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Last season was a great season at the quarry. For those who dont know, our quarry is in the Fossil Butte member of the Green River Formation in southern Wyoming. We ended up with three turtles coming out. Two of them were large turtles, 48" (Apalone heteroglypta) and 52" (Chisternon undatum), and they were found stacked above one another, separated by only 7 inches, and a tiny little guy that is a new species. I will post pictures of these amazing fossils as they are finished up. We have Brock @ebrocklds doing the preparation work for us on these three amazing fossils. Here are pictures of the Apalone. You can see it took us a bit of time to excavate and collect all of the tiny pieces. It was in a large fracture zone in the rock. Enjoy.
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Hello from Colorado, the wife and I do a lot of exploring in northern Colorado and southern Wyoming. Been lurking on this forum for awhile. Decided it was time to join.
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Hello Fossil Fans- What are you guys doing on the first weekend of June? I am here to invite you all to the annual Tate Conference happening at the Tate Geological Museum in Casper, Wyoming in June. We have 13 paleobotanists coming to town for a day of talks (sat June 2) and two days of field trips. Field trips are to 1) a Cretaceous plant site near Worland, WY called Big Cedar Ridge which preserves plant in 3d in situ condition... Pretty Cool. and 2) a coal mine in Gillette, WY to collect Paleocene leaves. Here is the link for more info and for registration info: https://www.caspercollege.edu/tate-geological-museum/events/conference The Fossil Forum member jpc will be MC and guy-who-does-all-sorts-of-things. Hope to see a few of you there. The talks are as such: •Sarah Allen, Florissant Fossil Beds National Monument "Reconstructing the paleoecology and paleoclimatology of an early Eocene site in southwestern Wyoming using plant fossils." •Keith Berry, Hoehne Schools "Rediscovering the Vermejo and Raton Megafloras 100 Years after W.T. Lee and F.H. Knowlton." •Karen Chin, University of Colorado "Direct evidence of herbivory by non-avian dinosaurs in the Cretaceous." •Regan Dunn, Field Museum "Forest Canopy Response to Greenhouse Warming at the Paleocene-Eocene Thermal Maximum." •Patricia Gensel, University of North Carolina Chapel Hill "It (almost) all happened in the Devonian- a current view of early land plants." •Andrew Leslie, Brown University "The Mesozoic roots of modern conifer cones." •Steve Manchester, Florida Museum of Natural History "The inside story on Paleocene fruits and seeds: new discoveries from micro-CT scanning of fossiliferous sediments from the Fort Union Formation in central Wyoming." •Ian Miller, Denver Museum of Nature and Science "The Campanian Vegetation of Laramidia." •Mike Rischbieter, Presbyterian College "The palynology and paleobotany of the lower Permian Alfredo Wagner locality in Santa Catarina State, Brazil." •Lauren Azevedo Schmidt, University of Wyoming "The effects of climate variables on plant and insect herbivore communities across the Paleocene Eocene boundary, Hanna Basin WY." •Selena Y. Smith, University of Michigan "Dead plants tell no lies: fossil insights about the evolution of monocot flowering plants." •Elisabeth Wheeler, North Carolina State University "The inside story on Yellowstone’s spectacular fossil forests Or Yellowstone. Not just geysers and grizzlies – fantastic fossil forests." Plus a couple of posters Beth Southwell, Laramie, Wyoming and Brent Breithaupt, BLM Wyoming State Office "The 19th Century Discovery of Fossil Cycads, Morrison Formation, Carbon County, Wyoming." Matthew Parker,Casper College and J-P Cavigelli, Tate Geological Museum "Fossil Plant specimens in the Tate Museum Collections."
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The wife and I finally got to explore a hill that I had been looking at for years. This was in early September of 2016. The back roads of Northern Colorado enjoy the scenery. Didn't take very long to start finding things. All I had with me was a water bottle for size. The ridge we were standing on.
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Been lurking here on your forum for a long time. I really enjoy the pictures and stories. Back in 2013 I was exploring, fixing fence on a ranch in the Shirley Basin area of Wyoming. Not to far from the famous Como Bluffs. Found this in the creek. At one time I had contacted a gentleman (Neil Lander)? from the museum of natural science I believe was in New York. He gave me the name and the time it lived. My computer crashed and I lost it all. If one of you could help I would appreciate it. The large one with the spikes. About 13 inches across, spikes are 2 inches. Thanks
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I picked up this treasure in Tucson, because I have always wanted one, and had never been able to afford on till then. Species: Mioplosus and Knightia Location: Green River, Wyoming continued....
