Sidor, C. A. 2001 Simplification as a trend in synapsid cranial evolution Evolution 55 1419-1442 Oedaleops_campi Eothyris_parkeyi Casea_broilii Casea_rutena Cotylorhynchus_romeri Ennatosaurus_tecton Mycterosaurus_longiceps Mesenosaurus_romeri Elliotsmithia_longiceps Aerosaurus_wellesi Varanops_brevirostris Varanodon_agilis Varanosaurus_acutirostris Ophiacodon_spp Archaeothyris_florensis Ianthasaurus_hardestii Edaphosaurus_spp Haptodus_garnettenis Sphenacodon_spp Secodontosaurus_obtusidens Dimetrodon_spp Tetraceratops_insignis Biarmosuchus_tener Hipposaurus_spp Ictidorhinus_martinsi Lycaenodon_longiceps Rubidgina_angusticeps Anteosaurus_magnificus Titanophoneus_potens Australosyodon_nyaphuli Syodon_efremovi Styracocephalus_platyrhynchus Estemmenosuchus_spp Jonkeria_ingens Tapinocaninus_pamelae Struthiocephalus_spp Ulemosaurus_svijagensis Moschops_capensis Patronomodon_nyaphulii Ostheria_netzvetajevi Ulemica_invisa Suminia_getmanovi Galeops_whaitsi Eodicynodon_oosthuizeni Pristerodon_spp Endothiodon_uniseries Diictodon_spp Robertia_broomiana Myosaurus_gracilis Emydops_sp Cistecephalus_microrhinus Cistecephaloides_boonstrai Kingoria_nowacki Oudenodon_baini Pelanomodon_sp Aulacephalodon_baini Dicynodon_spp Lystrosaurus_murrayi Kannemeyeria_simocephalus Tetragonias_njalilus Placerias_gigas Stahleckeria_potens Aelurosaurus_felinus Arctognathus_spp Cephalicustriodus_kingoriensis Cyonosaurus_spp Leontocephalus_spp Scylacops_spp Arctops_watsoni Lycaenops_spp Prorubidgea_alticeps Dinogorgon_spp Rubidgea_spp Aloposaurus_spp Gorgonops_spp Hofmeyria_atavus Moschorhinus_kitchingi Euchambersia_mirabilis Olivieria_parringtoni Theriognathus_sp Moschowhaitsia_vjuschkovi Ictidosuchoides_spp Viatkosuchus_sumini Regisaurus_jacobi Ericiolacerta_parva Bauria_cynops Watsoniella_breviceps Microgomphodon_oligocynus Lycosuchus_vandereti Glanosuchus_macrops Chthonosaurus_velocidens Ptomalestes_avidus Dvinia_prima Procynosuchus_delaharpeae Cynosaurus_suppostus Galesaurid_n_sp Galesaurus_planiceps Platycraniellus_elegans Thrinaxodon_liorhinus Bolotridon_frerensis Cynognathus_sp Diademodon_mastacus Trirachodon_spp Luangwa_drysdalli Massetognathus_pascuali Exaeretodon_frenguelli Gomphodontosuchus_brasiliensis Tritylodon_longaevus Oligokyphus_spp Bienotherium_elegans Kayentatherium_wellesi Bocatherium_mexicanum Bienotheroides_wanhsienensis BP_slash_1_slash_2669 Ecteninion_lunesis Probelesodon_lewisi Probelesodon_sanjuanensis Aleodon_brachyrhamphus Belesodon_magnificus Probainognathus_jenseni Pachygenelus_monus Sinoconodon_sp Morganucodon_oehleri Ornithorhynchus_anatinus Didelphis_virginiana Homo_sapiens Osteology Maximum Parsimony Based on reanalysis of the original matrix. Sidor_2001a