This is an incomplete list that briefly describes vertebrates that were extant during the Maastrichtian, a stage of the Late Cretaceous Period which extended from 72.1 to 66 million years before present. This was the last time period in which non-avian dinosaurs, pterosaurs, plesiosaurs, and mosasaurs existed.

Amphibians †Amphibians of the Maastrichtian Taxa Presence Location Description Images †Albanerpeton †Albanerpeton galaktion †Albanerpeton gracilis †Albanerpeton nexuosus 105.3–65.043 Ma, Albian to Maastrichtian Canada USA A salamander-like albanerpetontid that thrived in North America and Europe from the Early Cretaceous to the late Pliocene. †Beelzebufo †Beelzebufo ampinga 70 Ma Maevarano Formation, Mahajanga Province, Madagascar A horned frog. The largest frog to ever live, known to have grown to over and .†Habrosaurus †Habrosaurus dilatus Maastrichtian to Danian Lance Formation, Wyoming, USA Hell Creek Formation, Montana, USA A large sirenid, about the size of a hellbender. The palate is specialized for crushing, suggesting it may have fed on hard-bodied prey.†Paranecturus †Paranecturus garbanii Hell Creek Formation, Montana USA A proteid closely related to the modern mudpuppies.†Piceoerpeton †Piceoerpeton naylori Maastrichtian to Thanetian Wyoming & Montana, USA A scapherpetontid salamander, one of the largest-known salamanders.†Scotiophryne †Scotiophryne pustulosa 125–60.5 Ma, Aptian to Selandian Hell Creek Formation, Montana, USA Mexico Saskatchewan, Canada A little-known frog.

Dinosaurs

†Ornithischians

†Ankylosaurs †Ankylosaurs of the Maastrichtian Taxa Presence Location Description Images †Ankylosaurus †Ankylosaurus magniventris 68.5–66 MaHell Creek Formation, Montana, USA An ankylosaurine ankylosaurid. The largest-known ankylosaur, estimated at and up to 6 tonnes (13,000 lb). †Anodontosaurus †Anodontosaurus lambei 72.8–67 Ma, Campanian to Maastrichtian Horseshoe Canyon Formation, Alberta, Canada A medium-sized ankylosaurine ankylosaurid with a wide, pointed tail club.†Antarctopelta †Antarctopelta oliveroi 74–70 Ma, Campanian to Maastrichtian Santa Marta Formation, James Ross Island, Antarctica A medium-sized parankylosaur, reaching no more than in length, with characteristics of both polacanthids and nodosaurs.†Brachypodosaurus †Brachypodosaurus gravis 66 Ma Lameta Formation, India An ankylosaur, originally described as a stegosaur. †Denversaurus †Denversaurus schlessmani 68–66 Ma Lance Formation, South Dakota, USA An ankylosaur, originally described as a species of Edmontonia †Edmontonia †Edmontonia longiceps †Edmontonia schlessmani 76.5–69 Ma, Campanian to Maastrichtian Horseshoe Canyon Formation, Alberta, Canada Lance Formation, Wyoming, USA St. Mary River Formation, Alberta, Canada A nodosaur estimated to be roughly long. †Glyptodontopelta †Glyptodontopelta mimus 69–66 Ma Ojo Alamo Formation, New Mexico, USA A nodosaur once thought to be a species of Edmontonia.†Patagopelta †Patagopelta cristata 73-69 Ma, Campanian to Maastrichtian Allen Formation, Argentina A small nodosaur, the first euankylosaur from South America†Shanxia †Shanxia tianzhenensis 99-71 Ma, Cenomanian to Maastrichtian Huiquanpu Formation, Shanxi, China An ankylosaurine ankylosaurid which a few scientists consider a possible synonym of Tianzhenosaurus.†Stegouros †Stegouros elengassen 74–71 Ma, Campanian to Maastrichtian Dorotea Formation, Chile A small-sized Parankylosaur.†Struthiosaurus †Struthiosaurus austriacus †Struthiosaurus languedocensis †Struthiosaurus transylvanicus 85–66 Ma, Santonian to Maastrichtian Sanpetru Formation, Hunedoara County, Romania A struthiosaurine nodosaur, one of the smallest-known and most basal nodosaurs from the Late Cretaceous. †Tarchia †Tarchia kailanae 84.9–70.6 Ma, Santonian to Maastrichtian Barun Goyot Formation, Ömnögovi Province, Mongolia An ankylosaurine ankylosaurid, and one of the geologically youngest-known Asian ankylosaurs. It has an estimated body length of and weighing as much as 4.5 tonnes (5.0 short tons). †Tianzhenosaurus †Tianzhenosaurus youngi 99–70.6 Ma, Cenomanian to Maastrichtian Huiquanpu Formation, Shanxi, China An ankylosaurine ankylosaurid. Suggested by some to be a junior synonym of Saichania.