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This one's a bit of an odd critter; an ancient monitor lizard with eyes in the back of its head: http://www.sciencemag.org/news/2018/04/four-eyed-lizard-walked-earth-49-million-years-ago
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Carpopenaeus callirostris Fossilized Shrimp 1.jpg
Dpaul7 posted a gallery image in Member Collections
From the album: MY FOSSIL Collection - Dpaul7
Diplomystus dentatus Fish Fossil GREEN RIVER formation, Kemmerer, Wyoming USA Eocene age (56 Million years ago) Diplomystus is an extinct genus of freshwater clupeomorph fish distantly related to modern-day extant herrings, alewives, and sardines. The genus was first named and described by Edward Drinker Cope in 1877. There are seven species of Diplomystus: D. dentatus (Cope, 1877), D. birdii, D. dubetreiti, D. shengliensis (Chang 1983), D. kokuraensis (Uyeno 1979), D. primotinus (Uyeno 1979), and D. altiformis. D. dentatus (Cope, 1877) is well known from lower Eocene deposits from the Green River Formation in Wyoming. Specimens range from larval size to 65 cm and are commonly found in close association with the extinct herring Knightia sp. The Green River Formation is the remnant of a large lake whose mud would eventually be transformed into soft calcite-bearing shale. D. kokuraensis (Uyeno 1979), D. primotinus (Uyeno 1979), and D. altiformis were dominant members of an Early Cretaceous lake fauna (the "Diplomystus-Wakinoichthys Fauna") in what is now Japan and Korea. Dimensions: 4.6 Inches Long & 3 Inches Wide (Plate) Fish is 4.2 Inches Long & 1.5 Inch Wide. Diplomystus Dentatus morphology, including its upturned mouth, is prototypic of a surface feeding fish. The genus is herrings that likely fed on small surface-dwelling fish as Knightia is evidenced by numerous fossils found with Knightia is the stomach or mouth. The unusual chemistry of fossil lake prevented decay and scavenging of dead organisms while millimeter-thick layers of alternating limestone matter slowly accumulated. The result is laminated limestones that contained the highest concentration of fossil fish in the world. These fish, other aquatic organisms, and associated geologic features make Fossil Lake the world's best Paleogene record of the freshwater lake ecosystem. Kingdom: Animalia Phylum: Chordata Class: Actinopterygii Order: Clupeiformes Family: †Ellimmichthyidae Genus: †Diplomystus Species: †dentatus -
My family stumbled across quite a few pieces of fossilized bone over the weekend in Southeast Wyoming. We counted 40+ pieces that are between 2-6” in height and oval in shape. They were spread out over an area approx 40’ wide. We also found what might be a tooth along with sereral other unidentifiable pieces. This was a very exciting find for us and I would love to learn more about what (or who) we found! Please let me know if you need additional photographs or any other info.
