Cochylis nana (Haworth, 1811)
birch conch
on Betula
gall
the larva, a caterpillar, lives during the summer in a female catkin, that may become somewhat disfigured; in autumn pupation follows in a bark fissure.
host plants
Betulaceae, monophagous
Betula pendula, pubescens.
larva
Boy dirty yellowish-white; head brown; prothoracic plate brownish, rear part darkly punctuated; see Swatschek.
synonyms
Acornutia, Conchylis, Thyraylia, nana.
references
Bradley, Tremewan & Smith (1973), Buhr (1964a), Disqué (1905a), Hancock & Bland (2015b), Kovács & Kovács (2020a), Swatschek (1958a).