Ichthyosaurs-The Dolphins of the Mesozoic

1 - I can do better 2 - Jury's out 3 - Pretty darn good 4 - Splendiferous 5 - Awesometastic by 0 people | Log in to rate

Ranked #3,146 in Animals, #59,314 overall

What are Ichthyosaurs?

Ichthyosaurs were marine reptiles that lived during the Mesozoic era. Similar to modern whales and dolphins, ichthyosaurs (ick-thee-o-soars) or fish-lizards, lived on land, but returned to the water a little before the dinosaurs lived-probably around 250 million years ago. There, their legs evolved into flipper-shapes and their tail became more like a fish's. In the seas, they filled a similar niche as the modern day dolphins and whales. Ichthyosaurs came in various sizes and versions, from the size of porpoises to enormous whale-like sizes as the Shonisaurus version on the right shows. Although the ichthyosaurs flourished for quite a long time, they went extinct around 90 million years ago, possibly due to getting out competed another marine predator, the plesiosaurs. Ichthyosaurs were interesting creatures and left intriguing fossils.

What caused the ichthyosaurs to go back to the sea, caused them to flourish for so long, and what caused them to die out, are all still mysteries, but what we do know is fascinating none the less.

Smithsonian Ichthyosaur 

In the National Museum of Natural History: Hall of Fossils

Picture via Creative Commons from Ryan Somma

What Are Ichthyosaurs? 

Ichthyosaurs (Greek for "fish lizard" - ?????/ichthys meaning "fish" and ??????/sauros meaning "lizard") were giant marine reptiles that resembled fish and dolphins. Ichthyosaurs thrived during much of the Mesozoic era; based on fossil evidence, they first appeared approximately 245 million years ago (mya) and disappeared about 90 million years ago, about 25 million years before the dinosaurs became extinct. During the middle Triassic Period, ichthyosaurs evolved from as-yet unidentified land reptiles that moved back into the water, in a development parallel to that of the ancestors of modern-day dolphins and whales. They were particularly abundant in the Jurassic Period, until they were replaced as the top aquatic predators by plesiosaurs in the Cretaceous Period. They belong to the order known as Ichthyosauria or Ichthyopterygia ('fish flippers' - a designation introduced by Sir Richard Owen in 1840, although the term is now used more for the parent clade of the Ichthyosauria).

An Ichthyosaur Smile 

Picture via Creative Commons from Kevan

Installing an Ichthyosaur in a Museum 

Ichthyosaur Fossil Installation - Jan. 2008

The Burke Museum installs a 125 million year old "fish lizard" fossil.

Runtime: 62
1338 views
5 Comments:

curated content from YouTube

Pregnant Ichthyosaur Fossil 

This fossilized ichthyosaur was pregnant at the time of her death.

Dr. Robert Bakker - Ichthyosaur fossil

This amazing ichthyosaur fossil discovered in Germany and pregnant with as many as seven embryos can be seen at the entrance to the Leonardo exhibit at the Houston Museum of Natural Science.

Runtime: 69
1079 views
3 Comments:

curated content from YouTube

An Ichthyosaur Specimen 

Picture via Creative Commons from Ryan Somma

Blogs Mentioning Ichthyosaurs 

Classically reptillian traits of ichthyosaur - Talk Rational!
Classically reptillian traits of ichthyosaur Evolution and Origins.
A Plesiosaur That Ate Ichthyosaurs for Lunch | Dinosaur Tracking
among the preserved stomach contents of the partially-complete plesiosaur skeleton there were a series of small, ring-shaped bones.
Ichthyosaur! on Flickr - Photo Sharing!
Ichthyosaur! Ichthyosaur! by LadyCrafthole. View On Black. To take full advantage of Flickr, you should use a JavaScript-enabled browser and install the latest version of the Macromedia Flash Player. ...

Sea Monsters 3D: A Prehistoric Adventure 

by pacsci

The trailer for Sea Monsters 3D, an National Geographic movie about prehistoric marine reptiles. This movie follows a fossil discovered in Kansas and goes back in time to when that animal lived and tells her story. It really shows what the prehistoric seas would have been like though it is predominately about plesiosaurs and mosasaurs.

Check out the link below for purchasing information or check with your local IMAX theater to see if they're going to play it again. It's a bit short, but very intense and interesting.
powered by Youtube

Sea Monsters 

Sea Monsters: A Prehistoric Adventure (National Geographic) [Blu-ray]

Amazon Price: $17.99 (as of 01/07/2010)Buy Now

The movie in its entirety from which the trailer above was taken. It is really very attractively done and fairly accurate. Perhaps a bit scary for kids below seven or so since everyone wants to eat everyone else in the movie, but it really captures the imagination of older kids and even adults.

Berlin-Ichtyosaur State Park 

In Central Nevada

Berlin Ichthyosaur State Park is composed of two parks in one. One section, the old mining town of Berlin is historic and a great way to view some of human history. The ichthyosaur section is a Registered Natural Landmark, and where one of the biggest ichthyosaur discoveries was ever made.

