Physemocecis ulmi (Kieffer, 1909)
on Ulmus
Ulmus glabra, Norway, Gressholmen, 1.vii.2020 © Hallvard Elven: gall
Ulmus glabra, Norway, Gressholmen, 1.vii.2020 © Hallvard Elven: gall
Ulmus glabra, Norway, Gressholmen, 1.vii.2020 © Hallvard Elven: gall
Ulmus glabra, Norway, Fornebu, Rolfstangen, 18.vi.2022 © Hallvard Elven: larva
Ulmus spec., Hungary, Mosonmagyaróvár 24.v.2019 © László Érsek
same gall, underside: fresh galls are almost imperceptible
somewhat older gal
underside
section through the gall
opened gall with the larva in a drop digestive fluid
larva, ventral view
underside of an old, vacated gall
Ulmus minor, Belgium, Liège, Citadelle, 2.vi.2012 © Jean-Yves-Baugnée
underside of the leaf
Ulmus sp., Belgium, prov. Namur, Couvin gare, 3.viii.2015 © Stéphane Claerebout: two fresh and four old galls
larva in the gall
Ulmus glabra, Nieuwendam, 20.vii.1999, upper side
the lower surface has an opening, closed by a cone of elongated epidermis cells
lower side of a vacated gall
gall
Larva solitary, white, in a single generation per year. Pupation in the ground.
host plants
Ulmaceae, monophagous
Ulmus glabra, laevis, minor & subsp. canescens.
larva
prosternum with spatula (from Möhn, 1955a)
synonyms
Oligotrophus ulmi.
references
Barnes (1951a), Béguinot (2002a, 2006b, 2012a), Bruun (2015a), Buhr (1965a), Dauphin & Aniotsbehere (1997a), Gagné (2010a), Kieffer (1909a), Kowalski (2004a) , Lambinon Schneider & Feitz (2012a), Möhn (1955a), Redfern & Shirley (2011a), Roskam (2009a), Roskam & Carbonnelle (2015a), Simova-Tošić & Skuhravá (2001a), Simova-Tošić, Skuhravá & Skuhravý (1996a, 2000a, 2004a, 2007a), Simova-Tošić, Skuhravá, Skuhravý & Postolovski (2007a), Skrzypczyńska (2007a), Skuhravá & Skuhravý (1988a, 1994a,b, 1997a,b, 1999a,b, 2005c, 2006a, 2007a, 2008a, 2010a, 2012a, 2021a: 291), Skuhravá, Skuhravý, Dauphin & Coutin (2005a), Skuhravá, Skuhravý, Dončev & Dimitrova (1991a, 1992a), Skuhravá, Skuhravý & Hellrigl (2001a), Skuhravá, Skuhravý & Jørgensen (2006a), Skuhravá, Skuhravý & Meyer (2014a), Skuhravá, Skuhravý & Neacsu (1972a), Skuhravá, Skuhravý, Skrzypczyńska & Szadziewski (2008a), Sylvén (1983a), Tomasi (2014a).