Abstract: This paper reviews the naming changes of two Frustulia species and provides two new Chinese names for them: F. asiatica and F. amphipleuroides. Based on the observation of the light and scanning electron microscopy on the above two species, we find that: (1) the unique feature combination of F. asiatica is its linear-lanceolate valve shape and higher stria density; (2) the unique feature combination of F. amphipleuroides is 0~3 isolated poroids and obviously elongated central area.

Key words: Gaowangjie National Nature Reserve, Longitudinal rib, Longitudinal striae, Y-shaped end