†Parksosauridae

†Thescelosaurids of the Maastrichtian Taxa Presence Location Description Images†Parksosaurus †Parksosaurus warreni 70 Ma Horseshoe Canyon Formation, Alberta, Canada A parksosaur that is one of the few basal neornithischians from the end of the Cretaceous.†Thescelosaurus †Thescelosaurus garbanii †Thescelosaurus neglectus †Thescelosaurus assiniboiensis 68–66 Ma Hell Creek Formation, South Dakota, USA Scollard Formation, Alberta, Canada A parksosaur known from several partial skeletons.

†Ornithopoda

†Ornithopods and †Hypsilophodonts of the Maastrichtian Taxa Presence Location Description Images†Adynomosaurus †Adynomosaurus arcanus 72-70 Ma Tremp Formation, Spain A lambeosaurine hadrosaur†Amurosaurus †Amurosaurus riabinini 70-66 Ma Udurchukan Formation, China, Russia A lambeosaurine hadrosaur†Arenysaurus †Arenysaurus ardevoli 66 Ma Spain A lambeosaurine hadrosaur†Augustynolophus †Augustynolophus morrisi 70–66 Ma Moreno Formation, California, USA A saurolophine hadrosaur originally thought to be a species of Saurolophus.†Barsboldia †Barsboldia sicinskii 70 Ma Nemegt Formation, Omnogovi Province, Mongolia A hadrosaur originally described as a lambeosaurine, now believed to instead be a saurolophine.†Blasisaurus †Blasisaurus canudoi 66 Ma Aren Formation, Spain A medium-sized lambeosaurine hadrosaur†Canardia †Canardia garonnensis 67.5–66 Ma Marnes d'Auzas Formation, Haute-Garonne, France A recently found lambeosaurine hadrosaur. †Charonosaurus †Charonosaurus jiayinensis 66 Ma Yuliangze Formation, Heilongjiang, China A lambeosaurine hadrosaur appearing similar in skull shape to Parasaurolophus. It was a very large lambeosaurine, with an estimated length of around long. †Edmontosaurus †Edmontosaurus regalis †Edmontosaurus annectens 73–66 Ma, Campanian to Maastrichtian Hell Creek Formation, Montana, USA Laramie Formation, Colorado, USA Horseshoe Canyon Formation, Alberta, Canada Frenchman Formation, Saskatchewan, Canada A well-known genus of saurolophine hadrosaur. E. annectens has been previously named Anatosaurus and Anatotitan. This was one of the largest hadrosaurids, measuring up to long and weighing around 4.0 metric tons (4.4 short tons). †Gilmoreosaurus †Gilmoreosaurus mongoliensis 70 Ma Iren Dabasu Formation, Inner Mongolia, China A hadrosauroid originally assigned as a species of Mandschurosaurus.†Gryposaurus †Gryposaurus notabilis †Gryposaurus latidens †Gryposaurus monumentensis †Gryposaurus alsatei? 83–74 Ma Dinosaur Park Formation, Alberta, Canada Two Medicine Formation, Montana, USA

