Original dataset, coded matrix, and Bayesian phylogenetic trees of three Late Ordovician brachiopod genera (Atrypida: Anazygidae)

The Late Ordovician was a pivotal interval in Earth’s history, marked by rapid diversification and a significant accumulation of biodiversity across marine ecosystems. This period witnessed the flourishing of brachiopods, which were a dominant component of the Paleozoic Evolutionary Fauna—a group primarily composed of filter-feeding, sessile benthic organisms that played a critical role in the structure and function of Paleozoic marine communities. In this study, we focus on reconstructing the evolutionary relationships and biodiversity dynamics of a key lineage within this group: the atrypid brachiopods of the family Anazygidae. This family includes the genera Anazyga, Catazyga, and Zygospira, which are particularly important for understanding morphological innovation, biogeographic patterns, and ecological adaptation during a time of major evolutionary expansion. By integrating phylogenetic analysis with biodiversity assessments, our study sheds light on the evolutionary history and e..., , # Original and coded matrix for Zygospirinids; and alternative tree topologies

Dataset DOI: [10.5061/dryad.v9s4mw773](10.5061/dryad.v9s4mw773)

## Description of the data and file structure

Multiple datasets of internal and external characters were incorporated into one single file (Excel file, Supplementary Data 1). Characters were coded in an original dataset with continuous (measured in millimeters) and discrete characters; more information about the character states is found on the \"Metadata\" sheet (Supplementary Data 1). Later, all characters were converted to categorical character states (0-6), missing (?), or absent/gap (-) (NEXUS and NEXUS Metadata sheets, Supplementary Data 1). The created NEXUS file was incorporated into a Bayesian phylogenetic framework under the fossilized birth-death (FBD) in BEAST2. If you wish to access more information on the rates used and statistics involving the model, please contact me at [[e-mail]](mailto:[e-mail]), and I...,