Hercosestria cribrosa, A reef-forming Roadian brachiopod from the Glass Mountains of Texas.
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 273.01 and 266.9 million years ago (Ma). It was preceded by the Kungurian and followed by the Wordian.[3]
^"Chart/Time Scale". www.stratigraphy.org. International Commission on Stratigraphy.
^ ab"GSSP for Roadian Stage". International Commission on Stratigraphy. Retrieved 13 December 2020.
^Gradstein, F.M.; Ogg, J.G. & Smith, A.G.; 2004: A Geologic Time Scale 2004, Cambridge University Press
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...
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. Olson's...
late Lower Permian (Kungurian) and possibly the early Middle Permian (Roadian) in what is now Texas and Oklahoma in the United States. The large number...
and colleagues in 1992 proposed a tripartite scheme, advocating that the Roadian-Capitanian was distinct from the rest of the Late Permian, and should be...
years ago (Ma). It was preceded by the Artinskian and followed by the Roadian. The Kungurian is named after the Russian city of Kungur in Perm Krai....
the last known caseids come from the strata of the middle Permian (Upper Roadian-Wordian) of France and European Russia, where they cohabited notably with...
PreꞒ Ꞓ O S D C P T J K Pg N Productid brachiopod ventral valve interior; Roadian, Guadalupian (Middle Permian); Glass Mountains, Texas. Scientific classification...
doi:10.18814/epiiugs/1998/v21i1/003. Retrieved 7 December 2020. "GSSP for Roadian Stage". International Commission on Stratigraphy. Retrieved 13 December...
zone of Afganella schenki Olson’s Extinction, in the early Guadalupian (Roadian, Wordian), led to an extended period of low diversity when worldwide two-thirds...
or earliest Permian (Asselian) to the early Guadalupian epoch (latest Roadian stage) of North America, China, Germany, Russia and France. The bolosaurids...
The Permian–Triassic deposits of Nurra preserve the oldest (Permian: Roadian) fluvial burrows ascribed to ghost shrimps (Decapoda: Axiidea, Gebiidea)...
Dimetrodon angelensis, is from the latest Kungurian or, more likely, early Roadian San Angelo Formation. However, given the notorious incompleteness of the...
descendants, the mammals. The group became extinct by the Kungurian or the Roadian, replaced by anomodonts, theriodonts, and the diapsid reptiles. The lifestyle...
extinct genus of caseid synapsid that lived during the early Middle Permian (Roadian) in what is now Sardinia. It is represented by a single species, the type...
to 270 million years ago at the beginning of the Middle Permian (Lower Roadian) in what is now the Gansu Province in northern China. It is known by a...
Nestell, Galina P. (2021). "Fish Microremains from the Cutoff Formation (Roadian, Middle Permian) of the Guadalupe Mountains, West Texas, USA". Micropaleontology...
Cooper & Grant 1969 (Roadian, Guadalupian, Middle Permian); Glass Mountains, Texas. Hercosestria cribrosa Cooper & Grant 1969 (Roadian, Guadalupian, Middle...
is assumed that they must have evolved during the earlier part of the Roadian, or possibly even the Kungurian epoch, but no trace has been found. These...
Dimetrodon Temporal range: Cisuralian to Guadalupian (Asselian to Roadian), 295–270 Ma PreꞒ Ꞓ O S D C P T J K Pg N Skeleton of D. limbatus, Staatliches...
period from the Artinskian stage of the Cisuralian (Early Permian) to the Roadian stage of the Guadalupian (Middle Permian). The closest living relatives...
geologic formation in Oklahoma. It preserves fossils dating back to the Roadian stage of the Middle Permian. These include, among others, the dissorophoid...
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