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This article discusses a study which estimated the genome size for four species of pterosaurs and seven species of basal archosauromorphs using a Bayesian comparative approach. It also measured the osteocyte lacunae of these species using palaeohistological samples. Results showed that bats evolved smaller sized genomes than other mammals when controlled for phylogeny. According to the study's hypothesis, there is a relationship between cell size and genome size. Results of the estimates showed that pterosaur genome sizes are within the upper quartile of the avian range, while the basal archosauromorphs are close to the average living crocodylians. The study found no significant relationship between body size and genome size in tetrapods.