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Early Cambrian priapulid worms buried with their lined burrows

2006; Cambridge University Press; Volume: 143; Issue: 5 Linguagem: Inglês

10.1017/s0016756806002445

1469-5081

Xiguang Zhang, Xianguang Hou, Jan Bergström,

Geological formations and processes

Five specimens of the priapulid Maotianshania cylindrica preserved inside their lined burrows were described from the Lower Cambrian Chengjiang deposits near Kunming, southern China. The exceptional preservation suggests that this worm made a dwelling tube by lining within the uppermost sediment layers. This seems to be unique among priapulids in comparison with the Cambrian Selkirkia and Paraselkirkia , as well as some modern priapulid larvae and loriciferans. Taphonomic evidence indicates that the burrow-and-worm specimens are not buried in situ but were moved by storm, tsunami, or turbidity generated currents that are thought to have brought sedimentary material intermittently.