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The name graptolite comes from the Greek graptos meaning "written", and lithos meaning "rock", as many graptolite fossils resemble hieroglyphs written on the rock. Linnaeus originally regarded them as ' pictures resembling fossils ' rather than true fossils, though later workers supposed them to be related to the hydrozoans ; now they are ...
This list of graptolites is an attempt to create a comprehensive listing of all genera from the fossil record that have ever been considered to be members of ...
This page was last edited on 23 November 2023, at 11:55 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.
Monograptidae is an extinct family of graptolites of the order Graptoloidea. [1] Monograptids have only one row of thecae per stipe (stem, branch), unlike the biserial graptolites which have two opposing rows of thecae per stipe.
The lower boundary of the Darriwilian is defined as the first appearance of the graptolite species Undulograptus austrodentatus around 469.4 million years ago. It lasted for about 10.8 million years until the beginning of the Sandbian around 458.2 million years ago. [ 7 ]
This page was last edited on 18 November 2024, at 07:02 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.
Monograptus is a genus of graptolites in the order Graptoloidea. This particular genus is the last stage of the graptoloid evolution before its extinction in the early Devonian . A characteristic of the genus includes one uniserial stipes with very elaborate thecae .
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