, Ecuador, Peru, Trinidad Island, Uruguay, Venezuela and Chile.

Chilean distribution. Lluta Valley in the Arica and Parinacota region ( Fig. 185 ).

Altitudinal range. From coastal to inland valley ecosystems (0– 200 m.a.s.l.).

Biology and notes. Eosalpingogaster nigriventris is here reported from Chile for the first time. This species is morphologically similar to E. conopida . The species Ethelurgus rufipes (Brèthes) (Ichneumonidae) , Prosaspicera cesarina (Brèthes) (Figitidae) and Trichomalus polviventris Brèthes have been mentioned as parasitoids of this species by Silva et al. (1968). It has been described that E. nigriventris prey on Coccidae and Diaspididae (Lizer y Trelles 1939; Knutson 1971).

Conservation status. DD; AOO = 2 km 2 and one locality (or subpopulation).

Genus Eupeodes Osten Sacken, 1877

Eupeodes Osten Sacken, 1877: 328 . Type-species, E. volucris Osten Sacken (mon). Refs. Thompson et al., 1976: 9 (cat.); Thompson, 1999a: 328 (key).

Posthonia Enderlein, 1938: 203 . Type-species, P. longipenis Enderlein (orig. des.).

Subgenus Eupeodes Osten Sacken, 1877

Figures

FIGURE 185. Distribution map of Eosalpingogaster in Chile: Eosalpingogaster conopida (Philippi, 1865) (blue circles) and Eosalpingogaster nigriventris (Bigot, 1892) (red circles).

FIGURES 181–184. Eosalpingogaster conopida (Philippi, 1865): (181) lateral view (photo by Vicente Valdés) and (182) flying in Lo Vásquez, Valparaíso (Photo by José Luis Inostroza). Eosalpingogaster nigriventris (Bigot, 1892): (183) lateral view (Photo by Vicente Valdés) and (184) dorsal view, Humedal de Lluta, Arica (Photo by Rodrigo Castillo). Scale bars = 1 mm.