Valdiviomyia nigra ( Shannon, 1927 )

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 : 69

Valdiviomyia nigra ( Shannon, 1927)

Figs 97–98

Valdivia nigra Shannon, 1927: 32

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

Material examined. Metropolitana : 1♂, Santiago, 1924, Leg.Faz ( USNM) ; La Araucanía: 1♂, Cautín , Villarrica, 1.X.1987, L.E. Peña ( MNHNC) ; Los Lagos : 2♀, Caulín , Chacao, Chiloé, 4–3.II.2010, Leg. P. Martínez ( CSD) ; 1♂, Dalcahue , Chiloé, 10–20.II.1957, Leg. L.E. Peña ( CNC) ( Mengual, 2017) ; 1♀, Isla Mechuque , 16.XI.2018, Leg. R. Barahona-Segovia ( PCRBS) .

References. Shannon, 1927: 32 (desc.); Shannon & Aubertin, 1933: 146 (desc. & key); Stuardo, 1946: 126 (cat.); Fluke, 1957: 56 (cat.); Etcheverry, 1963: 93 (cat.); Thompson, 1972b: 160–161 ( Milesiinae rev.); Thompson et al., 1976: 118 (cat.); Thompson & Thompson, 2017: 17 (rev. & key); Mengual, 2017: 436, figs 12–13 (key).

World distribution. Chile.

Chilean distribution. From Metropolitan to Los Lagos region ( Fig. 103 ).

Altitudinal range. From coastal to inland valley ecosystems (5– 500 m.a.s.l.).

Biology and notes. Valdiviomyia nigra is associated with native forests, especially with the floral resources E. cordifolia (C. Smith-Ramírez, com. pers.) and A. meli (R. Barahona-Segovia, pers. obs.). The specimen collected in “ Santiago ” could potentially be a labeling mistake. New specimen needs to be collected to corroborate this locality.

Conservation status. EN under B2ab (iii) using AOO = 20 km 2 and five localities (or subpopulations); EOO = 1,312,585 km 2.

Figures

FIGURE 103. Distribution map of Valdiviomyia camrasi (Sedman, 1965) (blue circles); Valdiviomyia darwini (Shannon, 1927) (red circles); Valdiviomyia edwardsi (Shannon & Aubertin, 1933) (black circles); Valdiviomyia gigantea Thompson, 2017 (Brown circles); Valdiviomyia nigra (Shannon, 1927) (pink circles); Valdiviomyia ruficauda (Shannon, 1927) (yellow circles); Valdiviomyia shannoni Thompson 2017 (green circles); Valdiviomyia valdiviana (Philippi, 1865) (black triangle) in Chile.

FIGURES 97–102. Valdiviomyia nigra (Shannon, 1927): (97) lateral and (98) dorsal view. Scale bar = 4 mm. Valdiviomyia ruficauda (Shannon, 1927): (99) lateral and (100) dorsal view. Scale bar = 1 mm. Valdiviomyia shannoni Thompson 2017: (101) lateral and (102) dorsal view. Scale bar = 1 mm. Photos by Vicente Valdés.