Choia is a genus of extinct demosponge ranging from the Cambrian until the Lower Ordovician periods. Fossils of Choia have been found in the Burgess Shale in British Columbia; the Maotianshan shales of China; the Wheeler Shale in Utah; the Itajaí Basin in Brazil; and the Lower Ordovician Fezouata formation. [2][3] It was first described in ...

Choia carteri consists of a flattened elliptical disc, up to 2 cm in diameter (5 cm including the long spicules), formed by fine radiating spicules from which stronger and long spicules up to 30 mm in length radiate. Other species differ in size and spine coarseness.

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Choia is a genus of extinct demosponge ranging from the Cambrian until the Lower Ordovician periods. Fossils of Choia have been found in the Burgess Shale in British Columbia; the Maotianshan shales of China; the Wheeler Shale in Utah; and …

Aug 18, 2011 · Choia is an extinct sponge that lived from the Cambrian to the early Ordovician. Choia was about one inch in diameter and it looked like a cone flattened from the top, with spines radiating out the sides.

Choia is a genus of extinct demosponge ranging from the Cambrian until the Lower Ordovician periods. Fossils of Choia have been found in the Burgess Shale in British Columbia; the Maotianshan shales of China; the Wheeler Shale in Utah; and …

Middle Cambrian sponges from the Drum Mountains and House Range in western Utah. Journal of Paleontology 84 (1):66-78.

Choia, though rare, looked very much like a modern day sea urchin. The needle-like spicules projecting from its body were used to stabilize itself on the sea-floor. The colonial Choia fed by utilizing feeding cells to extract nutrients from the water. Vauxia, a branching sponge, was the most abundant species that Charles Walcott collected.

Choia es un género de demosponja extinta que abarca desde el Cámbrico hasta el Ordovícico Inferior. Se han encontrado fósiles de Choia en el esquisto de Burgess, en la Columbia Británica; en el esquisto de Maotianshan, en China; en el esquisto de Wheeler, en Utah; y en la formación Fezouata, del Ordovícico inferior. [1]

Choia is a rarer genus of sponge (Phylum Profera) with radiating spines, and is also found in the Burgess Shale. This plate was found in the Wheeler Shale’s so-called 'red beds', as the plate’s color attests.