Guadalupian
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The Guadalupian is the second and middle series/epoch of the Permian. The Guadalupian was preceded by the Cisuralian and followed by the Lopingian. It is named after the Guadalupe Mountains of New Mex
Titanophoneus, top of the food chain in the Guadalupian
Roadian
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In the geologic timescale, the Roadian is an age or stage of the Permian. It is the earliest or lower of three subdivisions of the Guadalupian Epoch or Series. The Roadian lasted between 274.4 and 266
Guadalupian
…increased volcano activity brought a reduction in oxygen, a greenhouse and mass extinction. There are three stages in the guadalupian, they are the Roadian, Wordian, and Capitanian. The Roadian Stage was between 272.3 ± 0.5 – 268.8 ± 0.5 Mya…
Hercosestria cribrosa, a reef-forming Roadian brachiopod from the Glass Mountains of Texas