Marshall et al. recently estimated population densities, range sizes, instant and cumulative
total population sizes for Tyrannosaurus rex with narrow ranges of uncertainly. I revisit the …

Although much can be deduced from fossils alone, estimating abundance and preservation
rates of extinct species requires data from living species. Here, we use the relationship …

Among extant species, the ability to sample the extremes of body size—one of the most
useful predictors of an individual's ecology—is highly unlikely. This improbability is further …

I present a simulation model on vital statistics, absolute abundance (N, total number of
individuals that ever lived) and preservation rate (p, minimum number of fossils known …

SDM describes a family of methods aiming to predict the geographic distribution of
organisms using environmental data such as climate variables. It is a versatile tool in …

Codron et al.[1] invoke an ecological model of size-specific competition in dinosaurs to
explain an apparent bimodal distribution within Dinosauria, and find 'intermediate-sized …

The fossil record is a rich source of information about biological diversity in the past.
However, the fossil record is not only incomplete but has also inherent biases due to …

The fossil record is a rich source of information about biological diversity in the past.
However, the fossil record is not only incomplete but has inherent biases due to geological …

Despite current interest in estimating the diversity of fossil and extant groups, little effort has
been devoted to estimating the diversity of dinosaurs. Here we estimate the diversity of …

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