Tulaneia amabilia, a new erniettomorph from the Wood Canyon Formation, Nevada and the age of the Ediacaran-Cambrian transition in the Great Basin

Specimens of Tulaneia amabilia n. gen n. sp. [previously Ernietta plateauensis Pflug] discovered by RJH in 1991 at a site in the Montgomery Mountains near Johnnie, Nevada, are described for the first time. All of the material from the original locality was from float, but its stratigraphic position was clearly within the lowest siliciclastic to dolostone interval of the lower member of the Wood Canyon Formation (LMWCF); this was confirmed by subsequent discoveries. As the upper part of the LMWCF contains Treptichnus pedum (Seilacher), the Ediacaran-Cambrian boundary has long been drawn at its first appearance. However, in the Esmeralda Member of the Deep Spring Formation in the White-Inyo Mountains, California and at Mount Dunfee, Nevada, another Cambrian ichnofossil—‘Plagiogmus’ [now Psammichnites gigas arcuatus (Roedel)]—is found just beneath the nadir of the basal Cambrian isotope excursion (BACE). As the nadir of the BACE excursion is older than ~539 Ma in Mexico, the oldest occurre..., , , # Tulaneia amabilia, a new erniettomorph from the Wood Canyon Formation, Nevada and the age of the Ediacaran-Cambrian transition in the Great Basin

[https://doi.org/10.5061/dryad.f1vhhmh4s](https://doi.org/10.5061/dryad.f1vhhmh4s)

## Description of the data and file structure

Tabulated stratigraphic measurements and occurrences of key fossils and other geological criteria in sections through the Ediacaran-Cambrian lower member of the Wood Canyon Formation (LMWCF) in California and Nevada, presented as a Microsoft Excel file saved as a pdf. The columns filled with numbers represent measured stratigraphic sections, labeled and referenced accordingly; the gray-shaded cells refer to specimens that are illustrated in this work or in the literature, as shown in order from left to right, respectively. The stratigraphic heights of the three main dolostones of the LMWCF are highlighted in orange to enable visual correlation of the measured sections; heights in sections are in meters and are t...