Spialia sertorius (Hoffmannsegg, 1804)
red underwing skipper
mine
Young larvae make a tiny blotch; soon they live free among spun leaves.
hostplants
Rosaceae, monophagous (?)
Sanguisorba minor.
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).
larva
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.
synonyms
Hesperia sao (Hübner, 1803).
references
Bink (1992a), Hering (1957a, 1964a), Kuchlein & Donner (1993a), Kuchlein & de Vos (1999a), Maček (1999a), Skala (1948a), Szőcs (1977a), Tax (1989a), de Wilde (1991a).