# Graphical timeline of plesiosaurs
## Taxa

| Taxon | First Appearance Datum | Last Appearance Datum | Previous Estimates | Image |
| Abyssosaurus nataliae | Late Hauterivian | Late Hauterivian | Late Hauterivian | |
| Albertonectes vanderveldei | Late Campanian | Late Campanian | Late Campanian | Life restoration of Albertonectes vanderveldei |
| Alexandronectes zealandiensis | Early Maastrichtian | Early Maastrichtian | Early Maastrichtian | |
| Alexeyisaurus karnoushenkoi | Early-Middle Norian | Early-Middle Norian | Early-Middle Norian | |
| Aphrosaurus furlongi | Maastrichtian | Maastrichtian | Maastrichtian | |
| Aristonectes parvidens | Maastrichtian | Maastrichtian | Maastrichtian | Life restoration of Aristonectes parvidens |
| Aristonectes quiriquinensis | Late Maastrichtian | Late Maastrichtian | Late Maastrichtian | Life restoration of Aristonectes quiriquinensis |
| Attenborosaurus conybeari | Sinemurian | Sinemurian | Sinemurian | Life restoration of Attenborosaurus conybeari |
| Cardiocorax mukulu | Early Maastrichtian | Early Maastrichtian | Early Maastrichtian | |
| Dolichorhynchops herschelensis | Late Campanian-Early Maastrichtian | Late Campanian-Early Maastrichtian | Campanian-Maastrichtian, Late Campanian-Early Maastrichtian | |
| Scalamagnus tropicensis | Turonian | Turonian | Turonian | |
| Edgarosaurus muddi | Late Albian | Late Albian | Albian, Late Albian | Life restoration of Edgarosaurus muddi |
| Eromangasaurus australis | Albian | Albian | Albian | Life restoration of Eromangasaurus australis |
| Manemergus anguirostris | Early Turonian | Early Turonian | Maastrichtian, Early Turonian | Fossil skeleton of Manemergus anguirostris |
| Nichollssaura borealis | Early Albian | Early Albian | Early Albian | Life restoration of two Nichollssaura borealis |
| Pahasapasaurus haasi | Cenomanian | Cenomanian | Cenomanian | |
| Plesiopleurodon wellesi | Earliest Cenomanian | Earliest Cenomanian | Cenomanian, Earliest Cenomanian | Life restoration of Plesiopleurodon wellesi |
| Plesiosaurus dolichodeirus | Late Sinemurian | Late Sinemurian | Sinemurian, Late Sinemurian | Life restoration of Plesiosaurus dolichodeirus |
| Plesiosaurus macrocephalus | Sinemurian | Sinemurian | Sinemurian | |
| Plesiosaurus longirostris | Toarcian | Toarcian | Toarcian | Skeletal mount of Hauffiosaurus longirostris |
| Pliosaurus brachydeirus | Early Kimmeridgian | Early Kimmeridgian | Kimmeridgian, Early Kimmeridgian | Life restoration of Pliosaurus brachydeirus |
| Pliosaurus portentificus | Kimmeridgian | Kimmeridgian | Kimmeridgian | |
| Pliosaurus brachyspondylus | Kimmeridgian | Kimmeridgian | | |
| Pliosaurus irgisensis | Tithonian | Tithonian | Tithonian | |
| Pliosaurus macromerus | Callovian-Tithonian | Callovian-Tithonian | Callovian-Tithonian | Lower jaw of Pliosaurus macromerus with restorative model. |
| Pliosaurus andrewsi | Callovian | Callovian | Callovian | |
| Polyptychodon interruptus | Turonian-Santonian | Turonian-Santonian | Turonian-Santonian | Life restoration of Polyptychodon interruptus |
| Elasmosaurus platyurus | Campanian | Campanian | Campanian | Life restoration of two Elasmosaurus platyurus |
| Polycotylus latipinnis | Santonian-Campanian | Santonian-Campanian | Santonian, Santonian-Campanian | Life restoration of a Polycotylus latipinnis giving birth |
| Liopleurodon rossicus | Tithonian | Tithonian | Tithonian | Life restoration of Pliosaurus rossicus --> |
| Liopleurodon pachydeirus | Callovian | Callovian | Callovian | |
| Liopleurodon ferox | Callovian | Callovian | Callovian | |
