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Latest Gnathostomata Stories

The Evolution Of Jaws Based On A 325M-Year-Old Shark-Like Fossil
2014-04-17 07:20:53

April Flowers for redOrbit.com - Your Universe Online Despite having retained their basic "sharkiness" for millions of years, modern sharks have less to tell us about the early evolution of jawed vertebrates—including humans—than was previously thought. A new study led by the American Museum of Natural History, based on the skull of a newly discovered 325-million-year-old shark-like species, reveals that modern sharks are quite evolutionarily advanced when compared to early...

Vertebrate Study Reveals The Evolution Of The Face
2014-02-13 09:19:21

[ Watch the Video: Animation Sequence of Romundina Fish Fossil ] Brett Smith for redOrbit.com - Your Universe Online Faces allow us to recognize each other almost instantaneously – so much so that they are the primary feature on our driver’s licenses and other identification cards. A study published on Wednesday in the journal Nature has revealed new details on the evolution of the jaw – a major defining structure in the evolution of the face. In the study, a team of...

New Species Of Marine Fish From The Devonian Period Discovered In Teruel
2013-06-03 18:50:57

FECYT - Spanish Foundation for Science and Technology Researchers from the University of Valencia and the Natural History Museum of Berlin have studied the fossilized remains of scales and bones found in Teruel and the south of Zaragoza, ascertaining that they belong to a new fish species called Machaeracanthus goujeti that lived in that area of the peninsula during the Devonian period. The fossils are part of the collection housed in the Palaeontology Museum of Zaragoza. In the journal...

New Insight Into Evolution Offered From Unusual Anal Fin
2013-04-10 09:31:33

University of Manchester An unusual fossil fish that has fins behind its anus could have implications for human evolution according to a scientist at The University of Manchester. Dr Robert Sansom from the Faculty of Life Sciences identified the paired fins of Euphanerops, a fossil jawless fish that swam in the seas around 370 million years ago. The find makes the fish one of the first vertebrate to develop paired appendages such as fins, legs or arms. However, their positioning is...

Genome Sequencing Of The Sea Lamprey Completed By Researchers
2013-03-02 05:21:25

Brett Smith for redOrbit.com - Your Universe Online According to a report in the journal Nature Genetics, an international team of geneticists has announced the successful sequencing of the sea lamprey genome. The sea lamprey makes for an interesting genetic case from an evolutionary standpoint, being a jawless vertebrate that diverged from jawed vertebrates millions of years ago. “The sea lamprey is a primitive jawless vertebrate that diverged from other jawed vertebrates...

Researchers Find Origins Of Teeth Much Older Than Previously Believed
2012-10-18 12:57:12

Michael Harper for redOrbit.com — Your Universe Online It´s likely the question “how long have humans had teeth?” has never entered into many normal and sober minds. Scientists and, more specifically, odontologists, are a different breed, however, and have wondered about the origins of teeth for many years. Now, thanks to a particle accelerator and a very, very dead fish, scientists have concluded that teeth may be much older than they had previously assumed....

2011-07-07 00:38:56

New data on the initial diversification of jaws sheds light on early vertebrate feeding ecology More than 99 per cent of modern vertebrates (animals with a backbone, including humans) have jaws, yet 420 million years ago, jawless, toothless armour-plated fishes dominated the seas, lakes, and rivers. There were no vertebrates yet on land and the recently evolved jawed fishes were minor players in this alien world, some sporting unusual jaw shapes and structures that bear little physical...

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2009-02-25 18:00:00

New research published Wednesday shows that sex has been around for much longer than many scientists had previously believed, with internal fertilization prevalent among prehistoric fish living on tropical reefs during the Devonian period 380 million years ago.The study reveals new insight on the reproductive history of all jawed vertebrates, including humans."It shifts how we think about how reproduction evolved. You're a jawed vertebrate and I'm a jawed vertebrate, so this is our own...

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2009-01-19 13:45:33

A Swedish scientist has reported the finding of a fossilized specimen that may provide new insight into how jawed vertebrates evolved. Martin Brazeau, of the Department of Physiology and Developmental Biology at Uppsala University in Sweden, said the fossil was discovered Herefordshire, UK, in the 1940s and is an estimated 415 million years old. The specimen is the first-known braincase of an Early Devonian acanthodian "“ which is possibly the earliest group of gnathostomes (jawed...


Word of the Day
kenspeckle
  • Having so marked an appearance as easily to be recognized.
This word may come from the Swedish 'kanspak,' quick at recognizing persons or things, or else from confusion with 'conspicuous.'