Plant Parasites of Europe

leafminers, galls and fungi

Schizomyia galiorum

Schizomyia galiorum Kieffer, 1889

on Galium

Schizomyia galiorum: galls on Galium verum

Galium verum, Belgium, prov. Limbourg, Maasmechelen, Maesbempder Greend, 18.ix.2020 © Carina Van Steenwinkel

Schizomyia galiorum: opened gall

opened gall with larvae

Schizomyia galiorum: larva

head and sternum, with spatula

Schizomyia galiorum: larva

spatula with adjacent papillae

Schizomyia galiorum: larva

the terminal segment bears a pair of vertical thorns

Schizomyia galiorum: larva

entire larva, dorsal, to show the position of the thorns.

Schizomyia galiorum: larva


Schizomyia galiorum: galls on Galium verum

Galium verum, galls (from Houard, 1909a)

Schizomyia galiorum: gall on Galium verum

Galium verum, Belgium, prov. Luxembourg, Durbuy, la vieille Briqueterie de Rome, 18.vii.2015 © Carina Van Steenwinkel

Schizomyia galiorum: gall on Galium mollugo

Galium mollugo, Belgium, prov. Liège, Tihange © Jean-Yves Baugnée

Schizomyia galiorum gall on Galium mollugo

Galium mollugo, Belgium, prov. Liège, Ben-Ahin, Lovegnée-Bosquet, 4.x.2011 © Jean-Yves Baugnée


The gall is distinguished from the one of Aceria galiobia (that also may occur in the inflorescence) by the fact that the flower bud is strongly enlarged, but nevertheless remains recognisable as such. One to three orange larvae share a gall. Inside of the gall lined with nutritive mycelium. There are two generations per year. Skuhravá, Skuhravý & Jørgensen (2006a) write that full-grown larvae leave the gall to pupate in the ground, but Redfern & Shirley (2011a) maintain that also pupae may be found in the galls.

host plants

Rubiaceae, oligophagous

Asperula ciliata, cynanchica, purpurea; Cruciata glabra; Galium album, aristatum, broterianum, debile, glaucum, intermedium, lucidum, mollugo, odoratum, pumilum, rubrum, saxatile, sylvaticum, verum; Rubia peregrina.


Schizomyia galiorum: spatula

spatula with papillae (from Möhn, 1955a)


Trotteria galii.


Béguinot (2001c, 2002e, 2007b, 2012a), Bellmann (2012a), Bennalick (2012a), Blanes-Dalmau, Caballero-López & Pujade-Villar (2017a), Bruun (2015a), Buhr (1964b, 1965a), Burton, Ellis & Schneider (2022a), Cogolludo (1921a), Dauphin & Aniotsbehere (1997a), Dietrich (2016a), Gagné (2010a), Houard (1909a), Kieffer (1901a), Lambinon, Carbonnelle & Claerebout (2015a), Lehmann & Hannover (2016a), Máca (2012a), Mik (1889a), Möhn (1955a), Redfern & Shirley (2011a), Rohfritsch (1992a, 2008a), Roskam (2009a), Roskam & Carbonnelle (2015a), Simova-Tošić & Skuhravá (2001a), Simova-Tošić, Skuhravá & Skuhravý (1996a, 2000a, 2004a, 2007a), Simova-Tošić, Skuhravá, Skuhravý & Postolovski (2007a), Skrzypczyńska (2007a), Skuhravá (2006a), Skuhravá & Skuhravý (1988a, 1992b, 1994a,b, 1997a, 1999a,b, 2005c, 2006a, 2007a, 2008a, 2009a,b, 2010a,b, 2012a, 2021a: 117), Skuhravá, Skuhravý, Blasco-Zumeta & Pujade-Villar (2006a), Skuhravá, Skuhravý, Dauphin & Coutin (2005a), Skuhravá, Skuhravý, Dončev & Dimitrova (1991a, 1992a), Skuhravá, Skuhravý & Hellrigl (2001a), Skuhravá, Skuhravý & Jørgensen (2006a), Skuhravá, Skuhravý & Meyer (2014a), Skuhravá, Skuhravý & Neacsu (1972a), Skuhravá, Skuhravý, Skrzypczyńska & Szadziewski (2008a), Tavares (1905a), Tomasi (2014a).

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