A new integrated morpho- and molecular systematic classification of Cenozoic radiolarians (Class Polycystinea) - suprageneric taxonomy and logical nomenclatorial acts Author Suzuki, Noritoshi Author Caulet, Jean-Pierre Author Dumitrica, Paulian text Geodiversitas 2021 2021-07-08 43 15 405 573 journal article 5275 10.5252/geodiversitas2021v43a15 a8353504-9387-42cf-8d81-8ecacbe9bd90 1638-9395 5101757 urn:lsid:zoobank.org:pub:DC259A19-9B35-4B33-AD9F-44F4E1DA9983 Order NASSELLARIA Ehrenberg, 1876 Phylogenetic Molecular Lineage I ( Sandin et al. 2019 ) DIAGNOSIS. — Multi-segmented Nassellaria having a simple cephalis and discrete dividers between the subsequent segments below the thorax. REMARKS Lineage I is the oldest clade in the entire Nassellaria order as the molecular clock indicates that it may date back to the Devonian ( Sandin et al. 2019 ). Although only one genus Eucyrtidium was confirmed as a member of Lineage I, Amphipyndacoidea , Archaeodictyomitroidea and Eucyrtidioidea are likewise considered members of Lineage I. This inclusion is done because the huge number of studies devoted to them over the last century.