Posts Tagged ‘Million Years’
Sunday, March 18th, 2012
No student of the history life on earth will deny that the coming of the reptiles was one of the great events. As the first truly terrestrial vertebrates, the early reptiles not only filled out the faunal picture for their own time in arresting ways, but they also set the stage for later dramatic happenings like the rise of the dinosaurs, the beginnings of birds and the age-long evolution of the mammal line.
The reptiles went ashore during the Permian, more than 250 million years ago. There was growing opportunity in the Permian land, and by a surprising twist of history, the reptile ancestors had already evolved equipment to take advantage of the opportunity and become the first terrestrial pioneers. During the time of the coal forests, land vegetation had become well developed. Ferns, seed ferns and their kin covered the low-lying land, the energy of the sun was being caught by chlorophyll, insects had made their appearance and food was wasting on the shore. It was almost certainly the insects as a source of animal food that attracted the reptile ancestors living harassed lives at the rim of the land. If one had to work out this bit of paleontology by logic, one would probably do it this way: the insects were there, vertebrate life was under competitive and predatory pressure in the sea, so some of the shallow-water vertebrates, seeking food and refuge ashore, gradually acquired legs, lungs, scales and the shelled egg, and thus developed at last into land reptiles which were able to forage for insects in the forest.
Book Your Tour Of Chichen Itza from Cancun Today
http://uglogical.com/
Tags: Animal Food, Dinosaurs, Forage, Insects, Land Vegetation, Life On Earth, Logic One, Mammal, Million Years, Own Time, Paleontology, Permian Period, Reptile Ancestors, reptiles, Seed Ferns, Shallow Water, Shelled Egg, Terrestrial Vertebrates, Tour Of Chichen Itza, Vertebrate Life
Posted in Uncategorized | No Comments »
Tuesday, March 6th, 2012
Including the leptospondyles – from which the lines leading to modern caecilians and caudates (tailed amphibians) developed – and the labyrinthodonts – from which the line leading to modern anurans (frogs and toads) developed. (Many herpetologists today believe that frogs, caudates and caecilians share a common ancestor rather than evolving from two separate groups of early amphibians.)
A large gap in geological time separates the leptospondyles and labyrinthodonts from the modern salamanders and frogs. The first frog-like creatures appeared in the early Triassic period, about 225 million years ago. While frogs have evolved to take up a great many habitats on land, the salamanders have retained a great many superficially primitive amphibian characteristics and have in the main remained more dependent on a watery environment than have the anurans.
Book Your Tour Of Chichen Itza from Cancun Today
North End Winnipeg – McPhillips Ave Used Car Truck Dealer Manitoba
http://uglogical.com/
Tags: Anurans, Caecilians, Car Truck, Common Ancestor, Creatures, Frog, Frogs, Gap, Geological Time, Habitats, Herpetologists, Manitoba, Mcphillips, Million Years, Salamanders, Toads, Tour Of Chichen Itza, Triassic Period, Watery Environment, Winnipeg
Posted in Uncategorized | No Comments »
Monday, February 27th, 2012
The Devonian period, some 350 million years ago, some of the crossopterygian fishes came out onto the land. It is very likely that these fishes were of a type represented by the genus Eustenopteron. In evolutionary terms, this was one of the boldest steps in history: a venturing of early vertebrates into a completely new environment to which they were only partially adapted. Once this step had been made, however, it was not long before these advanced, air-breathing fishes became transformed into primitive Amphibia.
From available fossil evidence it has been calculated that the earliest amphibians belonged to a group known as chthyostegids, creatures that had characteristics of both the crossopterygian fishes and the later, more advanced amphibians. A typical chthyostegid, a member of the genus Ichthyostega, had a skull about 15 cm (6 in) in lenght. Although similar in many respects to the skull of crossoptergian fish ancestor, there were certain important changes between that of the fish and that of the amphibian. In the fish, for example, the part of the skull in front of the eyes was comparatively short, while the portion behind the eyes was comparatively long. In Ichthyostega a paradoxical situation prevailed in which the portion of the skull behind the eyes was relatively shorter than that of the fishes and the portion in front relatively longer. In amphibians, the eyes tended to be oriented more toward the top of the skull than in the fishes. Although Ichthyostega had developed strong pectoral and pelvic girdles that carried completely developed limbs and feet, the fin rays of the fish tail were retained! From this early fish/amphibian we can follow the evolution of the later amphibians as they radiated into different lines.
