Pegomya solennis (Meigen, 1826)

on Rumex, etc.

9491

Rumex obtusifolius, Nieuwendam

8162

Rumex obtusifolius, Buikslotermeer: young mine, light from behind

Pegomya solennis, entrance hole

Rumex acetosa, Nijmegen: when a larva has left its mine and reenters elsewhere in a leaf, this is how the entrance opening may look like

Pegomya solennis: larva in secondary mine

Rumex obtusifolius, Biddinghuizen, Spijk- en Bremerbergbos © Hans Jonkman: larva in a secondary mine

Pegomya solennis: living larva

Rumex obtusifolius, Belgium, prov Antwerp, Schor van Ouden Doel; © Kris Peeters: living larva; the rear spiracula are clearly visible

mine

At the start of the mine at the leaf under surface a group of about 5 oval white egg shells (just 1 on the small leaves of Rumex acetosella). The emerging larvae initally work shoulder to shoulder in making a broad corridor. Later they split up, making a large blotch, that often is enlarged even more by fusion with other mines. The mine is practically full depth. Frass blackish-green, often deliquescent. The larvae can leave a mine and restart elsewhere. Pupation outside the mine.

hostplants

Polygonaceae, narrowly oligophagous.

Emex spinosa; Oxyria digyna; Persicaria; Rumex acetosa, acetosella, alpestris, alpinus, aquaticus, chrysocarpos, conglomeratus. cordifolius, crispus, hydrolapathum, hymenosepalus, maritimus, obtusifolius, palustris, patientia, pseudonatronatus, pulcher, salicifolius, scutatus.

Only rarely on Persicaria; Rumex obtusifolius is the main hostplant. Buhr (1933a) mentions an uncertain observation on Rheum undulatum.

phenology

Larvae from May to September.

BENELUX

BE recorded (Gosseries & Ackland, 1991a).

NE recorded (de Meijere, 1939a); very common.

LUX recorded (Ellis: Kautenbach).

distribution within Europe

Entire Europe, except the Iberian Peninsula and Corsica (Fauna Europaea, 2008).

egg

larva

puparium

synonyms

Pegomya versicolor (Meigen, 1826); P. nigritarsis (Zetterstedt, 1838).

notes

Van Frankenhuyzen & Freriks (1970b) give details about the biology.

references

Amsel & Hering (1931a, 1933a), Beiger (1958a, 1960a, 1965a, 1970a, 1979a, 1980a), Beuk, Prijs & de Jong (2002a), Buhr (1930a, 1933a, 1964a), Drăghia (1968a,,1972a), Dušek (1970a), van Frankenhuyzen & Freriks (1970b), van Frankenhuyzen, Houtman & Kabos (1982a), Godfray (1986a), Haase (1942a), Hartig (1939a), Hering (1923a, 1936b, 1957a, 1962a, 1967a), Huber (1969a), Kabos (1975a), Kvičala (1938a), Maček (1999a), de Meijere (1895a, 1939a), Michalska (1970a, 1976a), Niblett (1956a), Nowakowski (1954a), Pakalniškis (1983a), Robbins (1991a), Skala (1951a), Skala & Zavřel (1945a), Sønderup (1949a), Stammer (2016a), Starý (1930a), Stork (1936a), Suwa (1974a), Teschner (1999a), Ureche (2010a), de Vos-de Wilde (1935a), Zoerner (1969a, 1970a).

mod 7.vi.2018