Scientific Reports 7: Article number: 42616; published online: 17 February 2017; updated: 09 May 2017

This Article contains errors in Figure 7. The correct Figure 7 appears below as Figure 1 with a corrected Figure legend and additional references:

Figure 1
figure 1

Palaeobiogeographical distribution of major groups of Lower Palaeozoic Artiopoda during the Cambrian and Ordovician. Xandarella mauretanica sp. nov. represents the only member of Xandarellida reported outside South China, and expands the distribution of this clade to the Southern Hemisphere. References for Cambrian localities: Laurentia23,39,51,58–61; North Greenland40,62; Morocco (this study); South China2,63–65; South Australia9,10,66; Tasmania67. References for Ordovician localities: Wales69,70; Morocco54,56,71; South Africa72; Sardinia1; Czech Republic2,68. Palaeocontinental reconstructions based on Torsvik and Cocks73 (Fig. 2.8, 2.11) using Adobe Illustrator CC 2015.3 (http://www.adobe.com/uk/products/illustrator.html).