Image: Spirifer perlamosus pedunculate valve
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Description: A Spirifer perlamosus lampshell, Order Spiriferida, family Spiriferidae, 19mm along the axis, pedunculate valve, collected at Rock Crossing on Hickory Creek, Criner Mountains, about 7 miles South of Ardmore, Oklahoma, USA, in the year 1965, from the early Upper Ordovician (Sandbian) (Pooleville Member, Bromide Formation, Simpson Group, Black River Series)
Title: Spirifer perlamosus pedunculate valve
Credit: Own work
Author: Dwergenpaartje
Usage Terms: Creative Commons Attribution-Share Alike 3.0
License: CC BY-SA 3.0
License Link: https://creativecommons.org/licenses/by-sa/3.0
Attribution Required?: Yes
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