Urtica dioica, Duin en Kruidberg: frass in a long thread

Urtica dioica, Nieuwendam: mine full depth, with vague primary and secondary feeding lines

Urtica dioica, Belgium, prov. East Flanders, Oudenaarde, bos t’Ename © Carina Van Steenwinkel

frass usally partly as a hair-thin thread

mine

Full depth (unusual, for an agromyzid) mine with indistinct primary and secondary feeding lines. Generally the mines lies in the centre of the leaf. The mine starts as a narrow corridor, strongly, ‘intestine-like’, wound (unless the mine lies near the leaf margin, in which case the first part of the corridor follows the leaf margin). Furtheron the corridor widens into an elongated blotch. Part of the frass in a long fine thread. In comparision with the other two Agromyza‘s on Nettle the mine is much clearer, less green-cloudy. Pupation outside the mine.

hostplants

Urticaceae, oligophagous

Parietaria officinalis; Urtica dioica, pilulifera, radicans, urens.

Urtica is the most important hostplant by far. Mentioned by Maček (1999a, Slovenia) also from Humulus lupulus.

phenology

In two generations: larvae in May-June and September-October. In most years very common.

BENELUX

BE recorded Scheirs, De Bruyn & von Tschirnhaus (1996a).

NE recorded (de Meijere, 1924a).

LUX not recorded (Fauna Europaea, 12007).

distribution within Europe

From Scandinavia to Spain, and from Ireland to Poland Serbia (Fauna Europaea, 2007; Černý & Merz, 2006a; Gil Ortiz, 2009a).

larva

puparium

synonyms

Agromyza freyi Hendel, 1931.

references

Beiger (1955a, 1960a, 1965a, 1970a, 1979a), Beuk (200a), Bland (1992b), Buhr (1932a, 1964a), Černý (2001a, 2011a), Černý & Merz (2005a, 2006a, 2007a), Černý & Vála (1999a), Černý, Vála & Barták (2001a), Ci̇velek, Çikman & Dursun (2008a), Civelek, Tonguc, Ozgul & Dursun (2007a), Dempewolf (2001a), van Frankenhuyzen Houtman & Kabos (1982a), Gil Ortiz (2009a), Gil-Ortiz, Martinez & Jiménez-Peydró (2010a), Griffiths (1962a), Hering (1955b, 1957a), Kabos (1971a), Maček (1999a), Manning (1956a), de Meijere (1924a, 1939a), Michalska (1970a, 1972a, 1976a), Niblett (1956a), Nowakowski (1954a, 1964a), O’Connor (2001a), Pakalniškis (1990a), Papp & Černý (2015a), Robbins (1991a), Scheirs, De Bruyn & von Tschirnhaus (1996a, 1999a), Skala & Zavřel (1945a), Sønderup (1949a), Spencer (1953a, 1972a, 1976a), Starke (1942a), Starý (1930a), Surányi (1942a), von Tschirnhaus (1999a), Ureche (2010a), Zoerner (1969a).