Pseudoscaeva schoenemanni ( Enderlein, 1938 )

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 : 141-143

Pseudoscaeva schoenemanni ( Enderlein, 1938)

Figs 198–199

Allograpta schoenemanni Enderlein, 1938: 225

Ocyptamus shoenemanni Mengual et al., 2009: 3 *

Type locality and data. “ Cauquenes , Chile ” (T, ♀, ZMHU) .

Material examined. Coquimbo: 3♂, El Naranjo, Tilama, no date, Leg. L.E. Peña ( MEUC) ; Maule: Cauquenes ( Enderlein 1938).

References. Enderlein, 1938: 225 (cat.); Stuardo, 1946: 123 (cat.); Fluke, 1956: 210 (desc.); Etcheverry, 1963: 15, 137 (cat.); Thompson et al., 1976: 37 (cat.); González & Coscarón, 2005: 347 (distr.); Mengual et al., 2009: 3 (comments in introduction); Mengual et al., 2018b: 14 (desc. group).

World distribution. Chile.

Chilean distribution. This species has been recorded only for Coquimbo and Maule region ( Fig. 197 ).

Altitudinal range. From coastal to inland valley ecosystems (2– 491 m.a.s.l.).

Biology and notes. The habitat of P. schoenemanni has been intensively replaced with crops or urbanization, mainly in central Chile where many native ecosystems already are threatened ( Alaniz et al., 2016). On the other hand, Maulino forest has been replaced by forestry ( Miranda et al., 2017) decreasing the habitat quality. Therefore, we applied precautory principle to assign a Red List classification to this species. All basic aspects of its biology and ecology remain unknown.

Conservation status. EN under B2ab (iii) using AOO = 8 km 2 and two localities (or subpopulations).

Genus Syrphus Fabricius

Syrphus Fabricius, 1775: 762 . Type-species, Musca ribesii Linnaeus (see Wirth et al., 1965: 558)

Refs. Fluke, 1942: 2–3 (key, rev. Neotropical spp.); Vockeroth, 1969: 55–57 (descript); Thompson, 1981: 23 (desc. note); Thompson, 1999a: 326 (key); Thompson et al., 2000: 7 (key and descriptions); Marinoni et al., 2007: 148, 150 (desc., key, illustrations).

Figures

FIGURE 197. Distribution map of Fragosa, Nuntianus and Pseudoscaeva species in Chile: F. filiola (Shannon, 1927) (yellow circles); N. philippianus (Enderlein, 1938) (purple circles) and P. schoenemanni (Enderlein, 1938) (blue triangles).

FIGURES 198–199. Pseudoscaeva schoenemanni (Enderlein, 1938): (198) lateral view, and (199) dorsal and wings view (Photos by Vicente Valdés). Scale bar = 1 mm