Allograpta robinsoniana 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 : 117

Allograpta robinsoniana Enderlein, 1938

Fig. 169

Allograpta robinsoniana Endelein, 1938: 664

Type locality and data. “ Juan Fernández , Chile ” (ST, ♂, ♀, NHRS) .

Material examined. Valparaíso: 1♂, Juan Bautista, Masatierra 31.XII.1951, Leg. Kuschel ( IEUMCE) ; 1♂, Robinson Crusoe , 31.XII.1951, Leg. Kuschel ( IEUMCE) ; 1♀, Mirador Selkirk , 31.XII.1951, Leg. Kuschel ( IEUMCE); 1m ♀, Conaf, Masatierra , no date, Leg. NN ( MNHNCL) ; 1♂, Robinson Crusoe , 31.XII.1951, Leg. Kuschel ( MZUC) ; 1♀, Robinson Crusoe , 9.I.1952, Leg. Kuschel ( MZUC) .

References. Enderlein, 1938: 664 (desc.); Stuardo 1946: 123 (cat.); Fluke, 1955: 40 (desc.); Fluke, 1956: 210 (desc.); Etcheverry, 1963: 14 (cat.); Thompson et al., 1976: 37 (cat.); Mengual et al., 2009: 15 (distr.); López et al., 2012: 12 (key).

World distribution. Chile.

Chilean distribution. Restricted to Juan Fernández Islands ( Fig. 170 ).

Altitudinal range. The species inhabits native forests in ravines and cliffttops (200– 600 m.a.s.l.).

Biology and notes. Allograpta robinsoniana is only found in the Juan Fernández Islands. This species has been classified as EN due to habitat loss and its predation by the invasive species as Turdus falcklandii magellanicus King and Capra hircus (Linnaeus) also contributes to this problem by eating endemic plants the larvae use for their development. Nothing is known about the biology of this species.

Conservation status. EN under B1ab (iiii) + 2ab (iii) using EOO = 542 km 2, AOO = 24 km 2 and two localities (or subpopulations).

Genus Austroscaeva Láska, Mazánek & Mengual, 2018

Austroscaeva Láska, Mazánek & Mengual in Mengual et al. 2018a: 161. Syrphus melanostoma Macquart, 1842: 147 . Refs. Shannon & Aubertin, 1933 (key); Thompson, 1999a: 325, 327 (key); Mengual et al., 2018a.

Scaeva Fabricius, 1805: 248 . Type-species, Musca pyrastri Linnaeus, 1758 (Subs. des.; Curtis, 1834: 509).

Catabomba Osten Sacken, 1877: 329 Type-species, Musca pyrastri Linnaeus, 1758 (mono.).

Lasiopthicus Rondani, 1845: 459 . Type-species, Musca pyrastri Linnaeus, 1758 (orig. des.).

Figures

FIGURE 170. Distribution map of Allograpta species in Chile: Allograpta exoticus (Wiedemann, 1830) (blue circles); Allograpta hortensis (Philippi, 1865) (red circles); Allograpta pulchra Shannon, 1927 (black circles); Allograpta piurana Shannon, 1927 (green circles) and Allograpta robinsoniana Enderlein, 1938 (yellow circles).

FIGURES 168–169. Dorsal habitus of (168) Allograpta piurana Shannon, 1927, and (169) Allograpta robinsoniana Enderlein, 1938. Scale bars = 1 mm.