The Arco Hills Formation contains abundant lingulate, strophomenate, and rhynchonellate brachiopods, echinoderms, corals, bryozoans, and rare vertebrate and trilobite fossil fragments. Fossils are equally abundant in carbonate and siliciclastic units; however, silicified brachiopods are limited to carbonate lithologies which occasionally have minor amounts of siliciclastic sediment. These silicified brachiopods were extracted for taxonomic, taphonomic, and paleoecologic description. Chesterian brachiopod assemblages of the Cordilleran region are poorly described and this work represents the only systematic treatment of Chesterian macrofossil assemblages in Idaho. Fifteen genera (23 species) of brachiopods are presented from Arco Hills Formation, including two new species: Anthracospirifer arcoensis and Composita idahoensis, described herein.
You have requested a machine translation of selected content from our databases. This functionality is provided solely for your convenience and is in no way intended to replace human translation. Neither BioOne nor the owners and publishers of the content make, and they explicitly disclaim, any express or implied representations or warranties of any kind, including, without limitation, representations and warranties as to the functionality of the translation feature or the accuracy or completeness of the translations.
Translations are not retained in our system. Your use of this feature and the translations is subject to all use restrictions contained in the Terms and Conditions of Use of the BioOne website.