Spialia sertorius (Hoffmannsegg, 1804)

red underwing skipper

mine

Young larvae make a tiny blotch; soon they live among spun leaves.

hostplants

Rosaceae, monophagous (?)

Also Potentilla and Rubus are mentioned; perhaps the species is less selective in some parts of its distributional area.

phenology

Young larvae in July (de Wilde, 1991a).

BENELUX

BE recorded (Phegea, 2010).

NE recorded waargenomen (Kuchlein & de Vos, 1999a)l extinct.

LUX recorded (Fauna Europaea, 2010).

distribution within Europe

From Germany and Poland to the Iberian Peninsula and Italy, and from France to Hungary (Fauna Europaea, 2010).

egg, larva, pupa

The mining larva is yolk-yellow; in the free living stage, full fed, the caterpillar is dull blackish brown with three interrupted yellow length lines and has numerous long erect hairs. Pictures on Lepiforum

synonyms

Hesperia sao (Hübner, 1803).

references

Bink (1992a), Dupont, Luquet, Demerges & Drouet (2013a), Hering (1957a, 1964a), Kuchlein & Donner (1993a), Kuchlein & de Vos (1999a), Lepiforum (2021), Maček (1999a), Skala (1948a), Szőcs (1977a), Tax (1989a), Vegliante & Zilli (2007a), de Wilde (1991a).