Pegomya terebrans (Rondani, 1866)

Diptera, Anthomyiidae

mine

The full grrown mine is an upper-surface elongate blotch overlying the midrib, quite homogenous in depth, and very irregular in shape. Equally irregular branches radiate into the leaf. Frass in very numerous, extremely small granules that form a shadow line along the midrib, to a lesser extent also the side veins. The larva can make several mines; the first one begins at a lower-surface white egg shell. Pupation external.

hostplants

Asteraceae, oligophagopus

Carduus acanthoides; Cirsium creticum; Cynara.

phenology

Occupied mines were found between late April and late May (Hering, 1967a).

distribution within Europe

The published records stem from southern France, Croatia and Romania.

synonyms

Hering associated the mine with “Pegomya nigricornis Strobl, 1901”. The year must be a mistake, because the name was published by Strobl in 1909, as Pegomyia hyoscyami var. nigricornis. Material bred by Hering was identifiedf by Hennig, who some years later synonymized nigricornis with terebrans (Hennig, 1973a).

notes

The mines strongly resemble those of Agromyza apfelbecki; they may occur on the same plant, even on the same leaf. The mine of apfelbecki obviously does not start at a visible egg shell; the mine is much less regular in depth, and the majority of the frass grains, that are coarser, lie on top of the midrib.

references

Drăghia (1968a), Hering (1967a).

08/06/2010