In changing from a totally aquatic experience to a new terrestrial life, various problems had to be resolved. While a fish normally obtains its oxygen from water by means of gills, the early amphibians had to further develop and perfect the lungs that they had inherited from their crossopterygian ancestors, although in the larval stage (as is still the case with modern amphibians) they continued to respire by means of gills. Another problem that land-dwelling animals had to deal with was the possibility of desiccation or drying up.
Cancun Booking Tour Chichen Itza
North End Winnipeg – McPhillips Ave Used Car Truck Dealer Manitoba
http://uglogical.com/
Tags: Air Breathing, Amphibia, Amphibian, Amphibians, Ancestor, Aquatic Experience, Creatures, Devonian Period, Evolutionary Terms, Fin Rays, Fish, Fish Tail, Fishes, Fossil Evidence, Genus, Million Years, Paradoxical Situation, Pelvic Girdles, Respects, Skull, Terrestrial Life, Vertebrates
Posted in Uncategorized | No Comments »
Friday, January 21st, 2011
After 70 million years of terrestrial life, some reptiles returned to the sea. One group, the sauropterygians shown on these pages, retained many reptilian characteristics, although their bodies became more streamlined. All the sauropterygians developed hard rib “baskets” to support their abdomens and protect their vulnerable undersides from attack.
Prominent among the sauropterygians was an important group called plesiosaurs. One of these was Kronosaurus, a fast-diving predator with huge, fish-trapping jaws. Another was Cryptocleidus, which used its long, flexible neck for plucking victims from passing schools of fish. Placodus, was not a plesiosaur; it was a leisurely bottom feeder that ground crustaceans to bits with its mouthful of flat, crushing platelike teeth.
http://uglogical.com/
Long Stay Hotel Winnipeg
Eagle Ridge GM Mobi
Related Websites - Frederick S. Haines Commemorative Exhibition The Frederick S. Haines Commemorative Exhibition Meaford, Ontario September 10 – 30, 2010 Frederick Stanley Haines: A Good Life Lived, an Enduring Legacy Left Frederick Stanley Haines, born in Meaford, March 29, 1879, died November...
- Florence Lake Florence Lake Florence Lake is located near: Clovis, CA Phone: 1-877-444-6777 About the Lake: Florence Lake was built in the early 1900's as part of a hydroelectric project. Nearby Huntington Lake was also constructed...
- Catching A Fish - It Requires Patience The aquarist could own a fish only or reef aquarium, whichever it is there is one action that is very low in popularity - catching a fish. The natural reaction of a fish when anything...
- Good Bottom Fishing is Still Available Some bottom-feeding fish fishermen were afraid that until the liberal blackfish season opened, there will be little to fish for, but this fear has been proven to be without grounds, as after an excellent weekend...
- Free Wordpress Theme Deep Sea Fishing Don't like this free theme? Click Here to see free fishing theme. I've been creating some Wordpress Themes and I'm giving them away. Yep more Free Wordpress Themes. You can find more Free Wordpress Themes...
- Fishing the Big One in Lake Tahoe Lake Tahoe offers plenty of exceptional scenery making it worth the fishing trip price just to see the dawn as it tints the Sierras in lovely gold. Fishing is not very productive here since the...
Tags: Abdomens, Bottom Feeder, Crustaceans, Eagle Ridge Gm, Fish, Flexible Neck, Gm, Jaws, Million Years, Mobi, Mouthful, Placodus, Plesiosaur, Plesiosaurs, Predator, reptiles, Rib Baskets, Sauropterygians, Teeth, Terrestrial Life, Winnipeg
Posted in Uncategorized | No Comments »
Wednesday, January 5th, 2011
Clumsy object that it is, the shell has helped ensure the survival of the turtles for 175 million years. Today it is still worn by all species, although it has been modified to suit a variety of environments. Sea turtles, for example, have jettisoned much of their shell bone and are among the fastest-moving of modern reptiles. Land turtles have thinned theirs down to make tiptoe locomotion on their elephantine feet less ponderous. Soft-shelled turtles, which live in fresh water, have developed pancake-shaped shells with flexible edges which they use to help bury themselves. Lying hidden in shallow water, waiting for prey, they occasionally crane their long necks to breathe air with their snorkel-like nostrils.
http://uglogical.com/
Winnipeg Long Stay Mainstay Hotels
Eagle Ridge GM MOBI Smartphone
Related Websites
- Acoustic Guitar Accessories Regardless of whatever type of acoustic guitar you end up getting, the accessories that you choose are going to play a vital role in protecting the investment that you make. As you read through this...
