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	Date/Time	Thumbnail	Dimensions	User	Comment
current	12:30, 22 January 2009		405 × 326 (36 KB)	commons>Haplochromis	{{Information \|Description={{en\|1=Heterostracans are the most diverse group of pteraspidomorphs and lived during the Silurian and Devonian periods. Among the most primitive heterostracans are tolypelepids (top right). Most heterostracans are pteraspidifor

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