[Phylum] [Arthropoda] Siebold, 1848 - arthropods Chelicerata Heymons, 1901 Euchelicerata Weygoldt & Paulus, 1979 [Order] Scorpiones Koch, 1837 - scorpions Suborder Neoscorpionina Thorell & Lindström, 1885 Infraorder Orthosterni Pocock, 1911 Parvorder Buthida Soleglad & Fet, 2003 Family †Palaeotrilineatidae Lourenço, 2012 [monotypic] Genus †Palaeotrilineatus Lourenço, 2012