United States - Animals in the Habitats and the Fossil sites, and Biodiversity
Classified animal picture guide. Highlighting the link 
of species shows the images, and clicking the link shows Evolutionary Tree.
of species shows the images, and clicking the link shows Evolutionary Tree.The following fossils from the geologic age to the prehistorical age are excavated in United States. The explanation in brackets is the ages they lived in extinct species. Note that Mya is million years ago. For example, "48.6～40.4 Mya" shows a range between 48.6 and 40.4 million years ago. The time range is shown in the Geological Time Table. The followings are a part of the Evolutionary Tree.
| United States prehistoric age | ||||
| United States extinct species Paleozoic |
 | Mammal-like reptile |
Archaeothyris (307.1～305 Mya; Earliest mammal-like reptile),
Edaphosaurus (302～272.5 Mya; Large sail on back),
Dimetrodon (290～272.5 Mya; Large sail on back),
Casea (279.5～272.5 Mya),
Cotylorhynchus (279.5～268 Mya),
Tetraceratops (279.5～272.5 Mya) | |
| Primitive reptile |
Protorothyris (299～290 Mya),
Bolosaurus (299～272.5 Mya),
Araeoscelis (284～272.5 Mya),
Labidosaurus (279.5～272.5 Mya) | ||
| Primtive tetrapod |
Baphetes (359.2～299 Mya),
Megalocephalus (318～299 Mya) | ||
| Primitive amphibia |
Crassigyrinus (345.3～328.3 Mya),
Phlegethontia (307.1～305 Mya; Snake-like amphibia),
Eryops (305～272.5 Mya),
Platyhystrix (299～284 Mya; Large sail on back),
Diplocaulus (284～253.8 Mya; Body like arrow),
Cacops (279.5～272.5 Mya),
Pantylus (279.5～272.5 Mya),
Metoposaurus (228～203.6 Mya) | ||
| Ancestor of reptile |
Proterogyrinus (318～299 Mya),
Archeria (299～272.5 Mya),
Diadectes (290～272.5 Mya; Ancestors of amniotes),
Tseajaia (299～272.5 Mya),
Seymouria (284～272.5 Mya; Many reptilian features) | ||
 | Jawless fish |
Astraspis (460.5～450 Mya) | ||
| Armoured fish |
Dunkleosteus (376.1～359.2 Mya; １０m),
Turrisaspis (374～359 Mya) | ||
| Cartilaginous fish |
Belantsea (326.4～312 Mya),
Falcatus (326.4～312 Mya),
Stethacanthus (326.4～279.5 Mya),
Echinochimaera (328.3～318.1 Mya),
Edestus (318.1～260.5 Mya),
Orodus (302～290 Mya),
Helicoprion (279.5～268 Mya; Spiral Saw),
Hybodus (268～65.5 Mya; Great Dying③④) | ||
| Spiny shark |
Acanthodes (409.1～284 Mya; Great Dying②) | ||
| Lobe-finned fish |
Hyneria (360 Mya; ４m),
Allenypterus (354～290 Mya),
Caridosuctor (328.3～318.1 Mya),
Hadronector (328.3～318.1 Mya),
Ceratodus (249.7～70.6 Mya; Great Dying④) | ||
| Ray-finned fish |
Lepidotes (245～70.6 Mya; Great Dying④) | ||
| Anomalocaridid |
Anomalocaris (530～501 Mya; ６０cm) | ||
