Hydrurus foetidus (Chrysophyceae): an update and request for observations

Abstract

Hydrurus foetidus is a cold-water golden alga (Chrysophyceae) found in fast-flowing rivers mainly during time of snowmelt. It has primarily been studied by scientists located near alpine or northern locations, but there are also observations both in south and north America, Russia, Japan, in the Hope Bay area (Antarctica) and Himalaya. If and where environmental conditions are appropriate, Hydrurus may be distributed “worldwide.” More information is wanted from areas where its presence may be expected.