| Callawayasaurus colombiensis | Aptian | Aptian | Aptian | Skull of Callawayasaurus colombiensis |
| Kronosaurus boyacensis | Aptian-Albian | Aptian-Albian | Aptian-Albian | Life restoration of Kronosaurus boyacensis |
| Opallionectes andamookaensis | Aptian-Albian | Aptian-Albian | Aptian-Albian | |
| Kronosaurus queenslandicus | Aptian-Albian | Aptian-Albian | Aptian-Albian | Life restoration of Kronosaurus queenslandicus |
| Umoonasaurus demoscyllus | Aptian-Albian | Aptian-Albian | Aptian-Albian | Life restoration of Umoonasaurus demoscyllus |
| Simolestes keileni | Bajocian | Bajocian | Bajocian | |
| Maresaurus coccai | Bajocian | Bajocian | Bajocian | |
| Leptocleidus superstes | Barremian | Barremian | Barremian | Bones of Leptocleidus superstes |
| Yuzhoupliosaurus chengjiangensis | Bathonian | Bathonian | Bathonian | |
| Brancasaurus brancai | Berriasian | Berriasian | Berriasian | Skeleton of Brancasaurus brancai |
| Muraenosaurus leedsi | Callovian | Callovian | Callovian | Life restoration of Muraenosaurus leedsi |
| Cryptoclidus richardsoni | Callovian | Callovian | Callovian | |
| Tricleidus seeleyi | Callovian | Callovian | Callovian | Bones of Tricleidus seeleyi |
| Vinialesaurus caroli | Callovian | Callovian | Callovian | |
| Muraenosaurus beloclis | Callovian | Callovian | Callovian | |
| Peloneustes philarchus | Callovian | Callovian | Callovian | Life restoration of Peloneustes philarchus |
| Cryptoclidus eurymerus | Callovian | Callovian | Callovian | Life restoration of Cryptoclidus eurymerus |
| Simolestes vorax | Callovian | Callovian | Callovian | Life restoration of Simolestes vorax |
| Pachycostasaurus dawni | Callovian | Callovian | Callovian | |
| Terminonatator ponteixensis | Campanian | Campanian | Campanian | |
| Mauisaurus haasti | Campanian | Campanian | Campanian | Life restoration of Mauisaurus haasti |
| Dolichorhynchops osborni | Santonian-Campanian | Santonian-Campanian | Campanian, Santonian-Campanian | |
| Martinectes bonneri | Early Campanian | Early Campanian | Early Campanian | Skeletal mount of Martinectes bonneri |
| Tuarangisaurus keysei | Campanian-Maastrichtian | Campanian-Maastrichtian | Campanian-Maastrichtian | Skeleton of Tuarangisaurus keysei |
| Thalassomedon haningtoni | Cenomanian | Cenomanian | Cenomanian | Life restoration of Thalassomedon haningtoni |
| Brachauchenius lucasi | Cenomanian-Turonian | Cenomanian-Turonian | Cenomanian-Turonian | Life restoration of Brachauchenius lucasi |
| Leptocleidus clemai | Hauterivian-Barremian | Hauterivian-Barremian | Hauterivian-Barremian | |
| Thalassiodracon hawkinsii | Rhaetian-Hettangian | Rhaetian-Hettangian | Hettangian, Rhaetian-Hettangian | Life restoration of Thalassiodracon hawkinsii |
| Rhomaleosaurus megacephalus | Hettangian | Hettangian | Hettangian | Life restoration of Rhomaleosaurus megacephalus |
| Eurycleidus arcuatus | Hettangian | Hettangian | Hettangian | |
| Macroplata tenuiceps | Hettangian | Hettangian | Hettangian | Life restoration of Macroplata tenuiceps |
| Kimmerosaurus langhami | Kimmeridgian | Kimmeridgian | Kimmeridgian | |
| Bathyspondylus swindoniensis | Kimmeridgian | Kimmeridgian | Kimmeridgian | |
| Megalneusaurus rex | Kimmeridgian-Portlandian | Kimmeridgian-Portlandian | Kimmeridgian-Portlandian | Life restoration of Megalneusaurus rex |
| Colymbosaurus trochanterius | Kimmeridgian-Tithonian | Kimmeridgian-Tithonian | Kimmeridgian-Tithonian | Sacral vertebra] of Colymbosaurus trochanterius |
| Sinopliosaurus weiyuanensis | Kimmeridgian? | Kimmeridgian? | Kimmeridgian? | |
