Arab Today, arab today preamazonian peru was ruled by crocodiles
Last Updated : GMT 10:17:01
Arab Today, arab today
Arab Today, arab today

Pre-Amazonian Peru was ruled by crocodiles

Arab Today, arab today

Arab Today, arab today Pre-Amazonian Peru was ruled by crocodiles

Model of the head of Gnatusuchus pebasensis
Washington - UPI

Before the Amazon River formed as we know it today, some 10.5 million years ago, water in the Amazon basin flowed northward to the Caribbean. Instead of thick rainforest, the habitat was a massive wetland system -- a system researchers say was dominated by crocodiles.
Some 13 million years ago, northeastern Peru hosted seven species of crocodiles, a diverse co-existing assemblage not seen before or since. The arrival of the Amazon, flowing toward the Atlantic, flooded the habitat and diminished mollusk populations -- the main food source for several of the thriving croc species.
"We uncovered this special moment in time when the ancient mega-wetland ecosystem reached its peak in size and complexity, just before its demise and the start of the modern Amazon River system," the lead study author Rodolfo Salas-Gismondi, a researcher at the University of Montpellier, in France, said in a press release.
"At this moment, most known caiman groups co-existed: ancient lineages bearing unusual blunt snouts and globular teeth along with those more generalized feeders representing the beginning of what was to come," Salas-Gismondi added.
Species of crocodiles with more a more generalized approach to feeding were more likely to survive the changes. Today, six caiman crocodile species live in the Amazon basin, but no more than three exist in the same habitat.
Clams and snails (and the crocs that ate them) weren't the only ones hard done by the formation of the modern Amazon River. It also made paleontology exceptionally difficult.
"The modern Amazon River basin contains the world's richest biota, but the origins of this extraordinary diversity are really poorly understood," said co-author John Flynn, an paleontologist and curatory with the American Museum of Natural History.
"Because it's a vast rain forest today, our exposure to rocks -- and therefore, also to the fossils those rocks may preserve -- is extremely limited," Flynn explained. "So anytime you get a special window like these fossilized 'mega-wetland' deposits, with so many new and peculiar species, it can provide novel insights into ancient ecosystems."
The new research was published this week in the journal Proceedings of the Royal Society B.

Name *

E-mail *

Comment Title*

Comment *

: Characters Left

Mandatory *

Terms of use

Publishing Terms: Not to offend the author, or to persons or sanctities or attacking religions or divine self. And stay away from sectarian and racial incitement and insults.

I agree with the Terms of Use

Security Code*

Arab Today, arab today preamazonian peru was ruled by crocodiles Arab Today, arab today preamazonian peru was ruled by crocodiles

 



Arab Today, arab today
Arab Today, arab today Prepares to present her new collection

GMT 14:29 2017 Monday ,20 February

Prepares to present her new collection
Arab Today, arab today Tourism shows signs of recovery

GMT 09:59 2017 Monday ,20 February

Tourism shows signs of recovery
Arab Today, arab today Sarah Belamesh designs antiques of "ceramic"

GMT 19:45 2017 Monday ,20 February

Sarah Belamesh designs antiques of "ceramic"
Arab Today, arab today 11 family members dead in rebel push

GMT 07:57 2017 Tuesday ,21 February

11 family members dead in rebel push
Arab Today, arab today To probe sexual harassment claims

GMT 10:08 2017 Tuesday ,21 February

To probe sexual harassment claims
View News in Arabic - Education: كتب ومراجع وأبحاث
Arab Today, arab today
Arab Today, arab today
Arab Today, arab today Kidogo provides childcare for underserved

GMT 20:24 2017 Wednesday ,15 February

Kidogo provides childcare for underserved
Arab Today, arab today Tragic fluctuations of Bakhtiari's life revealed

GMT 06:50 2017 Wednesday ,15 February

Tragic fluctuations of Bakhtiari's life revealed
Arab Today, arab today London to tax old cars

GMT 14:06 2017 Friday ,17 February

London to tax old cars
Arab Today, arab today Pluto's unruly moons

GMT 06:31 2015 Thursday ,04 June

Pluto's unruly moons
Arab Today, arab today Nissan enhances sales in most markets

GMT 14:08 2017 Monday ,20 February

Nissan enhances sales in most markets
Arab Today, arab today Competes Sweden and Germans by S90

GMT 22:36 2017 Thursday ,16 February

Competes Sweden and Germans by S90
Arab Today, arab today Ahmed Fahmy stresses he did not ignore singing

GMT 06:34 2017 Sunday ,19 February

Ahmed Fahmy stresses he did not ignore singing
Arab Today, arab today Teach monkeys to recognize themselves in mirror

GMT 20:41 2017 Wednesday ,15 February

Teach monkeys to recognize themselves in mirror

GMT 21:11 2017 Saturday ,18 February

Egypt to hold first session of Arab film festival

GMT 06:40 2017 Friday ,10 February

MP calls for removing text from Islamic story

GMT 19:10 2017 Friday ,17 February

Hats, scarves add beauty to women

GMT 10:26 2017 Tuesday ,14 February

Emergency UN meeting in Harare

GMT 23:29 2017 Thursday ,16 February

Home built on sand castles-style costs $8m

GMT 14:51 2017 Monday ,20 February

Ways to acquire presentation skills

GMT 19:16 2017 Friday ,17 February

Aziz House ready to host the tourists

GMT 13:12 2015 Saturday ,09 May

Sheikh Sultan opens Sharjah Centre

GMT 12:39 2017 Monday ,20 February

newest smartphone another winner for Huawei

GMT 13:16 2017 Tuesday ,14 February

First fashion model with Down syndrome
Arab Today, arab today
Arab Today, arab today
 
 Arab Today Facebook,arab today facebook  Arab Today Twitter,arab today twitter Arab Today Rss,arab today rss  Arab Today Youtube,arab today youtube  Arab Today Youtube,arab today youtube
arabstoday arabstoday arabstoday arabstoday
arabstoday arabstoday arabstoday
arabstoday
بناية النخيل - رأس النبع _ خلف السفارة الفرنسية _بيروت - لبنان
arabstoday, Arabstoday, Arabstoday