Taxonomy, evolution, and biostratigraphy of conodonts from the Kechika Formation, Skoki Formation, and Road River Group (Upper Cambrian to Lower Silurian), Northeastern British Columbia
附註:"Issued by the National Research Council of Canada."--Title page verso.
"NRC No. 44461"--Title page verso.
Includes bibliographical references (pages 119-126).
Abstract/Résumé -- Acknowledgements -- Introduction. Location and regional geology -- Materials and methods -- Previous biostratigraphic studies -- Lithostratigraphy. Kechika Formation -- Skoki Formation -- Road River Group -- Biostratigraphy. Conodont biostratigraphy and provinciality -- Preservation of conodont fauna -- Conodont zonation -- Cosmopolitan zones. Eoconodontus Zone -- Cordylodus proavus Zone -- Iapetognathus Zone -- Midcontinent realm zones. Polycostatus falsioneotensis Zone, new -- Rossodus tenuis Zone, new -- Rossodus manitouensis Zone -- Low Diversity Interval -- Scolopodus subrex Zone, new -- Acodus kechikaensis Zone, new -- Oepikodus communis Zone -- Jumudontus gananda Zone, new -- Tripodus laevis Zone -- Atlantic realm zones. Cordylodus angulatus Zone -- Paltodus deltifer Zone -- Drepanoistodus nowlani Zone, new -- Acodus deltatus Zone, emended -- Paroistodus proteus Zone -- Paracordylodus gracilis Zone -- Prioniodus elegans Zone -- Oepikodus evae Zone -- Paroistodus originalis Zone -- Paroistodus horridus Zone, new -- Dzikodus tablepointensis Zone, emended -- Distomodus staurognathoides Zone -- Comparison with standard zonations -- Comparison with zonation across the Cambro-Ordovician boundary -- Comparison with standard Midcontinent Realm zonation -- Comparison with standard Atlantic Realm zonation -- Discussion of key evolutionary lineages -- Systematic paleontology. Introduction -- Order PROCONODONTIDA Sweet -- Family CORDYLODONTIDAE Lindström -- Family FRYXELLODONTIDAE Miller -- Family PROCONODONTIDAE Lindström -- Order BELODELLIDA Sweet -- Family ANSELLIDAE Fåhræus and Hunter -- Family BELODELLIDAE Khodalevich and Tschernich -- Order PROTOPANDERODONTIDA Sweet -- Family ACANTHODONTIDAE Lindström -- Family CLAVOHAMULIDAE Lindström -- Family CORNUODONTIDAE Stouge -- Family DREPANOISTODONTIDAE Fåhræus and Nowlan -- Family ONEOTODONTIDAE Miller -- Family PROTOPANDERODONTIDAE Lindström -- Order PANDERODONTIDA Sweet -- Fami
摘要:Conodonts, the tiny, phosphatic, tooth-like remains of an extinct group of early vertebrates, are the most important fossil group for biostratigraphy throughout their stratigraphic range from Late Cambrian to Late Triassic. This monograph represents a benchmark study of these important zonal fossils. The detailed paleontological work not only provides a taxonomic basis for future studies on early Paleozoic conodonts but also focuses on the evolution of conodonts in the early Ordovician, a time of extraordinary adaptive radiation. The taxonomic work provides detailed descriptions and illustrations of 185 species representing 69 genera. Seven new genera and 39 new species are described. The high diversity of taxa across the platform-to-basin transect shows the biogeographic differentiation and spatial ecological partitioning of conodonts through time. The taxonomy permits the refinement to the biostratigraphic zonation within two faunal realms for British Columbia that can be correlated with schemes elsewhere in North America and also internationally.
