About Andricus grossulariae Giraud, 1859
Andricus grossulariae Giraud, 1859 is a species of gall wasp. It forms two different types of galls through alternating phases of its life cycle. Agamic (asexual) individuals produce acorn cup galls on the acorn cups of oak trees, formed in late summer. Sexual phase individuals produce rounded galls on oak catkins, formed in spring. Its recognized synonyms are Andricus fructuum (Trotter, 1899), Andricus gemellus (Belizin & Maisuradze, 1961), Andricus intermedius (Tavares, 1922), Andricus mayri (Wachtl, 1879), and Cynips panteli (Kieffer, 1897). This gall wasp has been recorded across much of Europe, ranging from Ireland to Portugal and east to Turkey. It also occurs in parts of the Near East, reaching as far south and east as northern Iraq. It was first recorded in Britain in the county of Berkshire in 2000.
