Your distant human ancestor? He may have had a shark head
2012 06 14

By Stephanie Pappas | LiveScience / MSNBC

Peer far enough back in the human family lineage, and you’ll find a fishy ancestor that looked surprisingly like a shark.

In fact, this now-extinct fish was among the first to split from sharks, whose bones are made of cartilage, to evolve into a line of tough-boned species that includes everything from bony fish to human beings. A new analysis finds that this controversial class of animals was more shark-like than expected.

"The common ancestors of all jawed vertebrates today organized their heads in a way that resembled sharks," study researcher John Finarelli, a vertebrate biologist at University College, Dublin, said in a statement. "Given what we now know about the interrelatedness of early fishes, these results tell us that while sharks retained these features, bony fishes moved away from such conditions."



Molds of the cranium of Acanthodes Bronni. Megan Doherty / University of Chicago


Finarelli and his colleagues examined a fish called Acanthodes bronni, part of the acanthodian group of fish, which included the earliest vertebrate animals with jaws. A. bronni lived about 290 million years ago, during the Paleozoic period. The shark family and the bony fish families split about 460 million years ago.

[...]


Read the full article at: msnbc.msn.com

Front Page Thumbnail: Source





Related Articles
Massive great white shark launches frenzied attack next to fishing boat
EU bans practice of chopping off shark fins
Extremely rare One-Eyed "Cyclops" Albino Shark Found
Deformed Skull Suggests Human Ancestors Had Compassion
Humans are descended from fish-like animal with a ’sixth sense’


Latest News from our Front Page

VOTER FRAUD: Was the Scottish Independence Referendum Rigged to Fail?
2014 09 20
Was voter fraud committed during the Scottish Independence referendum? It has been confirmed that the names of 10 people were already crossed off a voter list prior them voting inside a polling station. According to reports, the Glasgow City Council confirmed that there were ten cases of suspected electoral fraud occurring at polling stations following the Scottish referendum vote on the 18th. ...
Scandinavians Split Over Syrian Influx
2014 09 20
This exemplifies the insanity of Scandinavia. The narrow victory of the left-leaning Social Democratic Party in Sweden’s elections last Sunday marked a broad shift in its politics. But a new coalition government is unlikely to reconsider one of the country’s most challenging policies: its response to the Syrian civil war. Sweden has taken an open-door approach to people fleeing the conflict, ...
The Israel lobby in United Kingdom - Who Runs Britain?
2014 09 20
Who runs British politics? Who in Britain supports all the wars the UK has been involved in? The Israel Lobby in the UK - Full Documentary By Peter Oborne from Dispatchees Links from Youtube: Zionist attack on western civilization Reed Douglas - The Controversery of Zion Source: youtube.com The cowardice at the heart of UK relationship with Israel Close friends and allies: Prime Minister David Cameron ...
Another Palestinian Mass Grave Discovered, Evidence of Massacre
2014 09 20
Another mass grave discovered, evidence of 1948 Judaic holocaust by bullets, knives and bludgeons against Palestinians. The Israeli military admits to have been surprised by the abilities of Palestinian resistance fighters during its recent war on the Gaza Strip. A top Israeli military official says he’s impressed by the training of Palestinian resistance fighters from Hamas and the Islamic Jihad groups. He ...
Russian Media to be owned by Russians
2014 09 20
Comment: Russian media by and for Russians? Wow, revolutionary! I guess they are stick of foreign oligarchs and zionist with dual citizenship. Duma seeks limits on foreign ownership of Russian media companies A group of opposition lawmakers have prepared a bill that orders Russian mass media companies to have at least 80 percent of their stock held by Russian investors. The bill is backed ...
More News »