Lower ordovician tremadocian conodonts from broom point and green point western newfoundland canada

Bagnoli, G.; Barnes, C.R.; Stevens, R.K.

Bollettino della Societa Paleontologica Italiana 25(2): 145-158

1986


ISSN/ISBN: 0375-7633
Accession: 005835272

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Abstract
Lower Ordovician conodonts are reported from continental slope deposits of the Cow Head group from sections at broom Point North and Green Point, western Newfoundland. The conodont fauna is dominated by species of the genus Cordylodus Pander. The apparatus of Cordylodus, as interpreted here, consists of two morphotypes (a variable transition series of p elements and a q element) in a Type III B apparatus. One new genus, DIAPHANODUS [type species, Coelocerodontus latus], and three new species, Cordylodus caboti, C. deflexus and C. primitivus are described. New evolutionary relationships are suggested between different species of Cordylodus. An evolutionary sequence of Eoconodontus notchpeakensis through Cordylodus primitivus, C. proavus, C. caboti, C. intermedius, to C. angulatus is proposed.