Composita grandis

UNB-2018-0066Fossils » Eukaryote » Animalia » Brachiopoda » Rhynchonellata

Description

Kingdom: Animalia Phylum: Brachiopoda Class: Rhynchonellata Order: Athyridida Family: Athyrididae Genus: Composita (Brown, 1849) Species: Composita grandis (Cooper, 1953) Seven specimens with both the brachial and pedicle valves preserved, varying sizes. Brachial valve is notably smaller compared to the pedicle valve. The largest specimen is the best preserved with defined growth lines visible on the valves. Prominent sulcus and faint fold. Oval anterior margin and rounded/triangular posterior margin. Small beak.

Specifications

Object name	Composita grandis
ID	UNB-2018-0066
Legal status	Permanent collection
Category	Fossil
Classification	Domain: Eukaryote Kingdom: Animalia Phylum: Brachiopoda Class: Rhynchonellata
Composition	Calcium carbonate
Age	Eon: Phanerozoic Era: Paleozoic Period: Permian Subperiod: Lower Permian
Numeric age	263 Mya
Origin	Grand Summit, Kansas, U.S.A.
Pieces	7
Partial	No
Measurements	3.5cm x 3cm x 2.2cm 3cm x 2.2cm x 1.5cm 3.2cm x 2.5cm x 1.5cm 2.3cm x 1.8cm x 1.1cm 1.9cm x 1.5cm x 1.5cm 2.2cm x 1.6cm x 1cm 1.9cm x 1.4cm x 1cm

Map of Origin

Publications

G. A. Cooper. 1953. Sponges, Brachiopoda, Pelecypoda, and Scaphopoda. Permian fauna at El Antimonio, western Sonora, Mexico. Smithsonian Miscellaneous Collections 119(2):21-80