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From the album: MY FOSSIL Collection - Dpaul7
Diplomystus Dentatus Fish Fossil Green River Formation, Wyoming Eocene age (56 Million years ago) Diplomystus is an extinct genus of freshwater clupeomorph fish distantly related to modern-day extant herrings, alewives, and sardines. The genus was first named and described by Edward Drinker Cope in 1877. There are seven species of Diplomystus: D. dentatus (Cope, 1877), D. birdii, D. dubetreiti, D. shengliensis (Chang 1983), D. kokuraensis (Uyeno 1979), D. primotinus (Uyeno 1979), and D. altiformis. D. dentatus (Cope, 1877) is well known from lower Eocene deposits from the Green River Formation in Wyoming. Specimens range from larval size to 65 cm and are commonly found in close association with the extinct herring Knightia sp. The Green River Formation is the remnant of a large lake whose mud would eventually be transformed into soft calcite-bearing shale. D. kokuraensis (Uyeno 1979), D. primotinus (Uyeno 1979), and D. altiformis were dominant members of an Early Cretaceous lake fauna (the "Diplomystus-Wakinoichthys Fauna") in what is now Japan and Korea. Dimensions: 4.6 Inches Long & 3 Inches Wide (Plate) Fish is 4.2 Inches Long & 1.5 Inch Wide. Diplomystus Dentatus morphology, including its upturned mouth, is prototypic of a surface feeding fish. The genus is herrings that likely fed on small surface-dwelling fish as Knightia is evidenced by numerous fossils found with Knightia is the stomach or mouth. The unusual chemistry of fossil lake prevented decay and scavenging of dead organisms while millimeter-thick layers of alternating limestone matter slowly accumulated. The result is laminated limestones that contained the highest concentration of fossil fish in the world. These fish, other aquatic organisms, and associated geologic features make Fossil Lake the world's best Paleogene record of the freshwater lake ecosystem. Kingdom: Animalia Phylum: Chordata Class: Actinopterygii Order: Clupeiformes Family: †Ellimmichthyidae Genus: †Diplomystus Species: †dentatus -
From the album: MY FOSSIL Collection - Dpaul7
Diplomystus Dentatus Fish Fossil Green River Formation, Wyoming Eocene age (56 Million years ago) Diplomystus is an extinct genus of freshwater clupeomorph fish distantly related to modern-day extant herrings, alewives, and sardines. The genus was first named and described by Edward Drinker Cope in 1877. There are seven species of Diplomystus: D. dentatus (Cope, 1877), D. birdii, D. dubetreiti, D. shengliensis (Chang 1983), D. kokuraensis (Uyeno 1979), D. primotinus (Uyeno 1979), and D. altiformis. D. dentatus (Cope, 1877) is well known from lower Eocene deposits from the Green River Formation in Wyoming. Specimens range from larval size to 65 cm and are commonly found in close association with the extinct herring Knightia sp. The Green River Formation is the remnant of a large lake whose mud would eventually be transformed into soft calcite-bearing shale. D. kokuraensis (Uyeno 1979), D. primotinus (Uyeno 1979), and D. altiformis were dominant members of an Early Cretaceous lake fauna (the "Diplomystus-Wakinoichthys Fauna") in what is now Japan and Korea. Dimensions: 4.6 Inches Long & 3 Inches Wide (Plate) Fish is 4.2 Inches Long & 1.5 Inch Wide. Diplomystus Dentatus morphology, including its upturned mouth, is prototypic of a surface feeding fish. The genus is herrings that likely fed on small surface-dwelling fish as Knightia is evidenced by numerous fossils found with Knightia is the stomach or mouth. The unusual chemistry of fossil lake prevented decay and scavenging of dead organisms while millimeter-thick layers of alternating limestone matter slowly accumulated. The result is laminated limestones that contained the highest concentration of fossil fish in the world. These fish, other aquatic organisms, and associated geologic features make Fossil Lake the world's best Paleogene record of the freshwater lake ecosystem. Kingdom: Animalia Phylum: Chordata Class: Actinopterygii Order: Clupeiformes Family: †Ellimmichthyidae Genus: †Diplomystus Species: †dentatus -
From the album: MY FOSSIL Collection - Dpaul7
Phareodus encaustus fish fossil Green River Formation, Kemmerer Wyoming Eocene Age (56 Million Years ago) Phareodus is a genus of freshwater fish from the Eocene to the Oligocene of Australia, Europe and North America. This genus includes at least four species, P. testis (Leidy, 1873) and P. encaustus of North America, P. muelleri of Europe, and P. queenslandicus of Australia. Representatives have been found from the middle Eocene to the Oligocene of Australia, Europe and North America, including the Green River Formation in Wyoming, United States P. testis was a freshwater fish with an oval outline, a small head, and a slightly pointed snout. Its dorsal and anal fins were situated posteriorly, with the anal fin being larger. Its caudal fin was slightly forked. It had small pelvic fins but long, narrow pectoral finsPhareodus belongs to the osteoglossids, which