Figure 2. Global paleogeographic distribution of actinocerid nautiloids in the Middle Ordovician: 1. Xainza region, North Tibet; 2. Nyalam, South Tibet; 3. Inner Mongolia, North China; 4. Liaoning, North China; 5. Guizhou, South China; 6. Shan Plateau, Myanmar; 7. Southern Thailand; 8. Langkawi Islands, Malaysia; 9. Queensland, North Australia; 10. Tasmania (Tas. for short in the figure), Australia. Base map of paleogeographic reconstruction is modified from Burrett et al. (2014). Light blue=relatively shallow platform and shelf seas; dark blue=relatively deep shelf seas; yellow=land or submarine highs.