Great Basin Naturalist


Five species of Naididae (Ophidonais serpentina, Uncinais uncinata, Arcteonais lomondi, Dero (Dero) digitata, and Slavina appendiculata) and six species of Tubificidae (Tasserkidrilus harmani, Aulodrilus limnobius, A. pluriseta, A. pigueti, A. americanus, and Branchiura sowerbyi) are reported for the first time from Washington. T. harmani, A. pigueti, and A. americanus are also new to the fauna of the western United States. Descriptions and distribution ranges are provided for the new records. A checklist of the freshwater species occurred in Washington is presented.