are represented today by the Arawana. Arawana is found in tropical and semitropical fresh waters of South America, central Africa, Southeast Asia, and northern Australia. Phareodus lived during the Eocene Epoch and is about 55 million years old They can be found in the fine-grained limestone layers of the River Formation. Fifty million years ago ancient Fossil Lake existed in what is now southwest Wyoming. Of its estimated maximum extent of 930 square miles, approximately 500 square miles of sediment remain. The 230 square miles across the center of the ancient lake-bed contain exceptionally fossiliferous sediments and associated geologic features including deltas, beaches, springs, and rocks from the center and near shore environments. Kingdom: Animalia Phylum: Chordata Subphylum: Vertebrata Infraphylum: Gnathostomata Superclass: Osteichthyes Class: Actinopterygii Family: Osteoglossidae Genus: †Phareodus Species: †encaustus -
From the album: MY FOSSIL Collection - Dpaul7
Phareodus encaustus fish fossil Green River Formation, Kemmerer Wyoming Eocene Age (56 Million Years ago) Phareodus is a genus of freshwater fish from the Eocene to the Oligocene of Australia, Europe and North America. This genus includes at least four species, P. testis (Leidy, 1873) and P. encaustus of North America, P. muelleri of Europe, and P. queenslandicus of Australia. Representatives have been found from the middle Eocene to the Oligocene of Australia, Europe and North America, including the Green River Formation in Wyoming, United States P. testis was a freshwater fish with an oval outline, a small head, and a slightly pointed snout. Its dorsal and anal fins were situated posteriorly, with the anal fin being larger. Its caudal fin was slightly forked. It had small pelvic fins but long, narrow pectoral finsPhareodus belongs to the osteoglossids, which are represented today by the Arawana. Arawana is found in tropical and semitropical fresh waters of South America, central Africa, Southeast Asia, and northern Australia. Phareodus lived during the Eocene Epoch and is about 55 million years old They can be found in the fine-grained limestone layers of the River Formation. Fifty million years ago ancient Fossil Lake existed in what is now southwest Wyoming. Of its estimated maximum extent of 930 square miles, approximately 500 square miles of sediment remain. The 230 square miles across the center of the ancient lake-bed contain exceptionally fossiliferous sediments and associated geologic features including deltas, beaches, springs, and rocks from the center and near shore environments. Kingdom: Animalia Phylum: Chordata Subphylum: Vertebrata Infraphylum: Gnathostomata Superclass: Osteichthyes Class: Actinopterygii Family: Osteoglossidae Genus: †Phareodus Species: †encaustus -
From the album: MY FOSSIL Collection - Dpaul7
Phareodus encaustus fish fossil Green River Formation, Kemmerer Wyoming Eocene Age (56 Million Years ago) Phareodus is a genus of freshwater fish from the Eocene to the Oligocene of Australia, Europe and North America. This genus includes at least four species, P. testis (Leidy, 1873) and P. encaustus of North America, P. muelleri of Europe, and P. queenslandicus of Australia. Representatives have been found from the middle Eocene to the Oligocene of Australia, Europe and North America, including the Green River Formation in Wyoming, United States P. testis was a freshwater fish with an oval outline, a small head, and a slightly pointed snout. Its dorsal and anal fins were situated posteriorly, with the anal fin being larger. Its caudal fin was slightly forked. It had small pelvic fins but long, narrow pectoral finsPhareodus belongs to the osteoglossids, which are represented today by the Arawana. Arawana is found in tropical and semitropical fresh waters of South America, central Africa, Southeast Asia, and northern Australia. Phareodus lived during the Eocene Epoch and is about 55 million years old They can be found in the fine-grained limestone layers of the River Formation. Fifty million years ago ancient Fossil Lake existed in what is now southwest Wyoming. Of its estimated maximum extent of 930 square miles, approximately 500 square miles of sediment remain. The 230 square miles across the center of the ancient lake-bed contain exceptionally fossiliferous sediments and associated geologic features including deltas, beaches, springs, and rocks from the center and near shore environments. Kingdom: Animalia Phylum: Chordata Subphylum: Vertebrata Infraphylum: Gnathostomata Superclass: Osteichthyes Class: Actinopterygii Family: Osteoglossidae Genus: †Phareodus Species: †encaustus -
Any idea what these raptor teeth are, or if they're even are raptor teeth? Allegedly there from Lance formation, Wyoming. Definitely not in the best condition, but hey, any fossil is a good fossil.
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A friend wanted to see if you guys could ID this vertebra he found from the hills of Wyoming. He sees a lot of Moose nearby. Thanks!
