附註:"A publication of the National Research Council of Canada Monograph Publishing Program."
"NRC No. 46842"--Title page verso
"Issued by the National Research Council of Canada."--Title page verso
Includes bibliographical references (pages 39-42).
Introduction -- Stratigraphy -- Non-graptolite faunas -- Biostratigraphy -- Biozonal correlation, species diversity, and biogeography -- Evolutionary developments in Ludlow and Pridoli graptolites -- Systematic paleontology -- Order Dendroidea Nicholson, 1872. Genus Dictyonema Hall, 1851 -- Dictyonema sp. -- Genus Acanthograptus Spencer, 1878 -- Acanthograptus? sp. -- Genus Thallograptus Ruedemann, 1925 -- Thallograptus? sp. 1 -- Thallograptus? sp. 2 -- Thallograptus? sp. 3 -- Thallograptus sp. 4 -- Genus Dendrograptus Hall, 1858 -- Dendrograptus sp. -- Dendroid indet. -- Order Tuboidea Kozlowski, 1938. Genus Epigraptus Eisenack, 1941 -- Epigraptus? sp. -- Order Graptoloidea Lapworth, 1873. Suborder Virgellina Fortey and Cooper, 1986 -- Superfamily Diplograptoidea Lapworth, 1873 (sensu Mitchell, 1987) -- References -- Appendix 1: Distribution of species of flattened graptolites in each section -- Appendix 2: Distribution of isolated, three-dimensionally preserved graptolites in each section.
摘要:Graptolites flourished from earliest Ordovician to Early Devonian, a time range of about 90 million years, and were widely distributed as marine benthic and planktonic colonial organisms around then-world. , The present study examines the isolated, uncompressed as well as flattened forms from the Ludlow and Pridoli (Upper Silurian) graptolites of the Arctic, recognizing 46 species of monograptids and retiolitids of which seven are described as new species or subspecies.
