Taxonomy PolyphagaHydrophiloideaHelophoridaeHelophorusTrichohelophorusHelophorus alternans Description Distribution (may take a minute to appear) Distribution Map Your browser does not support iframes, but you can visit <a href="https://easymap.nbnatlas.org/EasyMap?tvk=NHMSYS0001718414&w=367&title=0">Distribution Map</a>