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Mysterious Origin of Nebraska's "Devil's Corkscrew" Fossils
Oxytropidoceras posted a topic in Fossil News
The Mysterious Origin of Nebraska's "Devil's Corkscrew" Fossils Mental Floss Feb 1, 2018 http://mentalfloss.com/article/527706/mysterious-origin-nebraskas-devils-corkscrew-fossils Some papers are: Martin, L.D. and Bennett, D.K., 1977. The burrows of the Miocene beaver Palaeocastor, western Nebraska, USA. Palaeogeography, Palaeoclimatology, Palaeoecology, 22(3), pp. 173-193. Meyer, R.C., 1999. Helical burrows as a palaeoclimate response: Daimonelix by Palaeocastor. Palaeogeography, Palaeoclimatology, Palaeoecology, 147(3-4), pp. 291-298. Smith, R.M., 1987. Helical burrow casts of therapsid origin from the Beaufort Group (Permian) of South Africa. Palaeogeography, Palaeoclimatology, Palaeoecology, 60, pp. 155-169. Doody, J.S., James, H., Colyvas, K., Mchenry, C.R. and Clulow, S., 2015. Deep nesting in a lizard, déjà vu devil's corkscrews: first helical reptile burrow and deepest vertebrate nest. Biological Journal of the Linnean Society, 116(1), pp. 13-26. https://www.academia.edu/20873080/Deep_nesting_in_a_lizard_déjà_vu_devils_corkscrews_first_helical_reptile_burrow_and_deepest_vertebrate_nest https://www.researchgate.net/publication/280559331_Deep_Nesting_in_a_Lizard_Deja_Vu_Devil's_Corkscrews_First_Helical_Reptile_Burrow_and_Deepest_Vertebrate_Nest https://www.researchgate.net/profile/Simon_Clulow/publication/280940311_Deep_nesting_in_a_lizard_deja_vu_devil's_corkscrews_First_helical_reptile_burrow_and_deepest_vertebrate_nest/links/5a0ad68c0f7e9b0cc02355d0/Deep-nesting-in-a-lizard-deja-vu-devils-corkscrews-First-helical-reptile-burrow-and-deepest-vertebrate-nest.pdf Yours, Paul H.- 2 replies
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Hello! I have been living in Wyoming for over 20 years. I collect a lot of fossils and mineral in the America West. Looking forward to sharing my experiences! Thank you in advance for your warm welcomes!
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Fossil News about Fossil News! (Winter 17 - Fossil Basin)
Wendell Ricketts posted a topic in Fossil News
The Winter 2017 issue of Fossil News is a special focus on Kemmerer, WY — the Gateway to PaleoTourism, USA — the Fossil Basin area; the Fossil Butte Nat’l Monument; Dig-Your-Own quarries; and much more. There was so much great content that we added four additional pages to the issue! · In the Beginning: An Excerpt from Lance Grande’s The Lost World of Fossil Lake · A Photo Gallery of Specimens from the Extraordinary Collections at Fossil Butte · Kemmerer Area directories: Rock & Fossil Shops, Dig-Your-Own Quarries, and more · A Visit to the Westmoreland-Kemmerer Coal Mine · Discovering & Photographing Ostracods in Eocene Green River “Turritella Agate” · American Fossil: The “Education Quarry” · A Monitor Lizard from Green River The Find of a Lifetime · SVP to Sue to Block Reductions to Grand Staircase & Bears Ears National Monuments · and more! Get your copy or subscribe: tinyurl.com/fnsubscribe. From now until the end of the 2018 Tucson shows, mention that you saw this notice on Fossil Forum and get the trade rate of $44/year (instead of $50).
