Two new Silurian species of Eurypterus (Chelicerata: Eurypterida) from Norway and Canada and the phylogeny of the genus

摘要: Synopsis A new species of Eurypterus from the Wenlock Ringerike, Norway is described as E. hankeni sp. nov., based on fine pustular ornament carapace and opisthosoma, an enlarged distal podomere swimming leg long angular epimera pretelson. are reviewed: oldest species, minor Laurie, 1898 Llandovery Pentland Hills in Scotland redescribed diagnosed having eyes with large palpebral lobes, posterior second order opisthosomal differentiation, a coarse both tergites lacking rows raised scales found other representatives genus. Material previously left open nomenclature Late Ludlow Somerset Island, Canada, here named leopoldi nov. It relatively similar to pittsfordensis, but differs rhombiovate outline metastoma. An overview morphological features carrying phylogenetic information provided. phylogene...