| Arachnomorpha |
Canadaspis (520～501 Mya),
Sidneyia (516～501 Mya) | ||
 | Trilobite |
Olenoides (530～490 Mya),
Naraoia (520～501 Mya),
Elrathia (513～488.3 Mya),
Asaphiscus (513～488.3 Mya),
Triarthrus (488.3～445.6 Mya),
Isotelus (479～445.6 Mya; ７２cm),
Phacops (460.5～345.3 Mya; Great Dying①),
Huntoniatonia (418.1～412.3 Mya) | ||
 | Sea scorpion |
Pterygotus (439～359.2 Mya; ２．３m),
Erieopterus (426.2～412.3 Mya),
Adelophthalmus (416～251 Mya; Great Dying②) | ||
| Giant insect |
Arthropleura (340～280 Mya; ２．６m),
Mazothairos (312～305 Mya; ５５cm),
Meganeuropsis (284～279.5 Mya; ７１cm) | ||
| Primitive mollusc |
Hyolithes (530～253.8 Mya; Great Dying①②) | ||
| Primitive cephalopod |
Cameroceras (488.3～445.6 Mya; ９m),
Endoceras (488.3～443.7 Mya),
Orthoceras (479～203.6 Mya; Great Dying①②③),
Cyrtoceras (460.5～345.3 Mya; Great Dying①②) | ||
 | Ammonite |
Goniatites (409.1～332.9 Mya; Great Dying②) | ||
| United States extinct species Mesozoic |
| Mammal-like reptile |
Oligokyphus (196.5～183 Mya) | |
| Primitive mammal |
Adelobasileus (228～216.5 Mya; Earliest mammals),
Morganucodon (203.6～189.6 Mya; Great Dying④),
Docodon (150.8～145.5 Mya) | ||
 | Primitive turtle |
Hypsognathus (228-199.6 Mya) | ||
| Turtle |
Glyptops (155.7～99.6 Mya),
Dinochelys (150.8～145.5 Mya),
Protostega (99.6～70.6 Mya; ２．７m),
Archelon (83.5～70.6 Mya; ４m),
Terlinguachelys (83.5～70.6 Mya),
Emarginachelys (70.6～65.5 Mya) | ||
| Ancestors of snake,lizard |
Icarosaurus (228～216.5 Mya; Wing-like glider) | ||
 | Lizard |
Opisthias (155.7～136.4 Mya) | ||
 | Snake |
Palaeophis (70.6～33.9 Mya; Great Dying⑤; ９m) | ||
| Marine reptile |
Cymbospondylus (249.7～228 Mya),
Thalattosaurus (228-216.5 Mya),
Shastasaurus (228～216.5 Mya),
Shonisaurus (228～203.6 Mya; ２１m),
Platypterygius (136.4～89.3 Mya) | ||
| Marine lizard |
Eonatator,
Mosasaurus (99.6～65.5 Mya; １８m),
Globidens (99.6～70.6 Mya),
Tylosaurus (93.5～65.5 Mya),
Platecarpus (89.3～65.5 Mya) | ||
 | Primitive crocodile |
Protosuchus (199.6～196.5 Mya; First crocodile),
Goniopholis (167.7～65.5 Mya),
Eutretauranosuchus (155.7～150.8 Mya) | ||
| Crocodile |
Wannaganosuchus (83.5～42 Mya; Great Dying⑤),
Deinosuchus (83.5～1.81 Mya; Great Dying⑤),
Procaimanoidea (70.6～42 Mya; Great Dying⑤) | ||
| Archosaurs |
Hyperodapedon (228～203.6 Mya),
Cteniogenys (167.7～145.5 Mya) | ||
 | Flying reptile |
Kepodactylus (155.7～145.5 Mya),
Pteranodon (89.3～70.6 Mya),
Quetzalcoatlus (70.6～65.5 Mya; １２m) | ||
| Primitive ornithischia |
Heterodontosaurus (196.5～175.6 Mya),
Othnielosaurus (155.7～145.5 Mya) | ||
 | Amored dino |
Scelidosaurus (206～200 Mya),
