Trachys minutus (Linnaeus, 1758)

Trachys minutus: mine on Corylus avellana

Corylus avellana, Belgium, prov. Namur, Lavaux-Sainte-Anne, Gros Tienne © Carina Van Steenwinkel

Trachys minutus: mine on Salix cinerea

Salix cinerea, Belgium, prov. Antwerp, Mol © Carina Van Steenwinkel

Trachys minutus: larva in mine

same leaf, larva in the mine

Trachys minutus: pupa in mine

a few days later, the larva has pupated

86388638

Ulmus minor, Susteren

Trachys minutus larva

Salix spec., België, prov. Limbourg, de Hoefaert-Lanaken © Carina Van Steenwinkel: larva, ventral

Trachys minutus pupa

fresh pupa (it will turn later to almost black)

Trachys minutus: mine on Tilia spec.

Tilia spec., Belgium, prov. Limburg, Zelem, Sint-Jansberg © Carina Van Steenwinkel

Trachys minutus: occupied mine on Tilia spec.

this mine bears a treacherous similarity with the one of Roeslerstammia erxlebella,

Trachys minutus: occupied mine on Tilia spec.

but the droplet,

Trachys minutus: larva in mine on Tilia spec.

and the spotted larva make the difference

mine

Full depth blotch, invariably beginning at the leaf tip or the tip of a leaf lobe or tooth. Oviposition site covered by a black, shining drop of hardened secretion. Frass generally in long threads, but sometimes in elongated granules. Pupa in the mine, not in a cocoon.

hostplants

polyphagous on woody plants

Acer campestre; Betula; Carpinus betulus; Corylus avellana; Crataegus monogyna; Frangula alnus; Malus sylvestris; Prunus; Pyrus communis; Salix alba, aurita, caprea, cinerea & cinerea subsp. oleifolia, myrsinifolia; Sorbus aria, aucuparia; Tilia cordata, platyphyllos; Ulmus laevis, minor.

Starý (1930a) also mentions Populus tremula.

phenology

Larvae found between mid May and mid August. According to Robbins (1991a) bivoltine: early summer and late summer.

BENELUX

BE observed (Fauna Europaea, 2007).

NE observed (Vorst, 2009a); uncommon, mainly found in the southern and eastern parts of the country.

LUX observed (Ellis).

distribution within Europe

All of Europe except Ireland (Fauna Europaea, 2007).

larva

Bilý (1982a, 1993a, 1994a), Brechtel & Kostenbader (2002a), Niehuis (2004a).

pupa

notes

Hibernation as imago, in the leaf litter (Bilý, 2002a).

references

Beiger (1979a), Bilý (1982a, 1993a, 1994a, 2002a), Brechtel & Kostenbader (200a), Buhr (1933a, 1964a), Cobos (1986a), Csóka (2003a), Drăghia (1972a), Haase (1942a), Hartig (1939a), Hering (1923a, 1930a,e, 1932g, 1957a), Kollár (2007a), Kollár & Hrubík (2009a), Maček (1999a), Michalska (1972a, 1976a), Niehuis (2004a), Robbins (1991a), Sánchez Sobrino & Tolosa Sánchez (2005a), Schaefer (1949a), Skala (1951a), Stammer (2016a), Starý (1930a), Stolnicu (2008a), Théry (1942a), Tomov & Krusteva (2007a), Ugarte san Vicente ao (2006a), Ureche (2010a), Vorst (2009a).

31/03/2017

mod 4.viii.2017