| Fresnosaurus drescheri | Maastrichtian | Maastrichtian | Maastrichtian | |
| Kaiwhekea katiki | Maastrichtian | Maastrichtian | Maastrichtian | Life restoration of Kaiwhekea katiki |
| Leurospondylus ultimus | Maastrichtian | Maastrichtian | Maastrichtian | Spine of Leurospondylus ultimus |
| Morenosaurus stocki | Maastrichtian | Maastrichtian | Maastrichtian | |
| Hydrotherosaurus alexandrae | Maastrichtian | Maastrichtian | Maastrichtian | |
| Thililua longicollis | Early Turonian | Early Turonian | Maastrichtian, Early Turonian | Life restoration of Sulcusuchus erraini |
| Sulcusuchus erraini | "Campanian/Maastrichtian" | "Campanian/Maastrichtian" | Maastrichtian, "Campanian/Maastrichtian" | |
| Tatenectes laramiensis | Oxfordian | Oxfordian | Oxfordian | |
| Pantosaurus striatus | Oxfordian | Oxfordian | Oxfordian | |
| Futabasaurus suzukii | Santonian | Santonian | Santonian | Life restoration of Futabasaurus suzukii |
| Georgiasaurus penzensis | Santonian | Santonian | Santonian | |
| Styxosaurus snowii | Santonian-Campanian | Santonian-Campanian | Santonian-Campanian | Life restoration of Styxosaurus snowii |
| Hydralmosaurus serpentinus | Santonian-Campanian | Santonian-Campanian | Santonian-Campanian | |
| Archaeonectrus rostratus | Sinemurian | Sinemurian | Sinemurian | Fossil of Archaeonectrus rostratus |
| Eretmosaurus rugosus | Sinemurian | Sinemurian | Sinemurian | Fossil of Eretmosaurus rugosus |
| Simolestes indicus | Tithonian | Tithonian | Tithonian | |
| Rhomaleosaurus cramptoni | Toarcian | Toarcian | Toarcian | Life restoration of Rhomaleosaurus cramptoni |
| Rhomaleosaurus victor | | | | |
| Bishanopliosaurus youngi | Toarcian | Toarcian | Toarcian | Life restoration of Bishanopliosaurus youngi |
| Occitanosaurus tournemirensis | Toarcian | Toarcian | Toarcian | |
| Hydrorion brachypterygius | Toarcian | Toarcian | Toarcian | Life restoration of Hydrorion brachypterygius |
| Microcleidus homalospondylus | Toarcian | Toarcian | Toarcian | Life restoration of Microcleidus homalospondylus |
| Microcleidus macropterus | Toarcian | Toarcian | Toarcian | |
| Sthenarasaurus dawkins | Toarcian | Toarcian | Toarcian | |
| Seeleysaurus guilelmiimperatoris | Toarcian | Toarcian | Toarcian | Life restoration of Seeleysaurus guilelmiimperatoris |
| Hauffiosaurus zanoni | Toarcian | Toarcian | Toarcian | Life restoration of Hauffiosaurus zanoni |
| Libonectes atlasense | Turonian | Turonian | Turonian | |
| Palmula quadratus | Turonian | Turonian | Turonian, Turonian | |
| Trinacromerum bentonianum | Turonian | Turonian | Turonian, Turonian | Life restoration of Trinacromerum bentonianum |
| Trinacromerum kirki | Turonian | Turonian | Turonian | Skeleton of Trinacromerum kirki |
| Libonectes morgani | Coniacian | Coniacian | Turonian, Coniacian | Life restoration of Libonectes morgani |
| Eopolycotylus rankini | Turonian | Turonian | Turonian, Turonian | |
| Leptocleidus capensis | Valanginian | Valanginian | Valanginian | Life restoration of Leptocleidus capensis |
| Pliosaurus funkei | | | | |
| Lusonectes sauvagei | | | | Bones of Lusonectes sauvagei |
| Djupedalia engeri | | | | |
| Avalonnectes arturi | | | | Avalonnectes arturi |
| Eoplesiosaurus antiquior | | | | Eoplesiosaurus antiquior |
| Stratesaurus taylori | | | | Stratesaurus taylori |
| Anningasaura lymense | | | | Skull of Anningasaura lymense |
| Zarafasaura oceanis | | | | Skull and neck of Zarafasaura oceanis |
| Westphaliasaurus simonsensii | Pliensbachian | Pliensbachian | Pliensbachian | |
| Marmornectes candrewi | | | | |
| Hauffiosaurus tomistomimus] | | | | |
