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.