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Stromatoporoids from the allochthonous reef facies of the Stuart Bay Formation (Lower Devonian), Bathurst Island, arctic Canada

Published online by Cambridge University Press:  14 July 2015

Colin W. Stearn*
Affiliation:
Department of Geological Sciences, McGill University, Montreal, Quebec H3A 2A7, Canada

Abstract

Fourteen taxa of stromatoporoids are described from allochthonous blocks of reefal limestone embedded in siltstones of late Gedinnian to Siegenian age. The fauna is a mixture of genera that characterize Ludlovian–Gedinnian rocks (Actinodictyon, Parallelostroma, Syringostromella) and those that characterize Emsian–Eifelian rocks (Atopostroma, Anostylostroma, Habrostroma, Syringostroma). The following new species are described: Gerronostroma franklinense, Gerronostroma nivale, Actinodictyon venustum, and Syringostromella praecox. The new genus Belemnostroma with type species B. hastatum n. sp. is established for stromatoporoids with the basic structure of Anostylostroma but penetrated by large, rodlike megapillars. Species with long coenosteles are excluded from Stromatopora on the basis that they are not congeneric with the type species and many species assigned to Ferestromatopora should be reassigned to Stromatopora. Previously described species of Atopostroma, Stromatopora, and Parallelostroma are recognized and redescribed.

Type
Research Article
Copyright
Copyright © The Paleontological Society 

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