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.