Middle Devonian Brachiopods from Arctic Canada and Some Preliminary Results of North American Biogeography Based on Quantitative Assessment
INTRODUCTION The upper Lower to Middle Devonian Bird Fiord Formation (late Emsian to late Eifelian) is a carbonate-siliciclastic succession that contains a diverse brachiopod-dominated fauna. A collection of over 45 000 brachiopod specimens, which came from 140 collections made at 34 locations throughout the outcrop belt of this formation, contains 22 species of brachiopods that belong to 21 genera. Among them, the atrypids form 52％ of the biota, spiriferids ～13％, orthids ～8％, productids ～3％, rhynchonellids ～2％, terebratulids ～1％ and the strophomenids, pentamerids, and athyridids each <1％. Spinatrypina, Schizophoria, Elythyna, Desqumatia (Independentrypa), Cupularostrum, and Atrypa collectively form more than 80％ of the brachiopod biota.
Rong-Yu Li
Department of Geology, Brandon University, Brandon, R7A 6A9, Manitoba, Canada
国际会议
The International Conference of Geobiology(地球生物学国际研讨会)
武汉
英文
36-39
2010-06-03（万方平台首次上网日期，不代表论文的发表时间）