#3525 · 🐝 bees, wasps & ants

Oak Artichoke Gall Wasp

🇳🇱 Ananasgalwesp ·Andricus foecundatrix

🐝 Bees, wasps & ants 📍 in the Netherlands

9 photos from iNaturalist (Creative Commons) · credits & licences

what is it?

Andricus foecundatrix (formerly Andricus fecundator ) is a parthenogenetic gall wasp which lays a single egg within a leaf bud, using its ovipositor, to produce a gall known as an oak artichoke gall , oak hop gall , larch-cone gall or hop strobile The gall develops as a chemically induced distortion of leaf axillary or terminal buds on pedunculate oak ( Quercus robur ) or sessile oak ( Quercus petraea ) trees.

base stats

NL sightings 211iNaturalist, research grade
worldwide 7,896iNaturalist observations

Bars compare against all animals on log scales: up to 300,000 Dutch and 600,000 worldwide sightings (the most-seen species), 150 t (blue whale), 30 m and 400 years (Greenland shark).