Scolioneura vicina Konow, 1894
on Betula
Betula pendula, Hungary, Kimle, 27.v.2018 © László Érsek
the frass of mining sawflies is dry and does not stick to the walls of the mine; it accumulates at the lowest point like grains of pepper in an envelope.
larva, dorsal and ventral
head and pronotum dorsal
head and sternum
legs
terminal part of abdomen, ventral
do, lateral
Betula pubescens, Aalten, 24.v.2002
Betula pubescens, Diemen, 28.v.2015 © Berend de Vries: mass occurrence
Betula pendula, Castricum: very young mine, 9.v.2011
mine
Large, transparant, in fresh condition pale green blotch that begins at the leaf margin, without an accumulation of frass. The complete mine may occupy almost the entire leaf. Mine and larva are indistinguishable from those of S. betuleti, but vicina larvae live from mid May till mid June, while the larvae of betuleti are found only in August – October (Altenhofer & Taeger, 1998a).
host plants
Betulaceae, monophagous
Betula papyrifera, pendula, pubescens.
phenology
Univoltine. Larvae from mid May till mid June.
BENELUX
BE recorded (Fauna Europaea, 2008).
NE Recorded (Ellis, not rare).
LUX recorded (Chevin, Ellis & Schneider, 2011a).
distribution within Europe
From Sweden and Finland to Austria, and from Britain to Germany (Edmunds, 2008a; Fauna Europaea, 2008).
larva
synonyms
A study by Leppänen, Altenhofer, Liston & Nyman (2012a) has shown that at the DNA-level there is no difference with Scolioneura betuleti. Probably both species will have to be synonymised, in which case the oldest name, viz. betuleti, will be the valid one.
references
Altenhofer (2003a), Altenhofer & Taeger (1998a), Beneš & Holuša (2015a), Blank ao (1998a), Chevin, Ellis & Schneider (2011a) , Digweed ao (2009a), Edmunds (2008a), Pschorn-Walcher & Altenhofer (2006a), Haase (1942a), Kozlov, van Nieukerken, Zverev & Zvereva (2013a), Liston & O’Connor (2005a), Savina & Chevin (2012a), Taeger, Blank & Liston (2006a), Leppänen, Altenhofer, Liston & Nyman (2012a), Pschorn-Walcher & Altenhofer (2000a), Roller & Macek (2017a), Savina & Chevin (2012a), Taeger ao (1998a), Zombori (1978a).