Takahashi, S.; Yamakita, S.; Suzuki, N. (2019). Natural assemblages of the conodont Clarkina in lowermost Triassic deep-sea black claystone from northeastern Japan, with probable soft-tissue impressions. Palaeogeography, Palaeoclimatology, Palaeoecology. 524: 212-229.
Natural assemblages of the conodont Clarkina in lowermost Triassic deep-sea black claystone from northeastern Japan, with probable soft-tissue impressions