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fossil record, but knowledge about their non-mineralized parts, including the digestive system, is still very scanty. Babcock (2003), Lerosey-Aubril et al. (2011) and Robison & Babcock (2011) reviewed all earlier data on the gut of trilobites. Some 25 species having guts preserved were newly reported in Robison & Babcock (2011). English & Babcock (2007) provided information on digestive tracts preserved in Ordovician trilobite material that was overlooked in previous years. Even with the addition of the paper of Lerosey-Aubril et al. (2011), not all species were reviewed, but in total, those papers account for, directly or by way of reference, about 50 species. Additional information on Cambrian species from Utah that have preserved guts was recently published also by Robison et al. (2015). However, the information on exceptionally preserved trilobites has increased in the last years due to intensive study of several Ordovician and particularly Cambrian Lagerstätten (e.g. Robison & Babcock 2011; Lerosey-Aubril et al. 2011, 2012a, b, 2017; Eriksson & Terfelt 2012; Fatka et al. 2013a, b, 2015; Zhu et al. 2014; Gutiérrez-Marco et al. 2017; Hopkins et al. 2017). Remains of the digestive system in Cambrian trilobites have been known from almost ten Konservat-Lagerstätten of four major areas – Laurentia, Baltica, West Gondwana and East Gondwana. The aim of the present paper is to describe and illus trate an exceptionally preserved specimen of the trilobite Lioparia bassleri recently collected from the Manto Formation, North China (Sun & Yuan, 2015). This spe-

bulletin of geosciences

Fossilized gut of the trilobite Lioparia bassleri and the distribution of exceptional preservation in the Cambrian Stage 4-Drumian Manto Formation of North China