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From the album: MY FOSSIL Collection - Dpaul7
Diplomystus Dentatus Fish Fossil GREEN RIVER formation, Kemmerer, Wyoming USA Eocene age (56 Million years ago) Diplomystus is an extinct genus of freshwater clupeomorph fish distantly related to modern-day extant herrings, alewives, and sardines. The genus was first named and described by Edward Drinker Cope in 1877. There are seven species of Diplomystus: D. dentatus (Cope, 1877), D. birdii, D. dubetreiti, D. shengliensis (Chang 1983), D. kokuraensis (Uyeno 1979), D. primotinus (Uyeno 1979), and D. altiformis. D. dentatus (Cope, 1877) is well known from lower Eocene deposits from the Green River Formation in Wyoming. Specimens range from larval size to 65 cm and are commonly found in close association with the extinct herring Knightia sp. The Green River Formation is the remnant of a large lake whose mud would eventually be transformed into soft calcite-bearing shale. D. kokuraensis (Uyeno 1979), D. primotinus (Uyeno 1979), and D. altiformis were dominant members of an Early Cretaceous lake fauna (the "Diplomystus-Wakinoichthys Fauna") in what is now Japan and Korea. Dimensions: 4.6 Inches Long & 3 Inches Wide (Plate) Fish is 4.2 Inches Long & 1.5 Inch Wide. Diplomystus Dentatus morphology, including its upturned mouth, is prototypic of a surface feeding fish. The genus is herrings that likely fed on small surface-dwelling fish as Knightia is evidenced by numerous fossils found with Knightia is the stomach or mouth. The unusual chemistry of fossil lake prevented decay and scavenging of dead organisms while millimeter-thick layers of alternating limestone matter slowly accumulated. The result is laminated limestones that contained the highest concentration of fossil fish in the world. These fish, other aquatic organisms, and associated geologic features make Fossil Lake the world's best Paleogene record of the freshwater lake ecosystem. Kingdom: Animalia Phylum: Chordata Class: Actinopterygii Order: Clupeiformes Family: †Ellimmichthyidae Genus: †Diplomystus Species: †dentatus -
So I was going through a box of old items when I came upon these. I found these items on the surface in Wyoming...about 10 miles south of Shell, Wyoming to be exact. As I recall there we more than several around and what caught my eye was the disk shape and that each seemed to have this pinkish X or cross in the center. They are roughly the size of half dollars....maybe a little larger. At first I thought they might be epiphysis disks like these But I'm don't think so because of the strange X or Cross at the center of each of the ones I found. I suppose they might be some unique mineral deposits but have found nothing similar online. Any help in IDing these would be greatly appreciated.
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I was wondering if anyone could help ID two strange parts of this partial Leptauchenia fossilised skeleton. I've been prepping the bones out of the matrix (which is only a 15%-20% skeleton), but the skull is incredibly complete with all teeth. I've put a photo showing the bones I've identified against a reconstruction by Sinclair in 1910, but there are two strange objects I can't ID. These are of a texture that look more like teeth (than bones) and even seems to have some enamel-type gloss. They are more "claw-shaped" however and the skull isn't missing any teeth which is why I'm confused. The high gloss, smooth finish is whats confusing me. Any help would be greatly appreciated.
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From the album: MY FOSSIL Collection - Dpaul7
Eohippus angustidens Tooth & Mesohippus Jaw SITE LOCATION: Eohippus: Wyoming; Mesohippus - Lust, Wyoming TIME PERIOD: Eohippus: Eocene period, (~ 50 Million years ago) Mesohippus: Oligocene (~30 million years ago) Data: Eohippus is an extinct genus of small equid ungulates. The only species is E. angustidens, which was long considered a species of Hyracotherium. Its remains have been identified in North America and date to the Early Eocene (Ypresian) stage. In 1876, Othniel C. Marsh described a skeleton as Eohippus validus, from the Greek (e?s, "dawn") and (hippos, "horse"), meaning "dawn horse". Its similarities with fossils described by Richard Owen were formally pointed out in a 1932 paper by Sir Clive Forster Cooper. E. validus was moved to the genus Hyracotherium, which had priority as the name for the genus, with Eohippus becoming a junior synonym of that genus. Hyracotherium was recently found to be a paraphyletic group of species, and the genus now includes only