Zverkov, N. G. Jacobs, M. L. in press Revision of <em>Nannopterygius</em> (Ichthyosauria: Ophthalmosauridae): reappraisal of the 'inaccessible' holotype resolves a taxonomic tangle and reveals an obscure ophthalmosaurid lineage with a wide distribution Zoological Journal of the Linnean Society Temnodontosaurus_spp Ichthyosaurus_sp Hauffiopteryx_typicus Stenopterygius_quadriscissus Chacaicosaurus_cayi Stenopterygius_aaleniensis Ophthalmosaurus_icenicus Ophthalmosaurus_natans Mollesaurus_periallus Acamptonectes_densus Leninia_stellans Arthropterygius_chrisorum Arthropterygius_lundi Arthropterygius_hoybergeti Arthropterygius_volgensis Arthropterygius_thalassonotus Brachypterygius_extremus Grendelius_zhuravlevi Grendelius_pseudoscythicus Grendelius_alekseevi Grendelius_mordax Caypullisaurus_bonapartei Aegirosaurus_leptospondylus Undorosaurus_gorodischensis Undorosaurus_nessovi Undorosaurus_kielanae Nannopterygius_enthekiodon Nannopterygius_saveljeviensis Nannopterygius_yasykovi Nannopterygius_borealis Gengasaurus_nicosiai Sveltonectes_insolitus Plutoniosaurus_bedengensis Maiaspondylus_lindoei Platypterygius_australis Platypterygius_hercynicus Platypterygius_americanus Sisteronia_seeleyi Platypterygius_platydactylus Athabascasaurus_bitumineus Simbirskiasaurus_birjukovi Muiscasaurus_catheti Platypterygius_sachicarum Acuetzpalin_carranzai Osteology Maximum Parsimony Based on reanalysis of the original matrix. Zverkov_et_Jacobs_inpressa