Ancient lakes are among the best archivists of past environmental change, having
experienced more than one full glacial cycle, a wide range of climatic conditions, tectonic …

Patterns that maintain and generate biodiversity of macro‐organisms in the Neotropics are
widely discussed in the scientific literature, yet the spatial ecology of micro‐organisms is …

How fast is evolution, and why does it matter? The rate of evolution, and whether it is
gradual or punctuated, is a hotly debated topic among biologists and paleontologists. This …

High-elevation tropical lakes are excellent sentinels of global change impacts, such as
climate warming, land-use change, and atmospheric deposition. These effects are often …

Fossil sequences provide observations of phenotypes within a lineage over time and
represent essential data for increasing our understanding of phyletic evolution beyond …

Comparing relative fit of different models of evolutionary dynamics to time series of phyletic
change is a common tool when interpreting the fossil record. However, a measure of relative …

Extrapolating microevolutionary models does not always provide satisfactory explanations
for phenotypic diversification on million-year time scales. For example, short-term …

The spherical encompassing final chamber of the planktonic foraminifera Orbulina universa
is a prime example of a complex character whose evolution has been documented by a …

Is speciation generally a “special time” in morphological evolution, or are lineage-splitting
events just “more of the same” where the end product happens to be two separate lineages …

Two new araphid diatom (Bacillariophyta) species, Pseudostaurosira oliveraiana sp. nov.
and Staurosira catamarcensis sp. nov. are described from fossil material taken from the …