Scutellosaurus (199.6～175.6 Mya),
Stegosaurus (155.7～99.6 Mya; Large plates on back),
Hesperosaurus (150 Mya),
Edmontonia (83.5～65.5 Mya) | ||
 | Bird-hipped dino |
Tichosteus (155.7～150.8 Mya),
Camptosaurus (155.7～145.5 Mya),
Iguanodon (155.7～93.5 Mya),
Orodromeus (85.8～65.5 Mya) | ||
 | Duck-billed dino |
Gryposaurus (83.5～70.6 Mya),
Corythosaurus (83.5～70.6 Mya),
Edmontosaurus (83.5～65.5 Mya; １３m),
Parasaurolophus (83.5～65.5 Mya; Large cranial crest) | ||
 | Thick-headed dino |
Pachycephalosaurus (83.5～65.5 Mya; Large thick head) | ||
 | Horned dino |
Centrosaurus (83.5～70.6 Mya),
Styracosaurus (83.5～70.6 Mya),
Chasmosaurus (83.5～70.6 Mya; Large frill on head),
Triceratops (83.5～65.5 Mya) | ||
 | Long-necked dino |
Massospondylus (196.5～65.5 Mya),
Diplodocus (155.7～145.5 Mya),
Amphicoelias (155.7～145.5 Mya; ６０m),
Nigersaurus (145.5～99.6 Mya; Unusual mouth),
Sauroposeidon (125～99.6 Mya; ３４m) | ||
 | Predatory dino |
Megapnosaurus (199～188 Mya),
Dilophosaurus (196.5～189.6 Mya) | ||
 | Large predatory dino |
Allosaurus (161.2～145.5 Mya),
Torvosaurus (155.7～145.5 Mya),
Saurophaganax (155.7～145.5 Mya),
Acrocanthosaurus (150.8～112 Mya),
Gorgosaurus (83.5～65.5 Mya),
Albertosaurus (83.5～65.5 Mya),
Tyrannosaurus (83.5～65.5 Mya; １３m) | ||
 | Ostrich dino |
Ornithomimus (112～63.3 Mya),
Struthiomimus (83.5～65.5 Mya) | ||
| Bird's relative dino |
Dromaeosaurus (145.5～65.5 Mya),
Deinonychus (125～99.6 Mya),
Bambiraptor (83.5～70.6 Mya),
Chirostenotes (83.5～65.5 Mya) | ||
| Salamander-like |
Albanerpeton (130-1.81 Mya; Great Dying⑤) | ||
 | Frog |
Prosalirus (196.5～183 Mya) | ||
 | Primitive bird |
Ichthyornis (99.6～70.6 Mya),
Parahesperornis (89.3～83.5 Mya),
Baptornis (89.3～70.6 Mya; Swimming bird with fin),
Hesperornis (89.3～65.5 Mya; １．５m),
Potamornis (70.6～65.5 Mya) | ||
| Cartilaginous fish |
Cretoxyrhina (99.6～65.5 Mya) | ||
| Ray-finned fish |
Protosphyraena (99.6～70.6 Mya),
Ichthyodectes (99.6～70.6 Mya),
Xiphactinus (99.6～65.5 Mya) | ||
| Ammonite |
Crioceratites (140.2～99.6 Mya),
Desmoceras (130～112 Mya),
Euhoplites (112～93.5 Mya),
Acanthoceras (112～89.3 Mya),
Kamerunoceras (99.6～89.3 Mya),
Parapuzosia (99.6～70.6 Mya; １．９５m),
Pachydiscus (93.5～65.5 Mya; ２m),
Exiteloceras (93.5～65.5 Mya) | ||
| United States extinct species Cenozoic |
 | Primate |
Pelycodus (55.4～50.3 Mya),
Teilhardina (55.4～50.3 Mya),
Hesperolemur (55.4～42 Mya),
Notharctus (55.4～42 Mya),
Smilodectes (50.3～46.2 Mya) | |
 | Primitive elephant |
Gomphotherium (23.8～0.01 Mya),
Platybelodon (13.7～5.33 Mya),
Gnathabelodon (13.6～10.3 Mya; Spoon-billed Mastodon),
Amebelodon (13.6～8.7 Mya; ６m),