Kaiparowits Formation, Utah, USA†Huaxiaosaurus †Huaxiaosaurus aigahtens 70 Ma Xingzhuang Formation, Shandong, China A large saurolophine hadrosaur, some of its estimated dimensions include a length of and a height of (in a tripodal posture) makes it one of the largest ornithopods known.†Hypacrosaurus †Hypacrosaurus altispinus 75–67 Ma, Campanian to Maastrichtian Horseshoe Canyon Formation, Alberta, Canada A lambeosaurine hadrosaur that has a tall, hollow rounded crest similar to Corythosaurus. The animal is estimated to have been around long, and to have weighed up to 4.0 tonnes (4.4 tons).†Kamuysaurus †Kamuysaurus japonicus 72.4-70.6 Ma Hakobucho Formation, Mukawa, Hokkaido, Japan An Edmontosaurini Saurolophine †Kerberosaurus †Kerberosaurus manakini 66 Ma Udurchukan Formation, Amur Oblast, Russia A saurolophine hadrosaur. †Koutalisaurus †Kerberosaurus manakini 67.5–66 Ma Tremp Formation, Province of Lleida, Catalonia, Spain A lambeosaurine hadrosaur†Kritosaurus †Kritosaurus navajovius 74–66 Ma, Campanian to Maastrichtian Kirtland Formation, New Mexico, USA A saurolophine hadrosaur†Kundurosaurus †Kundurosaurus nagornyi 67–66 Ma Udurchukan Formation, Amur Oblast, Russia A saurolophine hadrosaur†Lapampasaurus †Lapampasaurus cholinoi 76–70 Ma, Campanian to Maastrichtian Allen Formation, La Pampa Province, Argentina A hadrosaur named in honor the late collector Jose Cholino. It is one of the few hadrosaurs to live in Gondwana.†Mandschurosaurus †Mandschurosaurus amurensis †Mandschurosaurus laosensis 66 Ma Yuliangze Formation, Heilongjiang, China A poorly-known hadrosaur. †Microhadrosaurus †Microhadrosaurus nanshiungensis Nanxiong Formation, Guangdong, China A hadrosaur based on juvenile remains.†Morrosaurus †Morrosaurus antarcticus 70–66 Ma Snow Hill Island Formation, James Ross Island, Antarctica An elasmarian iguanodont that was a medium-sized animal. The descriptors were able to establish some distinctive features. Two of these are autapomorphies, i.e. derived features that are unique. In bottom view, the greater trochanter of the femur has an undulating profile with a thick edge output and a main thin edge. The fourth metatarsal bone has a triangular profile with a rearward projection that wraps around her and the third metatarsal. In addition, there is a unique combination of two features that by themselves are not unique features. In the femur, the lesser trochanter is inclined diagonally, right next to the greater trochanter. In the tibia, medial malleolus has a triangular outline view showing a front concave surface. †Nanningosaurus †Nanningosaurus dashiensis 72.1–66 Ma, Maastrichtian Guangxi, China A lambeosaurine hadrosaur known from an incomplete skeleton including skull, arm, and hip remains. The first hadrosaur discovered in southern China. †Olorotitan †Olorotitan arhanensis 72–66 Ma durchukan Formation, Amur Oblast, Russia A lambeosaurine hadrosaur. †Orthomerus †Orthomerus dolloi 66 Ma Maastricht Formation, Limburg, Netherlands Belgium An obscure genus of hadrosaur. In the past it was conflated with the much better known Telmatosaurus. †Pararhabdodon †Pararhabdodon isonensis 67.5–66 Ma Tremp Formation, province of Lleida, Catalonia, Spain A lamebosaurine hadrosaur†Pareisactus †Pareisactus evrostos 67.5–66 Ma Spain A rhabdodontid known from a scapula.†Rhabdodon †Rhabdodon priscus 70–66 Ma Romania Spain France Czech Republic A rhabdodontid common in Cretaceous Europe. †Riabininohadros †Riabininohadros weberae 72–66 Ma Ukraine A genus of styracosternan ankylopollexian that was unearthed in Ukraine. †Sahaliyania †Sahaliyania elunchunorum 68–66 Ma Yuliangze Formation, Heilongjiang, China A lambeosaurine hadrosaur known only from a few remains. †Saurolophus †Saurolophus angustirostris †Saurolophus osborni 70–66 Ma Nemegt Formation, Omnogovi Province, Mongolia Horseshoe Canyon Formation, Alberta, Canada A saurolophine hadrosaur distinguished by a spike-like cranial crest. †Secernosaurus †Secernosaurus koerneri Argentina A saurolophine hadrosaur once considered to be a species of Kritosaurus. It is one of the few Gondwanan hadrosaurs.†Sektensaurus †Sektensaurus sanjuanboscoi 80–66 Ma Lago Colhué Huapí Formation, Patagonia, Argentina A possible elasmarian ornithopod from Patagonia. The first non-hadrosaurid ornithopod of central Patagonia. †Shantungosaurus †Shantungosaurus giganteus 70 Ma Wangshi Group, Shandong, China A saurolophine hadrosaur, the largest-known Hadrosaur, and one of the largest-known ornithischians, estimated to be over in length and weighing as much as 16 tonnes (18 short tons). †Telmatosaurus †Telmatosaurus transsylvanicus 70–66 Ma Sanpetru Formation, Hunedoara County, Romania A relatively small hadrosaur, approximately long.†Tethyshadros †Tethyshadros insularis 70 Ma Liburnia Formation, Province of Trieste, Friuli-Venezia Giulia, Italy A relatively small species of hadrosauroid. It had a length of about and a weight of . †Thespesius †Thespesius occidentalis 66 Ma Lance Formation, South Dakota, USA A dubious saurolophine hadrosaur notable for its taxonomic history†Trinisaura