Hyalogonium klebsii (Klebs) Pascher,1927, a colorless volvocid flagellate with two equal anterior flagella. The body is elongate and fusiform. A red stigma is present on the left. Many small starch grains are seen in the cytoplasm.The nucleus is central. This genus may be confused with the euglenid Cyclidiopsis but Hyalogonium is smaller, biflagellate with thinner flagella, and lacks large paramylon bodies and the anterior canal opening. From standing rainwater pool near Boise, Idaho December 2005. DIC.