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Composita subtilita
Images: 
By DPS Ammonite
Taxonomy
Lamp shell
Kingdom: Animalia
Phylum: Brachiopoda
Class: Rhynchonellata
Order: Athyridida
Family: Athyrididae
Genus: Composita
Species: Composita subtilita
Author Citation (Hall 1852)
Geological Time Scale
Eon: Phanerozoic
Era: Paleozoic
Period: Carboniferous
Sub Period: Pennsylvanian
Epoch: Middle
International Age: Moscovian
Stratigraphy
Naco Formation
Provenance
Collector: Me
Date Collected: 09/08/2020
Acquired by: Field Collection
Dimensions
Width: 15 mm
Thickness: 10 mm
Location
Roberts Mesa fossil locality
Gila County
Arizona
United States
Comments
Composita subtilita is the most common brachiopod in the Pennsylvanian Naco Formation in central Arizona. This silicified one was found while etching out a giant horn coral. The red Beekite chalcedony dots give this one character.
Photo 1 Brachial valve.
Photo 2 Pedical valve.
Photo 3 Closure with sulcus.
Photo 4 Shell with giant silicified horn coral.
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