Phytomyza griffithsi Spencer, 1963
Plantago major, Lage Mierde
Several eggs are deposited on the blade. From there narrow corridors descend in the direction of the petiole. Once they have arrived there, the larvae start making broad lobate corridors that fan out over the basal half of the leaf. Later parts of the mine are party upper-surface, partly interparenchymatous, looking pale green. In the shallow parts primary feeding lines often visible. Frass in widely dispersed grains. According to Buhr (1964a) older mines often turn black. Pupation within the mine, often in the petiole. Puparium generally at the lower surface; the front spiracula penetrate the epidermis.
Plantago major, media.
Larvae in July-November (Buhr, 1964a).
BE recorded (Mortelmans ao, 2014a).
NE observed (Ellis, several localities).
LUX not recorded (Fauna Europaea, 2008).
distribution within Europe
From Lithuania to the Pyrenees and the Alps, and from the UK to Poland and Czechia (Fauna Europaea, 2008).
The literature about Plantago-miners is complicated by the fact that the description and illustration of Ph. plantaginis in Hering (1957a) in fact refers to Ph. griffithsi. This is corrected by Spencer (1972a) who copies Hering’s drawing, but incorrectly indicates that one part of it illustrates a mine of plantaginis, another part a griffithsi mine. To complicate matters further, it has turned out that also Ph. plantaginis on Plantago majormedia, makes mines that strongly reminds those of griffithsi.
Found by me in the Netherlands at several locaties, including the vey centre of Amsterdam, in all cases on Plantago major. According to Griffiths and Buhr the species lives on op Pl. media only.
Mines frequently occur in plants that are heavily trodden (Buhr, 1964a); this is my experience in the Netherlands too.
Buhr (1964a), Černý & Merz (2007a), Černý & Vála (2006a), Edmunds (2022b), Hering (1957a), Mortelmans, Boeraeve, Tamsyn ao (2014a), Pakalniškis (1998a), Spencer (1963a, 1972a), von Tschirnhaus (1999a).