Cuvieronius (10.3～0.011 Mya; ６m) | ||
| Elephant |
Pygmy mammoth (0.126～0.01 Mya),
American mammoth (4.9～0.011 Mya; ４．９m),
American mastodon (23.03～0.012 Mya; ５m) | ||
| Paenungulata |
Behemotops (33.9～23.03 Mya),
Kronokotherium (33.9～23.03 Mya),
Cornwallius (28.4～23.03 Mya),
Desmostylus (28.4～7.25 Mya),
Paleoparadoxia (23.03～7.25 Mya),
Vanderhoofius (15.97～11.61 Mya) | ||
 | Sea-cow |
Dusisiren (15.97～3.6 Mya),
Cuesta Sea Cow (5.33～-2.59 Mya) | ||
 | Primitive armadillo |
Holmesina (3.6～0.01 Mya),
Glyptodon (3.6～0.01 Mya; ３m) | ||
 | Sloth |
Megalonyx (10.3～0.01 Mya) | ||
 | Ground sloth |
Thinobadistes (13.6～4.9 Mya),
Nothrotheriops (4.9～0.01 Mya),
Glossotherium (6.8～0.01 Mya) | ||
| Primate's relative |
Purgatorius (65～56.8 Mya; Proto-primate) | ||
 | Rodent |
Ischyromys,
Palaeocastor (33.3～23.03 Mya; Beaver) | ||
 | Primitive whale |
Protocetus (48.6～37.2 Mya),
Georgiacetus (40.4～37.2 Mya),
Zygorhiza (40.4～37 Mya),
Basilosaurus (40.4～33.9 Mya; ２５m),
Dorudon (40.4～33.9 Mya) | ||
| Whale |
Squalodon (33.9～1.81 Mya),
Cetotherium (20.43～1.81 Mya),
Eobalaenoptera (15.97～13.65 Mya) | ||
| Ungulate |
Phenacodus (63.3～48.6 Mya),
Mesonyx (50.3～42 Mya),
Uintatherium (50.3～42 Mya) | ||
 | Even-toed ungulate |
Diacodexis (55.4～46.2 Mya),
Archaeotherium (38～24.8 Mya),
Merycoidodon (38-16.3 Mya),
Leptomeryx (37.2～24.8 Mya),
Daeodon (37.2～16.3 Mya; Terrible hog),
Protoceras (33.9～20.6 Mya),
Protolabis (29～10.3 Mya),
Aepycamelus (20.6～4.9 Mya; Giraffe-like camel),
Longirostromeryx (16.3～10.3 Mya),
Synthetoceras (13.6～5.33 Mya),
Hemiauchenia (13.6～0.01 Mya; Stilt-legged Llama),
Capromeryx (13.6～0.01 Mya),
Titanotylopus (10.3～0.3 Mya; Giraffe-like camel) | ||
| Rhino-like |
Eotitanops (55.4～46.2 Mya),
Palaeosyops (50.3～42 Mya),
Metamynodon (46.2～33.3 Mya),
Hyracodon (46.2～26.3 Mya),
Protitanops (42～33.9 Mya),
Megacerops (38～33.9 Mya; ５m) | ||
| Rhinocero |
Subhyracodon (38～26.3 Mya),
Diceratherium (33.9～11.61 Mya),
Menoceras (23.03～16.3 Mya),
Teleoceras (16.9～4.9 Mya) | ||
| Horse |
Hyracotherium (55.4～48.6 Mya; Four-toed Horse),
Orohippus (55.4～42 Mya; Three-toed Horse),
Mesohippus (42～30.8 Mya; Three-toed Horse),
Miohippus (38～20.43 Mya; Three-toed Horse),
Archaeohippus (30.8～13.6 Mya),
Parahippus (26.3～15.97 Mya),
Hippidion (23.03～0.01 Mya),
Merychippus (20.4～10.3 Mya; Three-toed Horse),
Protohippus (16.3～4.9 Mya),
Pliohippus (16.3～4.9 Mya),
Cormohipparion (13.65～0.3 Mya),
Astrohippus (13.6～5.33 Mya),
Hipparion (12.7～0.01 Mya; Three-toed Horse),
Dinohippus (11.61～3.6 Mya) | ||
 | Pangolin-like |
Pantolambda (63.3～56.8 Mya),
Barylambda (60.2～50.3 Mya),
