Palaeobiology of Middle Paleozoic Marine Brachiopods
Fossil species appear to persist morphologically unchanged for long intervals of geologic time, punctuated by short bursts of rapid change as explained by the Ecological Evolutionary Units (EEUs). Here, morphological variation in Paleozoic atrypide morphology at the subfamily level (Atrypinae and Variatrypinae) from the Silurian and Devonian time intervals in the third Paleozoic EEU (~444-359 my) were investigated using relatively new techniques of quantitative modeling. The study explains how a group of closely related taxa in atrypide subfamilies exhibit morphological conservation through time in P3 EEU within the Eastern North America region.
Explores novel techniques like landmark analysis in geometric morphometrics as an advancement to long known traditional morphometrics Describes taxonomic identifications to examine the biodiversity of Paleozoic extinct marine brachiopods Presents the idea that morphology of ancient shells can be appropriately used to interpret their diversity, taxonomy, ecology and evolutionary patterns in time and space