H. leporinum. E. validus was found to be identical to an earlier-named species, Hyracotherium angustidens (Cope, 1875), and the resulting binomial is thus Eohippus angustidens. Mesohippus (Greek: meso meaning "middle" and hippos meaning "horse") is an extinct genus of early horse. It lived some 30 to 40 million years ago from the Middle Eocene to the Early Oligocene. Like many fossil horses, Mesohippus was common in North America. Mesohippus had longer legs than its predecessor Eohippus and stood about 60 cm (6 hands) tall. It had also lost a toe and stood predominantly on its middle toe, although the other two were also used. Split taxonomy: Kingdom: Animalia/Animalia Phylum: Chordata/Chordata Class: Mammalia/Mammalia Order: Perissodactyla/Perissodactyla Family: Equidae/Equidae Genus: †Eohippus/†Mesohippus Species: †angustidens/sp. -
From the album: MY FOSSIL Collection - Dpaul7
Eohippus angustidens Tooth & Mesohippus Jaw SITE LOCATION: Eohippus: Wyoming; Mesohippus - Lust, Wyoming TIME PERIOD: Eohippus: Eocene period, (~ 50 Million years ago) Mesohippus: Oligocene (~30 million years ago) Data: Eohippus is an extinct genus of small equid ungulates. The only species is E. angustidens, which was long considered a species of Hyracotherium. Its remains have been identified in North America and date to the Early Eocene (Ypresian) stage. In 1876, Othniel C. Marsh described a skeleton as Eohippus validus, from the Greek (e?s, "dawn") and (hippos, "horse"), meaning "dawn horse". Its similarities with fossils described by Richard Owen were formally pointed out in a 1932 paper by Sir Clive Forster Cooper. E. validus was moved to the genus Hyracotherium, which had priority as the name for the genus, with Eohippus becoming a junior synonym of that genus. Hyracotherium was recently found to be a paraphyletic group of species, and the genus now includes only H. leporinum. E. validus was found to be identical to an earlier-named species, Hyracotherium angustidens (Cope, 1875), and the resulting binomial is thus Eohippus angustidens. Mesohippus (Greek: meso meaning "middle" and hippos meaning "horse") is an extinct genus of early horse. It lived some 30 to 40 million years ago from the Middle Eocene to the Early Oligocene. Like many fossil horses, Mesohippus was common in North America. Mesohippus had longer legs than its predecessor Eohippus and stood about 60 cm (6 hands) tall. It had also lost a toe and stood predominantly on its middle toe, although the other two were also used. Split taxonomy: Kingdom: Animalia/Animalia Phylum: Chordata/Chordata Class: Mammalia/Mammalia Order: Perissodactyla/Perissodactyla Family: Equidae/Equidae Genus: †Eohippus/†Mesohippus Species: †angustidens/sp. -
From the album: MY FOSSIL Collection - Dpaul7
Eohippus angustidens Tooth & Mesohippus Jaw SITE LOCATION: Eohippus: Wyoming; Mesohippus - Lust, Wyoming TIME PERIOD: Eohippus: Eocene period, (~ 50 Million years ago) Mesohippus: Oligocene (~30 million years ago) Data: Eohippus is an extinct genus of small equid ungulates. The only species is E. angustidens, which was long considered a species of Hyracotherium. Its remains have been identified in North America and date to the Early Eocene (Ypresian) stage. In 1876, Othniel C. Marsh described a skeleton as Eohippus validus, from the Greek (e?s, "dawn") and (hippos, "horse"), meaning "dawn horse". Its similarities with fossils described by Richard Owen were formally pointed out in a 1932 paper by Sir Clive Forster Cooper. E. validus was moved to the genus Hyracotherium, which had priority as the name for the genus, with Eohippus becoming a junior synonym of that genus. Hyracotherium was recently found to be a paraphyletic group of species, and the genus now includes only H. leporinum. E. validus was found to be identical to an earlier-named species, Hyracotherium angustidens (Cope, 1875), and the resulting binomial is thus Eohippus angustidens. Mesohippus (Greek: meso meaning "middle" and hippos meaning "horse") is an extinct genus of early horse. It lived some 30 to 40 million years ago from the Middle Eocene to the Early Oligocene. Like many fossil horses, Mesohippus was common in North America. Mesohippus had longer legs than its predecessor Eohippus and stood about 60 cm (6 hands) tall. It had also lost a toe and stood predominantly on its middle toe, although the other two were also used. Split taxonomy: Kingdom: Animalia/Animalia Phylum: Chordata/Chordata Class: Mammalia/Mammalia Order: Perissodactyla/Perissodactyla Family: Equidae/Equidae Genus: †Eohippus/†Mesohippus Species: †angustidens/sp.
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