Titanoides (58.7～55.8 Mya),
Coryphodon (56.8～46.2 Mya),
Trogosus (55.4-46.2 Mya) | ||
| Carnivora-like |
Oxyaena (55.4～33.9 Mya),
Machaeroides (55.4～46.2 Mya),
Patriofelis (50.3～42 Mya),
Hyaenodon (42～15.97 Mya) | ||
 | Saber-toothed cat |
Dinictis (38～20.6 Mya),
Hoplophoneus (38～20.6 Mya),
Eusmilus (37.2～28.4 Mya; ２．５m),
Nimravus (33.3～26.3 Mya),
Homotherium (13.65～0.01 Mya),
Barbourofelis (13.6～4.9 Mya),
Machairodus (11.61～0.126 Mya; ２．５m),
Megantereon (10.3～1.8 Mya),
Xenosmilus (1.8～0.3 Mya),
Smilodon (1.81～0.01 Mya; ２．１m) | ||
 | Carnivora |
Cynodictis (37.2～28.4 Mya; Bear-dog),
Leptocyon (24.8～10.3 Mya; Dog),
Aelurodon (20.6～4.9 Mya; Dog),
Amphicyon (20～1.81 Mya; Bear-dog),
Pseudaelurus (16.9～0.126 Mya; Cat),
Hemicyon (16.9～13.65 Mya; Dog-bear),
Cynarctus (15.97～10.3 Mya; Dog),
Agriotherium (13.6～2.6 Mya; Dog-bear),
Dinofelis (9～1.8 Mya; Cat),
Metailurus (9～0.126 Mya; Cat),
Chasmaporthetes (4.9～0.781 Mya; Hyena),
Florida Cave Bear (4.9-0.01 Mya) | ||
 | Marine mammal |
Allodesmus (23.03～7.25 Mya) | ||
| Turtle |
Stylemys (38～28.4 Mya),
Hesperotestudo (20.6～0.01 Mya) | ||
| Primitive crocodile |
Hyposaurus (65.5～61.7 Mya) | ||
| Crocodile |
Ceratosuchus (55.8-55.4 Mya),
Gavialosuchus (33.9～0.01 Mya; ９．７５m) | ||
 | Terror bird |
Titanis (4.9～1.8 Mya; ２．５m) | ||
 | Raptor |
Apatosagittarius (11.6～5.3 Mya),
Teratornis (1.81～0.01 Mya; ３．８m),
Aiolornis (0.126～0.011 Mya; ５m) | ||
 | Crane |
Crowned Crane (23～5.3 Mya) | ||
 | Shark |
Carcharodon megalodon (23.03～3 Mya; ２０m) | ||
| United States extinct species Quaternary |
| Armadillo |
Beautiful Armadillo (1.81～0.01 Mya),
Glyptotherium (1.81～0.01 Mya) | |
| Ground sloth |
Eremotherium (1.81～0.01 Mya; ６m),
Paramylodon (1.81～0.01 Mya) | ||
| Elephant |
Columbian mammoth (0.781～0.01 Mya) | ||
| Rodent |
Castoroides (1.8～0.01 Mya; ２．５m) | ||
| Even-toed ungulate |
American Camel (1.81～0.01 Mya),
Steppe Wisent (1.8～0.01 Mya),
Ancient Bison (1.81～0.01 Mya),
Giant Bison (0.781～0.01 Mya) | ||
| Carnivora |
American Lion (2～0.01 Mya),
Giant Short-faced Bear (1.81～0.01 Mya),
American cheetah (1.81～0.01 Mya),
Dire Wolf (1.81～0.01 Mya) | ||
| Bird |
La Brea Stork (0.126～0.01 Mya) | ||
United States is a country located in Notrh America. It is the third largest country. It bordered by Mexico to the south and by Canada to the north, and by the Pacific Ocean to the west and by the Atlantic Ocean to the west, and by the Arctic Ocean to the north. There is the Rockies in the west, and the Mississippi river in the central. The following shows the distribution of animals in United States.
