Plant Parasites of Europe

leafminers, galls and fungi

Arnoldiola gemmae

Arnoldiola gemmae (Giraud, 1868)

on Quercus

Arnoldiola gemmae and cf Lestodiplosis necans larvae

Quercus robur / Andricus foecundatrix, gall, Belgium, prov. Namur, Couvin, Aublain © Sébastien Carbonnelle

Arnoldiola gemmae and cf Lestodiplosis necans larvae

other specimens; the smaller larve in both pictures in all probability is Lestodiplosis necans

Arnoldiola gemmae: cocoon

Quercus sp., Denmark © Simon Haarder: cocoon in gall of Andricus foecundatrix

Andricus foecundatrix: larva

larva, dissected out of the cocoon


inquiline in the galls of Andricus foecundatrix on oak. Bivoltine, pupation within the gall in a white cocoon.


Arnoldiola gemmae: spatula

prosternum with spatula (from Möhn, 1955a)


Cecidomyia gemmae Rübsaamen, 1892.


In the literature the larve is described as being white. Because according to the literature no other cecidomyiid inquiline is known from foecundatrix galls, the Danish material is an unknown species. Possibly it is not a true inquiline, but a detritiphagous species.


A. gemmae is predated upon by Lestodiplosis necans.


Gagné (2010a), Möhn (1955a), Rübsaamen (1892a), Skuhravá & Skuhravý (2007a, 2021a: 213), Skuhravá, Skuhravý, Dauphin & Coutin (2005a). Skuhravá, Skuhravý & Dengler (1997a), Skuhravá, Skuhravý, Dončev & Dimitrova (1991a, 1992a), Skuhravá, Skuhravý & Jørgensen (2006a), Skuhravá, Skuhravý & Meyer (2014a).

Last modified 2.x.2021