480 FOSSIL VERTEBRATES/Reptiles Other Than Dinosaurs Figure Early amniote phylogeny The pattern of solid and dotted lines represent evolutionary relationships of the various taxa known from the fossil record The solid lines with the taxonomic units to their right represent the known fossil record of those particular taxa For example the fossil record of the Diadectomorpha extends from the Permo Carboniferous boundary throughout Lower Permian strata The dotted lines represent reconstructed histories of particular taxa (also called ghost lineages) These are based on the combination of the known earliest appearance of certain lineages, and the proposed pattern of evolutionary relationships For example, the known record of Eothyrididae extending to the Permo Carboniferous boundary automatically creates a long ghost lineage for Caseidae, whose record only starts towards the top or the Lower Permian Figure Procolophon This small parareptile is known from the Early Mesozoic, Lower Triassic sediments of Gondwana