Phytoptus tetratrichus (Nalepa, 1890)
on Tilia
Tilia tomentosa, Hungary, Budapest, 28.v.2021 © László Érsek
detail
galled leaf, underside
section through a gall
Tilia tomentosa, Schiedam, 7.v.2014 © Ben van As
Tilia tomentosa, France, Rhône-Alpes, Haute-Savoie, Saint-Gervais-les-Bains, 8.vii.2011 © Arnold Grosscurt
underside of the leaf
reddish brown spots at the underside of the leaf correspond with erinea at the upper side
Tilia tomentosa, Hollandsche Rading: upper side
underside
underside, detail
Tilia sp., Germany, Bavaria, Lengfurt am Main, 22.vi.2012 © Arnold Grosscurt
gall
Only the deuterogyne stage causes galls, that differ according to the hostplant: narrow rolls of the leaf margin in Tilia cordata and cordata x americana, small wart-like galls at the upper surface, and small round erinea at the underside of the leaf in T. tomentosa, irregular finger-like galls at either side of the leaf in T. americana.
hostplants
Malvaceae,monophagaous
Tilia americana, cordata, x flavescens, tomentosa.
Emphatically not mentioned from T. platypyhllos by Soika.
Mentioned by Houard also from T. x europa, platyphyllos subsp. cordifolia.
synonyms
Phytocoptella tetratrichus
Upper surface, wart-like galls, at the underside covered by an erineum, are attributed to Phytoptus abnormis Garman, 1883 in the Dutch cecidological literature, to Ph. erinotes (Nalepa, 1918) by the British. Probably this is incorrect, and must these galls too be attributed to tetratrichus.
references
Béguinot (2007b), Buhr (1965a), Burton, Ellis & Schneider (2022a), Chinery (2011a), Dauphin & Aniotsbehre (1997a), Farkas (1965a), Hellrigl (2006a, 2010a), Houard (1909a), Jočić & Petanović (2012a), Kielkiewicz, Soika & Olszewska-Kaczynska (2011a), Kollár (2007a, 2011a), Koops (2013a), Lambinon Schneider & Feitz (2012a), Lehmann & Flügel (2012a), Petanović (1998a), Petanović & Stanković (1999a), Redfern & Shirley (2011a), Ripka (2007a), Roivainen (1947a), Roskam (2009a), Skoracka, Lewandowski & Boczek (2005a), Soika (2006a, 2020a), Soika & Kozak (2011a, 2012a), Sylvén (1960a), Tomasi (2014a), Vaněčková-Skuhravá (1996a), Weidner (1954a).