Sun, X.-X., Wang, L., Li, N., Sluys, R., Liu, D.-Z., Dong, Z.-M. & Chen, G.-W. (2024) Two species of Polycelis (Platyhelminthes, Tricladida, Planariidae) newly recorded for the Qinling Mountains and the Loess Plateau in China, with a comparative discussion on their karyotypes. Zootaxa, 5536 (4), 581–599.