No one is quite sure of the entire story, it's difficult to discern clues from ages-old fossils, but the story of what might have happened to cause the ichthyosaurs to be at Berlin-Ichthyosaur State Park is:

Millions and millions of years ago, the west coast of what is now the United States was not where it is today. It was in the middle of Nevada, so the sea lapped over all of what is now California, and quite a bit of Nevada. These seas were rich in life, much as our seas are today. There were fish and predators and lots of small creatures. One of the predators of the time was the ichthyosaur, filling the niche that is now occupied by the whales and dolphins. They cruised the seas, looking for food, and possibly migrating as whales do today. There was a group of composed of 37 individuals of the largest type of ichthyosaur known to us, the Shonisaurus popularis. They came into the sea above what is now Nevada, why we don't know. Could they have been following food? Coming in the birth their young? On a migration route? We don't know, but for some reason, they were there.

This group of Shonisaurus came to a sudden demise though. All of a sudden, they died and were buried, likely by an underwater landslide dropping tons of dirt upon them in a rapid burial of a massive degree. The Shonisaurus bodies buried under the pile were all overlapped, one carcass lying atop another. As time passed, more dirt built up over top of the Shonisaurus, and their bodies were fossilized. Millions of years later, the seas receded, the land rose, mountains formed, and eventually the coast came to be where it is now. Somewhere along the line, the burial location of the Shonisaurus was became home to numerous small faults and the covering landscape started to be eroded away.

In 1928, Dr. Siemon Muller, discovered, in an exposed portion, the first fossils of what we now call Shonisaurus popularis. Berlin-Ichthyosaur State Park is quite in the boonies today, imagine it over eighty years ago. Excavations finally commenced in 1954 with Dr. Charles Camp directing them. Over 40 ichthyosaurs have been discovered in the area since.

For more information about Shonisaurus popularis at Berlin-Ichthyosaur State Park, check out this site: The Oceans of Kansas

Visiting Berlin-Ichthyosaur Park 

If you want to visit the Berlin-Ichthyosaur State Park you want to plan ahead. It is located pretty much in the middle of nowhere, and while it is open year-around, extreme winter weather can prohibit travel. It is Nevada, so it can be dry and hot during the summer, though since the park is at 7,000' elevation, the temperature remains more moderate than most of Nevada, only reaching 90 degrees or so normally. Visiting the area in the fall or springtime is usually very nice and pleasant.

Many of the ichthyosaur fossils are housed on site, in situ, in the fossil house, tours are limited to the mid-spring, summer, and early-fall, so if you want to see the fossils, you have to come at the right time. The tour schedule varies, so contact the park to know when you should go, by calling (775) 964-2440. Also visiting Berlin-Ichthyosaur State Park website will give you more information.

Location of Berlin-Ichthyosaur State Park 

In 1984, Shonisaurus popularis became the State Fossil of Nevada

Shonisaurus popularis Painting 

Berlin-Ichthyosaur State Park

A life-sized painting done of Shonisaurus popularis, the type of ichthyosaur found at the Berlin-Ichthyosaur State Park in Nevada.

Picture via Creative Commons from Me

Shonisaurus popularis 

Shonisaurus is the largest ichthyosaur and marine reptile that has yet been found.Hilton, Richard P., Dinosaurs and Other Mesozoic Animals of California, University of California Press, Berkeley 2003 ISBN 0-520-23315-8, at pages 90-91. Fossils of Shonisaurus were first found in a large deposit in Nevada in 1920. Thirty years later, they were excavated, uncovering the remains of 37 very large ichthyosaurs. These were named Shonisaurus, which means "Lizard from the Shoshone Mountains", after the formation where the fossils were found.

Shonisaurus lived during the Norian stage of the late Triassic period. The better known S. popularis species was around long, but a more recently discovered species, S. sikkanniensis, was longer still, at .

Shonisaurus had a long pointed mouth that contained teeth only at the front end. It had a whale-like body, and its flippers were much longer, and narrower than in other ichthyosaurs. All of these features suggest that Shonisaurus may be a relatively specialised offshoot of the main ichthyosaur evolutionary line.

Inside the Fossil House 

Berlin-Ichthyosaur State Park

Though it didn't show up well in this picture, the fossil bed at Berlin-Ichthyosaur State Park is full of ichthyosaurs. Somehow, ichthyosaur bodies were piled up in this spot, perhaps buried by an underwater landslide, and the area was then buried even more and the bodies were fossilized. It's almost like a puzzle now, trying to figure out which parts go to which ichthyosaurs, since they are all overlaying each other and then the area was faulted, so the pieces aren't always next to where the other parts are.

Picture via Creative Commons from Me

Ichthyosaur Skull 

Berlin-Ichthyosaur State Park

More ichthyosaur fossils inside the fossil house at Berlin-Ichthyosaur State Park.

Picture via Creative Commons from Me

Their Eyes

Ichthyosaurs are considered to have the biggest eyes ever known proportionally. Their eyes were enormous and even if we were the size of one of the ichthyosaurs our eyes wouldn't even be as big as their pupils.

Ichthyosaur 

Natural History Museum of London

Picture via Creative Commons from tigerhawkvok

Sea Monsters 2 - Nothosaurs and Cymbospondylus 

From Chased By Sea Monsters

The first sea creatures-the Nothosaurs, are not ichthyosaurs, but the second marine reptile is and is a variety of called Cymospondylus. Check out the link below for more information on purchasing the complete video this segment was taken from. It's really very interesting and even people not into science like watching this movie.
powered by Youtube

Chased By Sea Monsters 

Chased by Sea Monsters

Amazon Price: (as of 01/07/2010)Buy Now

This movie looks very real and seems like an actual wildlife documentary. It includes the segment shown above, as well as many more encounters with prehistoric marine creatures. I really love how realistic most of this movie looks. There are a few fakey moments, but overall the movie really gives one the impression of being in a prehistoric ocean with dangerous sea creatures all around.

An Ichthyosaur in the the Smithsonian 

Picture via Creative Commons from Ryan Somma

Ichthyosaurs 

Picture via Creative Commons from tigerhawkvok

Books About Ichthyosaurs 

Learn more about ichthyosaurs by reading one or all of these books.

Monster Fish: The Adventure of the Ichthyosaurs (Dinosaur World)

Amazon Price: (as of 01/07/2010) Buy Now

Ichthyosaurs

Amazon Price: (as of 01/07/2010) Buy Now

Ichthyosaurs (Exploring Dinosaurs & Prehistoric Creatures)

Amazon Price: $27.07 (as of 01/07/2010) Buy Now

Neptune's Ark: From Ichthyosaurs to Orcas

Amazon Price: $14.78 (as of 01/07/2010) Buy Now

Ichthyosaur at Boston Museum of Science 

This picture looks a lot like a dolphin doesn't it? If there wasn't a tag, you might actually think it was one, except there's something off. Though their bodies were really similar, dolphins and ichthyosaurs deviated on one important thing especially, their tails. Dolphins, like most mammals, have tails that move up-and-down and that are wide. Ichthyosaurs, like fish and reptiles, have tails that move side-to-side and that are tall. Ichthyosaurs lived in the same place and filled the same biological niche as dolphins though, so it makes sense that they would seem similar, they lived parallel lives.

Picture via Creative Commons from Pathfinder Linden

More Information on Ichthyosaurs 

Locomotion and Respiration in Marine Air-Breathing Vertebrates
An interesting scientific account of how marine vertebrates moved and breathed. The ichthyosaur section is about 2/3rds down.
The Ichthyosaur Page
An in depth, but easy to understand page about ichthyosaurs. This is a very good page.

Pictures Ichthyosaur 

Ichthyosaurs

I love these reptiles - they AREN'T DINOSAURS OR FISH! These breathe atmospheric air and give birth to live babies, which is unusual for reptiles, and unlikely in dinosaurs.

Runtime: 77
998 views
0 Comments:

curated content from YouTube

Bookmark Me 

Like this lens? Want to share it with your friends? Easily share it on Twitter, Digg, Facebook, and other sites here.

Add this to your lens »

Bookmark and Share

Like This Lens? 

If you liked this lens, please consider rating it using these stars, 5 stars is great, 1 star is bad (sorry, Squidoo members only, though it is free and easy to join ;-)

Add this to your lens »

What Do You Think of Ichthyosaurs? 

What do you think of this lens? Do you like ichthyosaurs too? Please leave a comment below and let me know you were here. Thanks! :)

submit

Information About Me 

Want to know more about me? Check out my biography and lensography for more information

More About Me 

Lensmaster AlishaV has been a member since December 13 2008, has rated 278 lenses, favorited 37, and has created 70 lenses from scratch. This member's top-ranked page is "Make Your Own Homemade Cat Toys". See all my lenses

Check out these great lenses...

lens image
Make Your Own Homemade Cat Toys
How often have you purchased toys for your cats, only to find out they refuse to play with them or abandon them within a short time? They choose instead to play with the box it came in or junk from around the house. It seems silly to pay so much for... view lens
lens image
Chickens as House Pets
Chickens make really great pets (What other animal makes you breakfast in the morning? lol) and are enjoying a huge surge in popularity as more and more people are getting tired of buying lackluster tasting eggs from chickens in factory farms. Due to... view lens
lens image
Mike the Headless Chicken
There once was a chicken named Mike, he seemed a normal chicken. He liked to scratch and roost, and do chicken-y things. Mike was a bit different from other chickens though, he was different because he didn't have a head. That's right, he was a headl... view lens
lens image
Gem-O-Rama Fun in Trona, California
Gem-O-Rama is an amazing crystal collecting experience held near Death Valley, California. For a small fee, geologists, rock hounds, and crystal lovers all get to collect rare and different minerals the second weekend in October every year. It is pos... view lens
lens image
Diatomaceous Earth
Diatomaceous Earth is a fine, silty, soil-like substance that is composed of fossilized sea creatures. It is also known as fossil flour, Celite, diatom remains, or DE. The sea creatures are diatoms, so they call the substance diatomaceous (di-a-tom-a... view lens

by AlishaV

Me...Let's see...I'm...well...I guess I'm not too imaginative since I can never fill these things out...I live in Reno, just moved here. About 1 unit... (more)

Explore related pages

Create a Lens!