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Cambrian life in Texas included brachiopods, gastropods, graptolites, and trilobites. [5] Areas of Texas distant from the shore were home to bivalves, brachiopods, sponges, and trilobites. [4] Contemporary graptolites were preserved in the central region of the state. [6]
Graptolites are a group of colonial animals, members of the subclass Graptolithina within the class Pterobranchia. These filter-feeding organisms are known chiefly from fossils found from the Middle Cambrian ( Miaolingian , Wuliuan ) through the Lower Carboniferous ( Mississippian ). [ 3 ]
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 ...
Graptolithina−Graptolites — a class of prehistoric Paleozoic invertebrates; Subcategories. This category has the following 5 subcategories, out of 5 total. ...
Doubts have been expressed about the identification of the index taxon, but it occurs below the Rhabdinopora and related graptolites. [13] The GSSP of the Floian , the second and last stage of the Lower Ordovician, is established in the Diabasbrottet Quarry , Sweden , ( 58°21′32″N 12°30′09″E / 58.3589°N 12.5024°E / 58. ...
Tetragraptus approximatus is a species of dichograptid graptolite belonging to the genus Tetragraptus. It existed during the Floian Age (477.7 million years ago) of the Ordovician. It is an important index fossil in biostratigraphy.
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.
This article contains a list of fossil-bearing stratigraphic units in the state of Texas, U.S. Sites. Group or Formation Period Notes Admiral Formation: Permian: