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Berdan, J.M. & Copeland, M.J. (1973). Ostracodes from Lower Devonian formations in Alaska and Yukon Territory. Geological Survey Professional Paper. 825:1-47.
173484
10.3133/pp825 [view]
Berdan, J.M. & Copeland, M.J.
1973
Ostracodes from Lower Devonian formations in Alaska and Yukon Territory
Geological Survey Professional Paper
825:1-47
Publication
Available for editors
Residues of samples, dissolved in acetic and formis(sic) acid from the limestone and shale member of the McCann Hill Chert of eastern Alaska and the Michelle and Prongs Creek Formations of Yukon Territory have revealed the presence of a varied, silicified ostracode fauna. This fauna may serve as a basis for correlating strata from the Alaska-Yukon international boundary near lat 65° N. northeastward for more than 200 miles. Of the more than 40 genera present, hollinaceans and beyrichiaceans are the most distinctive. The hollinaceans find their closest affinity with genera from lower Middle Devonian (Eifelian) beds from the midcontinent region of North America, and the beyrichiaceans with genera from Lower Devonian and Silurian strata of Appalachian North America and of Europe. Conodonts and dacryoconarid tentaculites indicate that the age of the collections from which the ostracodes were obtained is late Early Devonian (Emsian), but the ostracode assemblage reported here does not resemble any described Emsian fauna. These ostracodes are considered to represent a provincial assemblage with some Silurian survivors and some precursors of Middle Devonian forms which subsequently migrated to Eurasia and central North America. In all, 73 taxa, including 6 new genera and 33 new species, are described and illustrated.
America, North
Systematics, Taxonomy
Date action by
Abortivelum Berdan & Copeland, 1973 † (original description)
Abortivelum truncatum Berdan & Copeland, 1973 † (original description) Adelphobolbina prongsensis Berdan & Copeland, 1973 † (original description) Alaskabolbina Berdan & Copeland, 1973 † (original description) Alaskabolbina unilineata Berdan & Copeland, 1973 † (original description) Bairdia dejecta Berdan & Copeland, 1973 † (original description) Bairdiohealdites scapulatus Berdan & Copeland, 1973 † (original description) Bairdiolites sohni Berdan & Copeland, 1973 † (original description) Chironiptrum reticulare Berdan & Copeland, 1973 † (original description) Eukloedenella recta Berdan & Copeland, 1973 † (original description) Eukloedenella soloensis Berdan & Copeland, 1973 † (original description) Hanaites spinosus Berdan & Copeland, 1973 † (original description) Hollinella paucituberculata Berdan & Copeland, 1973 † (original description) Infractivelum Berdan & Copeland, 1973 † (original description) Infractivelum spiculosum Berdan & Copeland, 1973 † (original description) Ogilvites Berdan & Copeland, 1973 † (original description) Shidelerites yukonensis Berdan & Copeland, 1973 † (original description) Subarctichites Berdan & Copeland, 1973 † (original description) Subarctichites serratulus Berdan & Copeland, 1973 † (original description) Yukonibeyrichia Berdan & Copeland, 1973 † (original description) Yukonibeyrichia solo Berdan & Copeland, 1973 † (original description) Yukonibeyrichia yukonensis Berdan & Copeland, 1973 † (original description) |