| Meyerasaurus victor | | | Toarcian | Life restoration of Meyerasaurus victor |
| Megacephalosaurus eulerti | | | | |
| Gronausaurus wegneri | | | | |
| Cryonectes neustriacus | | | | Cryonectes neustriacus |
| Vectocleidus pastorum | | | | |
| Hastanectes valdensis | | | | |
| Spitrasaurus wensaasi | | | | |
| Spitrasaurus larseni | | | | |
| Nakonanectes bradti | Sinemurian | Sinemurian | | |
| Mauriciosaurus fernandezi | Early Turonian | Early Turonian | | |
| Polycotylus sopozkoi | | | | |
| Dawazisaurus brevis | | | | |
| Lariosaurus vosseveldensis | | | | |
| Stenorhynchosaurus munozi | | | | |
| Vegasaurus molyi | Early Maastrichtian | Early Maastrichtian | Early Maastrichtian | |
| Kawanectes lafquenianum | | | | |
| Atychodracon megacephalus | | | | Life restoration of Atychodracon megacephalus |
| Anguanax zignoi | | | | Anguanax zignoi |
| Pliosaurus patagonicus | | | | |
| Pliosaurus patagonicus | | | | |
| Pliosaurus carpenteri | Late Kimmeridgian | Late Kimmeridgian | Late Kimmeridgian | |
| Pliosaurus kevani | Early Kimmeridgian | Kimmeridgian | Early Kimmeridgian-Kimmeridgian | Pliosaurus kevani |
| Pliosaurus westburyensis | Late Kimmeridgian | Late Kimmeridgian | Late Kimmeridgian | |
| Luskhan itilensis | Hauterivian | Hauterivian | | |
| Arminisaurus schuberti | Late Pliensbachian | Late Pliensbachian | | Life restoration of Arminisaurus schuberti |
| Lagenanectes richterae | Early Hauterivian | Early Barremian | | Known material of Lagenanectes richterae with a human to scale |

## Footnotes

* 1 2 3 Berezin (2011); "Abstract", page 648.
* 1 2 3 Kubo, Mitchell, and Henderson (2012); "Abstract", page 557.
* 1 2 3 Otero et al. (2016); "Abstract".
* 1 2 3 Sennikov and Arkhangelsky (2010); "Abstract", page 567.
* 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 Smith (2007); "Appendix 1", page 257.
* 1 2 3 Otero et al. (2014); "Abstract", page 100.
* 1 2 3 Araújo et al. (2015); "Abstract", page 109.
* 1 2 3 4 5 6 Morgan (2016); "In-Group Taxa" (cont.), page 30.
* 1 2 3 Morgan (2016); "In-Group Taxa" (cont.), pages 30-31.
* 1 2 3 4 5 6 7 8 9 Morgan (2016); "In-Group Taxa" (cont.), page 32.
* 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 Smith (2007); "Appendix 1", page 258.
* 1 2 3 4 5 6 Morgan (2016); "Out-Group" (cont.), page 29.
* 1 2 3 4 5 6 7 8 9 Morgan (2016); "In-Group Taxa" (cont.), page 31.
* 1 2 3 Morgan (2016); "In-Group Taxa" (cont.), page 33.
* 1 2 3 Benson et al. (2013); "Pliosaurus brachydeirus Owen, 1841", page 5.
* 1 2 3 Morgan (2016); "In-Group Taxa", page 29.
* 1 2 3 Morgan (2016); "In-Group Taxa" (cont.), pages 29-30.
* 1 2 3 4 5 6 Morgan (2016); "Out-Group", page 28.
* 1 2 3 Morgan (2016); "In-Group Taxa" (cont.), page 34.
* 1 2 3 Morgan (2016); "In-Group Taxa" (cont.), pages 31-32.
* 1 2 3 Sato et al. (2014); "Phylogenetic and functional inferences", page 72.
* ↑ Smith (2007); "Appendix 1", page 257. Classified under the obsolete binomial "Rhomaleosaurus victor".
* 1 2 3 O'Gorman et al. (2015); "Abstract".
* 1 2 3 Benson et al. (2013); "Pliosaurus carpenteri n. sp.", pages 8-9.
* ↑ Benson et al. (2013); "Pliosaurus kevani n. sp.", page 5.
* 1 2 Benson et al. (2013); "Pliosaurus kevani n. sp.", page 5. Note that although Benson et al. describe the tentatively referred Pliosaurus kevani specimen CAMSM J.35990 and the Lower Kimmeridgian Aulacostephanus mutabilis Biozone from which it likely originated as Lower Kimmeridgian, their "Table 1" on page 25 regard both as Upper Kimmeridgian in age.
* 1 2 3 Benson et al. (2013); "Pliosaurus westburyensis n. sp.", page 5.