Periodic Table of Niches (IMAGE) University of Texas at Austin Caption Three-dimensional depiction of the Periodic Table of Niches. Each box represents a lizard niche (n1-n12). Species pairs from different geographic regions or different evolutionary lineages (clades) independently evolve traits allowing them to effectively use similar niches in their respective habitats (ecological convergence). Two such convergent pairs are indicated. 1) Blue lines indicate the convergent pair Phrynosoma from North America and Moloch from Australia, and 2) Green lines indicate the convergent pair Polychrus from Brazil and Chamaeleo from Africa. In reality, ecological niches are multidimensional. Credit University of Texas at Austin Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.