- Feeding a Deep Sand Bed In the salt water aquarium a [tag-tec]deep sand bed[/tag-tec] (DSB) is a very positive addition to the system. In addition to its filtration capabilities, it is interesting in its own right. Why so interesting? This...
- Keeping Dry on the Slopes pt 2 One of the biggest complaints that exist among new skiers is that they end up getting cold, and they end up getting wet. Keeping yourself dry is a good way to keep your self warm....
- Taco Stuffed Shells Recipe I love stuffed shells. I don’t make them very often because they are quite a bit of work. If you like tacos you will love this taco stuffed shells recipe. Be careful not to...
- Equipment for the Duck Hunt The duck hunt is something that you must plan for and something that's very hard to do spontaneously. That's because there is a certain amount of equipment that you need to do a proper hunt....
Tags: Eagle Ridge Gm, Environments, Fresh Water, Gm, Land Turtles, Long Necks, Long Stay, Mainstay Hotels, Million Years, Mobi, Moving, Nostrils, Prey, reptiles, Sea Turtles, Shallow Water, Shell, Shells, Smartphone, Snorkel, Soft Shelled Turtles, Survival, Turtles, Winnipeg
Posted in Uncategorized | No Comments »
Sunday, December 12th, 2010
Emerging from streams and ponds some 365 million years ago, the reptile ancestors established a beachhead during the Upper Devonian and eventually gave rise to myriad bizarre creatures, from gopher-sized cotylosaurs to the schooner-sized Brontosaurus. While many returned to the water, a few took to the air. But most remained on land to dominate the earth for some 200 million years.
http://uglogical.com/
Mazda Edmonton
Edmonton Alberta Auto Dealer
Winnipeg Long Stay Hotel
Related Websites - Would You Turn Down 12 Million Dollars? It's pretty easy to turn down money when it means you have to work for it. It's called being lazy and we all do it. We have the ability to work hard and get paid,...
- Egypt -- Investing in the Land of the Pharaohs Egypt evokes images of the Great Pyramid at Giza , the Nile River and the vast expanse of the Sinai Peninsula. Egypt's population of 83 million also makes it the Arab world’s most populous country....
- Chegg.com Rent Textbooks: Fast Delivery, Free Return Shipping! Chegg.com is the hottest online textbook rental service sweeping the nation that's helping students save $500 or more a year on textbooks. Chegg has 1 million customers and...
- Trees, part 6 Skyscrapers of nature: 'Wild Trees' I wasn't surprised today when I found, while looking at something else, an email I had saved that linked me to this book and article. The Wild Trees: A Story of Passion and Daring sounds...
- Too Rich To Save? According to a study by HSBC, 49% of respondents with at least $250,000 in income aren't saving more because they simply "want some spending money." In 28% of the cases for those who earn between...
- 2 New Loans (Part 2/2) — Debt Consolidation — $20,000 at 18.00% — C Credit — DTI 23% A new loan funded this afternoon (Debt Consolidation (Loan #6419) â $20,000 at 18.00%). I participated via my standing order: Mid DTI -- AF. Which is this loan was funded as a medium debt to...
Tags: Auto Dealer, Beachhead, Bizarre Creatures, Brontosaurus, Earth, Edmonton Alberta, Edmonton Edmonton, Grandeur, Long Stay, Mazda, Million Years, Ponds, Reptile Ancestors, Schooner, Streams, Upper Devonian, Winnipeg
Posted in Uncategorized | No Comments »
Saturday, December 12th, 2009
The inturned head of the femur (the beginnings of the full right-angled femur head seen in dinosaurs and in a different from in mammals); the straight knee joint; the reduced hinge-like ankle joint (technically termed the advanced mesotarsal, or AM, ankle); the long toes and the digitigrade posture of the foot, in which only the toes touch the ground, not the sole of the foot as in earlier archosaurs – and in humans today.
