Astartella concentrica

UNB-2018-0717Fossils » Eukaryote » Animalia » Mollusca » Bivalvia

Description

Kingdom: Animalia Phylum: Mollusca Class: Bivalvia Subclass: Autobranchia Order: Carditida Family: Astartidae Genus: Astartella (Hall, 1858) Species: Astartella concentrica (Conrad, 1842) Four specimens with both the right and left valves preserved. Prominent growth lines are visible. Rounded, triangular umbo that is fairly centred. Lunule and hinge ligament are visible on each specimen. Rounded ventral margin and rounded/triangular dorsal margin.

Specifications

Object name	Astartella concentrica
ID	UNB-2018-0717
Legal status	Permanent collection
Category	Fossil
Classification	Domain: Eukaryote Kingdom: Animalia Phylum: Mollusca Class: Bivalvia
Composition	Calcium carbonate
Age	Eon: Phanerozoic Era: Paleozoic Period: Carboniferous Subperiod: Pennsylvanian Epoch: Upper Pennsylvanian Age: Virgilian
Numeric age	303 Mya
Origin	Gunsight, Texas, U.S.A.
Pieces	4
Partial	No
Measurements	1.8cm x 1.5cm x 1cm 1.8cm x 1.5cm x 0.9cm 1.9cm x 1.6cm x 0.9cm 1.9cm x 1.2cm x 0.8cm

Map of Origin

Publications

T. A. Conrad. 1842. Observations on the Silurian and Devonian systems of the United States, with descriptions of new organic remains. Journal of the Academy of Natural Sciences of Philadelphia 8(2):228-280
J. Hall. 1858. Palaeontology of Iowa. Report of the Geological Survey of the state of Iowa 1(2):473-724