Valdiviomyia darwini ( 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 : 67

Valdiviomyia darwini ( Shannon, 1927)

Figs 91–92

Valdivia darwini Shannon, 1927: 32

Type locality and data. “ Valdivia , Chile ” (T, ♂, BMNH) .

Material examined. Biobío: 1♂, 1♀, Pemehue , 13.III.1955, Leg. L. E. Peña ( CNC) ; La Araucanía: 1♂, Sierra de Nahuelbuta, west of Angol , 2.II.1951, Leg. Ross & Michelbacker ( CAS) ; 32♂, 25♀, Termas de Río Blanco , 19.II.1973, Leg. NN ( IEUMCE) ; 1♀, Cordillera Las Raíces , 7–8.II.1979, Leg. D. & M. Davis & B. Ackelbergs ( USNM) ; 1♂, 1♀, Lonquimay , V.1994. Leg. L.E. Peña & A. Ugarte ( MEUC) ; 1♂, Termas de Palguin , 22.IX.1966, Leg. NN ( IEUMCE) ; Los Ríos: 3♀, Valdivia , 4.X.1972, 4.V.1969, 23.IV.1978, Leg. E. Krahmer ( UACH) ; Los La- gos : 1♂, Remehue , 20.I.1976, Leg. NN ( IEUMCE) ; 1♂, Lago Chapo , 28.II.1983, Leg. Arriagada ( MNHNCL) ; 2♀, Dalcahue , 17-22.I.1962, Leg. L. Peña ( CNC) .

References. Shannon, 1927: 32 (key & desc.); Shannon & Aubertin, 1933: 149 (desc. & key); Stuardo, 1946: 126 (cat.); Hull, 1949b: 339 (desc.); Fluke, 1957: 55 (cat.); Etcheverry, 1963: 91 (cat.); Sedman, 1965: 198, fig. 1 (head, lateral, female), fig. 2 (head, lateral, male), fig. 3 (male genitalia), fig. 4 (axial system of male genitalia) (figures); Thompson, 1972b: 160–161, fig. 63 (male genitalia), 63a (aedeagus and apodeme), 63e (ejaculatory apodeme), 63s (sternum), 63t (tergum) ( Milesiinae rev.); Thompson et al., 1976: 118 (cat.); González & Coscarón, 2005: 347 (distr.); Miličić et al., 2011: 523 (cat. of species dedicated to Darwin); Thompson & Thompson, 2017: 16 (rev. & key); Mengual, 2017: 436, figs 4–5 (key).

World distribution. Chile.

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

Altitudinal range. From coastal to precordillera ecosystems (5– 1,390 m.a.s.l.).

Biology and notes. Valdiviomyia darwini is associated mainly with the Valdivian evergreen forest, which has been extensely fragmented by urbanization, croplands and forestry ( Miranda et al., 2017). All basic aspects of its biology and ecology remain unknown.

Conservation status. VU under B2ab (iii) using AOO = 36 km 2 and nine localities (or subpopulations); EOO = 69,550 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 91–96. Valdiviomyia darwini (Shannon, 1927): (91) lateral and (92) dorsal view. Scale bars = 2 mm. Valdiviomyia gigantea Thompson, 2017 (93) male, lateral view. Scale bar = 4 mm; (94) female, lateral view. Scale bar = 4 mm; (95) male, terminalia not detached. Scale bar = 4 mm, and (96) wing, dorsal view. Scale bar = 2 mm (photos by Vicente Valdés).