Most of the dinosaur-like characters are also seen in the flying pterosaurs. Certain paleontologists argue that Lagosuchus, the pterosaurs, and the dinosaurs together form a major clade that arose in the Middle to Late Triassic, some 230 million years ago.
The dinosaur-like synapomorphies of this clade, and their further modification in the dinosaurs proper, are part of a major series of related anatomical changes that took place among the archosaurs during the Triassic, and which may have been the key to the origin of the dinosaurs.
Uglogical
http://uglogical.com/
Winnipeg Auto Financing
Related Websites - Dinosaur Bedding for Tough Kids Bedding for kids can have a hard life and not last very long with all of the abuse and other things that happen to it. If you are looking to replace bedding than a good...
- Ruptured Peroneus Longus Tendon So as I mentioned in my weigh in post, on Tuesday I was playing volleyball at the local community center.... It was a 3 on 3 game and we were receiving. My teammate passed the ball...
- How to Become a Serious Coin Collector There are two different types of coin collectors in this world: those who are serious about their collecting, and those who collect for simple enjoyment. While serious collectors do get enjoyment out of coin collecting,...
Tags: Anatomical Changes, Ankle Joint, Archosaurs, Auto Financing, Clade, Dinosaur, Dinosaurs, Femur Head, Hinge, Knee Joint, Long Toes, Mammals, Million Years, Paleontologists, Posture, Pterosaurs, Sole, Synapomorphies, Winnipeg
Posted in Uncategorized | No Comments »
Saturday, December 5th, 2009
The evolutionary tree of dinosaurs contains a great deal of information. The horizontal axis represents time, and the vertical axis represents dinosaurian diversity. All the major families of dinosaurs are indicated with horizontal lines that record their known distribution in time, as based upon present fossil evidence. Future finds of dinosaur skeletons may extend the time ranges backwards or forwards in time.
There are two “fixed” time lines that do not seem to be breached, however. The dinosaurs arose from a single ancestor some 230 million years ago, in the Middle to Late Triassic, and it is unlikely that older dinosaur skeletons will be found. The second “fixed” time line corresponds to the extinction of the last dinosaurs 66 million years ago. Despite strenuous efforts to find post-Mesozoic dinosaur specimens, and many reports of supposed discoveries, no such remains have withstood close scrutiny. Most usually, post-mesozoic dinosaur bones have been reworked, that is, removed from the rock by natural erosion and redeposited in a younger sediment.
The most important aspect of this phylogenetic tree is the representation of the relationships between the different families. This is based on recent cladistic anlyses, carried out by a number of North American and European vertebrae paleontologists after 1985, and the pattern shown here is quite revolutionary in the sense that it is dramatically different from anything in popular books of this sort. It is also important because it shows a much higher degree of resolution than the earlier phylogenies; that is, the pattern of relationships is shown in a much more detailed way than was possible before.
Uglogical
http://uglogical.com/
Winnipeg Auto Financing
Related Websites - Most Americans Feel the Same About Job Security as They Did a Year Ago. (infographic) As you can see in this infographic, the majority of Americans polled feel as secure (or insecure) about their employment as they did a year ago. This shouldn't really surprise anyone since the unemployment level...
- 2009 Offense Preview What To Know: With Harvin and Murphy gone, the offense is going to be missing their sure thing stars for receiving, but there is plenty of speed to be burned at running back and so...
- Antique Bird Cages Dealers -> Antiques -> Decorative-Arts Years ago, before the introduction of plastics and resins, even animals’ indoor homes like antique bird cages were considered beautiful pieces of furniture. Of course, some were plain and utilitarian,...
- Resisting Panic: A Quick Guide to Surviving The Credit Crunch A few years ago if you referenced the term "credit crunch", most people would be puzzled. Today barely a single day can pass without the phrase seeing consistent if not constant use in the newspapers...
- Russian Coins Coins & Paper Money -> Coins: World -> Russia Russian coins have recently become a popular investment, with many of the popular dealers selling out of supplies, and some older and more rare coins earning...
- Feeling it... I really need to start working out earlier in the day that way I can do my night session with out being so tired. It all started when I went out for that run last...
