Gastrophysa polygoni

{{Short description|Species of beetle}}

{{Speciesbox

| image = Gastrophysa (Gastrophysa) polygoni 03.JPG

| image_caption = Female Gastrophysa polygoni

| genus = Gastrophysa

| species = polygoni

| authority = (Linnaeus, 1758)

}}

Gastrophysa polygoni is a species of leaf beetle in the subfamily Chrysomelinae. It was described by Carl Linnaeus in 1758.{{cite web|url=http://bugguide.net/node/view/23860/tree/all|title=Gastrophysa|publisher=BugGuide|access-date=9 September 2013}} The species can be up to 5mm long and is green-blue in colour. The thorax is orange and the wing cases are a metallic green, and the beetle can be seen in spring and summer.{{cite web|url=http://www.naturespot.org.uk/species/gastrophysa-polygoni|title=Gastrophysa polygon|publisher=NatureSpot|access-date=9 September 2013}}