Taxonomy, Evolution, and Biostratigraphy of Conodonts from the Kechika Formation, Skoki Formation, and Road River Group (Upper Cambrian to Lower Silurian), Northeastern British Columbia

Abstract

Stratigraphy, conodont taxonomy and biostratigraphy of Upper. Cassiar Terrane, northern British Columbia1. Conodonts from the upper Kechika Formation and base of the Road River Group are Early Ordovician (Tremadocian) in age, and tablished by conodont biostratigraphy provide for correlation to coeval facies of Cambrian to Lower Silurian platform to basin facies of the. Taxonomy, Evolution, and Biostratigraphy of Conodonts from the. mation at the Carcel Puncco section (Inambari River), Eastern Cordillera of. Formation in other places of the Altiplano and the Eastern Cordillera of Peru.. be within the upper part of the Floian Stage of the Lower. The taxonomy of conodonts follows the most recent Lower Silurian), Northeastern British Columbia. †Kallidontus Pyle & Barnes 2002 Conodont elements represent the teeth, which formed a feeding apparatus, of an. of Lower Paleozoic strata of remote northeastern British Columbia. the upper Kechika and Skoki, the Road River Group (Lower Ordovician to Lower Silurian). Cambrian to early Silurian age has resulted in the establishment of a refined Biogeographic and biostratigraphic implications of the-Australian. Cordylodontidae is a family of conodonts.

A proposed Global Boundary Stratotype Section and Point for the base of the Middle Ordovician Series: The Niquivil section, Precordillera of San Juan, Argentina

“…In Northeastern British Columbia, C. aranda ranges throughout the Jumudontus gananda and T. laevis zones or correlative intervals of the upper O. evae and Paroistodus originalis zones, in the matched Atlantic -Mid-continent biozonation scheme proposed by Pyle and Barnes (2002). The co-occurrence of C. aranda and J. gananda in the lowermost strata of the Sunblood Formation suggest correlation with the critical Lower/Middle Ordovician boundary interval.…”

New conodont species and biostratigraphy of the Santa Rosita Formation (upper Furongian–Tremadocian) in the Tilcara Range, Cordillera Oriental of Jujuy, Argentina

“…is distinguished from the forms originally described by Pyle and Barnes (K. serratus, K. nodosus and K. princeps) by a poor ornamentation of crests and nodes, small size and simple design. This species is a possible ancestor of K. princeps Pyle and Barnes, 2002 given that this taxon is recorded in younger successions of the Parcha area, in the Cordillera Oriental (Albanesi et al, 2007a. The P element of K. gondwanicus differs from the P element of K. princeps by being longer and symmetrical.…”

“…Zeballo et al, 2005b) can not be referred to Utahconus as it develops a more complex apparatus, which is septimembrate with triangulariform elements; therefore, it is reassigned to a new genus (see discussion of Tilcarodus n. gen.). Therefore, the diagnosis is accepted as emended by Pyle and Barnes (2002), where the apparatus design is simple, tri-to quadrimembrate and species would fit properly as described below, along with the type species U. utahensis (Miller, 1969). In turn, Landing et al (1996), Landing et al (2003), and Tolmacheva and Abaimova (2009) synonymized Utahconus with Scalpellodus Dzik, using the first genus mentioned by nomenclatural priority.…”

Middle ordovician conodonts from the Chingiz Ridge (Kazakhstan): taxonomy of the Naiman Formation assemblage and its biogeographic affinity

“…признаками элементов Drepanoistodus latus Pyle et Barnes (табл. I,, описанного из флоского яруса Канады (Pyle, Barnes, 2002 (Ethington, Clark, 1982;Lehnert, 1995;Bauer, 2010). H. kristinae является видом широкого географического распростране ния и обнаружен практически повсеместно за ис ключением платформенной части центральной Америки (Stouge, 1984;Du et al, 2005;Bauer, 2010;Zhen et al, 2011;Mestre, Heredia, 2013).…”

“…A. longus в типовом регионе (Западный Ньюфаундленд) встречается от верхов тремадок ского до нижней части флоского яруса (Stouge, Bagnoli, 1988). Наиболее молодые A. longus из вестны из пограничных отложений верхнеф лоского-нижнедапинского подьярусов в Бри танской Колумбии (СевероЗападная Канада) (Pyle, Barnes, 2002 A. delicatulus распространен в Северной Америке и Австралии в верхней части дарри вильского яруса и нижней части сандбийского яруса (зона Pygodus serra-нижняя часть зоны Amorphognathus tvaerensis) (Bergström et al, 1974;Zhen et al, 2001). Самые древние Appalachignathus sp.…”