caa a22 4500 388017082 CHVBK 20180307124914.0 cr unu---uuuuu 161130e199809 xx s 000 0 eng 10.1017/S0022336000027207 doi S0022336000027207 pii (NATIONALLICENCE)cambridge-10.1017/S0022336000027207 Early Middle Cambrian Albertella Biozone trilobites of the Pioche Shale, southeastern Nevada [Elektronische Daten] [Julie D. Eddy, Linda B. McCollum] Thirty-four species of trilobites belonging to 21 genera are recognized in the Albertella Biozone within the Grassy Spring Member (new name) of the Pioche Shale of southeastern Nevada. Genera include Pagetia, Poliella, Kootenia, Olenoides, Albertella, Albertellina, Albertelloides, Delamarella, Mexicaspis, Paralbertella, Ptarmiganoides, Ursinella, Zacanthoides?, Amecephalites, Mexicella, Nyella, Onchocephalites?, Pachyaspis, Panacus, Plagiura, and Volocephalina. Two new corynexochid genera and species, Delamarella brevispinaspis and Ursinella major, are described. The existing corynexochid genus Albertella is revised to include two new species, A. fritzi and A. highlandensis. A new species, Albertelloides kitai, is described. Two new ptychopariid genera, Amecephalites and Panacus, plus four new ptychopariid species, Amecephalites sundbergi, Mexicella granulata, Panacus palmeri, and Volocephalina variosa, are described and Nyella immoderata Palmer is revised. In addition, the Albertella Biozone is divided into three new subbiozones, the lower Albertellina aspinosa Subbiozone, the middle unnamed subbiozone, and the Albertella highlandensis Subbiozone. Copyright © The Paleontological Society Eddy Julie D. Department of Geology, Eastern Washington University, Cheney 99004 aut McCollum Linda B. Department of Geology, Eastern Washington University, Cheney 99004 aut Journal of Paleontology Cambridge University Press 72/5(1998-09), 864-887 0022-3360 72:5<864 1998 72 JPA https://doi.org/10.1017/S0022336000027207 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1017/S0022336000027207 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Eddy Julie D. Department of Geology, Eastern Washington University, Cheney 99004 aut NATIONALLICENCE 700 1- McCollum Linda B. Department of Geology, Eastern Washington University, Cheney 99004 aut NATIONALLICENCE 773 0- Journal of Paleontology Cambridge University Press 72/5(1998-09), 864-887 0022-3360 72:5<864 1998 72 JPA CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge