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Latest Sarcopterygii Stories

New Fish Fossil Reveals How Fins May Have Become Hind Limbs
2014-01-14 06:11:22

[ Watch the video: Tiktaalik roseae fossils reveal evolution of hind limbs ] April Flowers for redOrbit.com - Your Universe Online The evolution of hind legs actually began as enhanced hind fins, according to the newly discovered, well-preserved pelvis and a partial pelvic fin from Tiktaalik roseae—a 375 million-year old transitional species between fish and the first legged animals. The findings, published in Proceedings of the National Academy of Sciences (PNAS), challenge the...

Genome Of The Coelacanth Sequenced
2013-04-18 05:26:08

April Flowers for redOrbit.com - Your Universe Online The genome of the coelacanth, a creature with an evolutionary history that is both enigmatic and illuminating, has been decoded by the Genome Center of the Broad Institute of MIT and Harvard, and analyzed by an international team of researchers. The findings of this study are published in the journal Nature. The coelacanth, a sea-cave dwelling, five-foot long fish with limb-like fins, was once thought to be extinct until a living...

Ancient Fossils Of Tough Fish Shed Light On Evolution Of Four-Footed Animals
2013-03-28 08:08:22

April Flowers for redOrbit.com - Your Universe Online Describing life in the Devonian period in what is now northern Canada, Dr. Ted Daeschler of Drexel University said, "We call it a 'fish-eat-fish world,' an ecosystem where you really needed to escape predation.” The famous fossil fish species Tiktaalik roseae lived in this environment 375 million years ago. Daeschler, associate professor at Drexel University in the Department of Biodiversity, Earth and Environmental Science,...

African Lungfish Research Hints At New Evolutionary Step
2011-12-13 13:44:14

Researchers have revealed that the African lungfish can use its thin pelvic limbs to propel itself forward. The team's discovery reshuffles the order of evolutionary events leading up to creatures being able to walk, and also suggests that fossil tracks long thought to be the work of early tetrapods could have been produced instead by lobe-finned ancestors of the lungfish. "In a number of these trackways, the animals alternate their limbs, which suggested that they must have been made...

Nearly All Vertebrates Descended From Ancestor With Sixth Sense
2011-10-12 04:49:05

A new study finds that sharks, paddlefishes and certain other aquatic vertebrates have a sixth sense: the ability to detect weak electrical fields in the water, and to use this information to detect prey, communicate and orient themselves. The study, which caps more than a quarter century of work, found that the vast majority of vertebrates — roughly 30,000 species of land animals (including humans) and a roughly equal number of ray-finned fishes — descended from a common...

2011-10-05 12:52:59

A study into the muscle development of several different fish has given insights into the genetic leap that set the scene for the evolution of hind legs in terrestrial animals. This innovation gave rise to the tetrapods–four-legged creatures, and our distant ancestors–that made the first small steps on land some 400 million years ago. A team of Australian scientists led by Professor Peter Currie, of the Australian Regenerative Medicine Institute at Monash University, and Dr...

Image 1 - Researchers Find New Species Of Ancient Predatory Fish
2011-09-12 11:14:53

  The Academy of Natural Sciences today announced the discovery of a new species of large predatory fish that prowled ancient North American waterways during the Devonian Period, before backboned animals existed on land. Drs. Edward "Ted" Daeschler and Jason Downs of the Academy and colleagues from the University of Chicago and Harvard University describe the new denizen of the Devonian they named Laccognathus embryi in the current issue of the Journal of Vertebrate Paleontology....

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2010-05-18 07:23:07

Event of unknown origin occurred as first vertebrates tested land A mass extinction of fish 360 million years ago hit the reset button on Earth's life, setting the stage for modern vertebrate biodiversity. The mass extinction scrambled the species pool near the time at which the first vertebrates crawled from water towards land. Those few species that survived the bottleneck were the evolutionary starting point for all vertebrates--including humans--that exist today, according to results of a...

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2010-01-07 06:50:00

Fossilized footprints of a mysterious, long-extinct creature in a Polish quarry have caused paleontologists to reconsider traditional thinking of how sea-based vertebrates moved to land. Until now, scientists have thought they understood the evolutionary transition from fin to foot fairly well. One of the key theories in evolutionary biology is that tetrapods, four-legged animals with a spine, came from fish that had pairs of lobed fins. Fish called elpistostegids were the intermediate stage...

2007-01-02 03:00:26

By Friedman, Matt; Blom, Henning ABSTRACT- A new actinopterygian, Cuneognathus gardineri new genus and species, is described from the Devonian (Famennian) Obrutschew Bjerg Formation of East Greenland on the basis of multiple incomplete specimens. Cuneognathus most closely resembles Limnomis from the Famennian Catskill Formation of Pennsylvania, and, like that taxon, is known exclusively from freshwater deposits. A cladistic analysis with an ingroup of 13 actinopterygians and an outgroup...


Latest Sarcopterygii Reference Libraries

West African Lungfish, Protopterus Annectens
2012-12-25 12:16:41

West African Lungfish thrive in fresh water in the West African countries of Senegal, Niger, Gambia, Volta and Chad basins, where the water temp ranges from 77 to 86 degrees. They also can be found in tributaries of the Chari River in Western Sudan. It is eel-like in looks with a long slender body containing 34 - 37 pairs of ribs. The body can be 9 - 15 times the length of its head with small eyes and a prominent snout. The pectoral fins (fins on each side closest to the head) are fringed...

Marbled Lungfish, Protopterus Aethiopicus
2012-12-25 12:06:57

The marbled lungfish is found mainly in the Nile river, in the northeastern continent of Africa. It also is found in such lakes as the Albert, Edward, Tanganyika, Victoria, Nabugabo, No and Kyoga, all centrally located in Africa at the southern end of the Nile. They live in the shallow areas of these lakes, streams, rivers, and swamps. During the dry season, many of the areas will dry up and when this occurs the marbled lungfish will bury themselves in the mud leaving just a small opening...

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2007-03-19 14:52:30

The Queensland lungfish, Neoceratodus forsteri, also known as Burnett salmon and Barramunda, is the sole member of the family Ceratodontidae, and one of the only six lungfish species that remain. Olive or dull brown in color, it grows to about 59.06 in (150 cm) in length, more commonly 39.37 (100 cm). It is native to the Burnett and Mary River systems of south-east Queensland, but has been introduced into other nearby rivers, including the Brisbane River. It prefers still or slow-flowing...

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Word of the Day
bellycheer
  • Good cheer; viands.
  • To revel; to feast.
The word 'bellycheer' may come from 'belle cheer', "good cheer".
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