Tags: Cladistic, Dinosaur Bones, Dinosaur Skeletons, Dinosaur Specimens, Dinosaurs, Evolutionary Tree, Fossil Evidence, Higher Degree, Horizontal Axis, Horizontal Lines, Million Years, Natural Erosion, Phylogenetic Tree, Phylogenies, Popular Books, Strenuous Efforts, Time Lines, Triassic, Vertebrae, Vertical Axis
Posted in Uncategorized | No Comments »
Tuesday, October 13th, 2009
The origin of the turtle’s shell has not been convincingly explained to any length or depth. A small reptile now named Eunotosaurus that lived approximately 250 million years ago in the “Permian” age has often been stated and referred to as a probable turtle or turtle based ancestor. It had ribs which were broadened in such a way that suggests it played the role of a rudimentary “shell”. But whatever the beginnings of turtles may have been – then the shell itself is now the mark of the turtle clan.
In spite of the millions of years of evolution that have seen turtles established nearly everywhere on the earth except for the air , with “flying turtles”. the shell itself has been retained and is the most recognizable form and indeed trademark of this group and grouping of type of animals.
Oldest Turtle Found; May Crack Shell-Evolution Mystery – Care2 … – Fossils of the oldest known turtles, unearthed in southwestern China, may help answer an evolutionary enigma—how did the turtle get its shell?
How the Turtle got It’s Shell… « Nirvana Peace – Xiao-chun Wu, a palaeontologist at the Canadian Museum of Nature in Ottawa and a member of the research team, said: “Since the 1800s, there have been many hypotheses about the origin of the turtle shell. Now we have these fossils of the …
NeuroLogica Blog » Turtle on the Half-Shell – The turtle shell is a dramatic evolutionary adaption, and yet it appeared fully formed in the fossil record, so paleontologists could only speculate about its origins. A report is about to be published in the journal Nature by authors …
Evolution of Turtle Shell: The Mystery Gets Cracked Open by Scientists – Uncovered in south west China last year, Odontochelys semistestacea seems to be the oldest known turtle fossil – believed to date 220 million years back. More.
A Clue to the Evolutionary Riddle of How the Turtle Got Its Shell … – Says researcher Xiao-chun Wu: “Since the 1800s, there have been many hypotheses about the origin of the turtle shell. Now we have these fossils of the earliest known turtle. They support the theory that the shell would have formed from …
Uglogical
http://blog.keylargobill.com/
Winnipeg Manitoba Used Truck Auto Finance Calculator
www.uglogical.com
Related Websites - I Love It When You Talk Retro Not long ago, I used the expression "sounds like a broken record" regarding a classmate of my 10 yr old. He had been repeating the same issue over and over in class, and that simile...
- When Is The Time Right To Refinance? Deciding whether to refinance a home is a big decision that could have significant effects on the household finances for many years to come. Refinancing at the right time can save the homeowner a large...
- What are the origins of Dispensationalism? What are the origins of Dispensationalism: Some Dispensationalist try to make the assertion the apostles were Dispensationalist. Therefore, the origins of Dispensationalism can be found in the early Church. However, this is a presumptuous statement....
- Introduction to the Koto A Koto is a stringed instrument that originally came from China and then moved into Japan during the 7th and 8th centuries. The Japanese Koto appears as a large instrument that is approximately 6 feet...
- Take care of your skin today, it will thank you in 10 years Take care of your skin today, it will thank you in 10 years. Or sooner! I will be posting individual reviews in each category, but they are not ready to go up. This is a...
- Facebook CFO Gideon Yu resigns Facebook's finance chief, Gideon Yu, is leaving the fast-growing social-networking site as the company looks for a replacement with "public company experience." It's the latest sign that the site may be looking to go public...
Tags: Adaption, Ancestor, Animals, Auto Finance Calculator, Canadian Museum Of Nature, Earth, Evolution, Evolutionary Riddle, Flying Turtles, Fossil Record, Fossils, Half Shell, Hypotheses, Journal Nature, Million Years, Museum Of Nature, Museum Of Nature In Ottawa, Palaeontologist, Permian Age, Reptile, Ribs, South West China, Southwestern China, Spite, Trademark, Turle, Turtle, Turtle Clan, Turtle Shell, Turtles, Winnipeg, Xiao Chun
Posted in Uncategorized | No Comments »