Latest topics
» Activists From Hundreds of Cities Around the World Take Action Against 5G Roll Out
Scientists Discover 310-Million-Years-Old Nursery of Bandringa Sharks EmptyToday at 1:34 am by PurpleSkyz

» Britain's 'X-Files' set to be published this year
Scientists Discover 310-Million-Years-Old Nursery of Bandringa Sharks EmptyToday at 1:01 am by PurpleSkyz

» UFO News ~ Jellyfish like UFO caught on camera China Great Wall CCTV plus MORE
Scientists Discover 310-Million-Years-Old Nursery of Bandringa Sharks EmptyToday at 12:48 am by PurpleSkyz

» “The Chinese virus is spreading”—deception and false news
Scientists Discover 310-Million-Years-Old Nursery of Bandringa Sharks EmptyToday at 12:44 am by PurpleSkyz

» #QTard Drama Theater - Juan O Savin- Gen. Flynn from Benghazi to Burisma plus more
Scientists Discover 310-Million-Years-Old Nursery of Bandringa Sharks EmptyToday at 12:37 am by PurpleSkyz

» Unknown spacecraft and ancient triangle UFO discovered in Antarctica
Scientists Discover 310-Million-Years-Old Nursery of Bandringa Sharks EmptyToday at 12:35 am by PurpleSkyz

» The Astonishing Ruins of Udayagiri ⁓ Left By Lost Civilisation?
Scientists Discover 310-Million-Years-Old Nursery of Bandringa Sharks EmptyToday at 12:33 am by PurpleSkyz

» Japan Inactivates All Radiation Monitors Ahead Of Tokyo Olympics
Scientists Discover 310-Million-Years-Old Nursery of Bandringa Sharks EmptyToday at 12:27 am by PurpleSkyz

» Body Language: House Managers Vs Trump’s Defense Team
Scientists Discover 310-Million-Years-Old Nursery of Bandringa Sharks EmptyYesterday at 9:22 pm by PurpleSkyz

» Sourcetruth's "Gaslighting" - Tactics Used By Cult/Scam Artists
Scientists Discover 310-Million-Years-Old Nursery of Bandringa Sharks EmptyYesterday at 8:16 pm by PurpleSkyz

» Watch: ‘Greta Thunberg Incorporated: The Exposé’
Scientists Discover 310-Million-Years-Old Nursery of Bandringa Sharks EmptyYesterday at 7:07 pm by PurpleSkyz

» CORONAVIRUS LATEST: OVER 2,800 GLOBAL CASES RESULTING IN 80 FATALITIES plus MORE
Scientists Discover 310-Million-Years-Old Nursery of Bandringa Sharks EmptyYesterday at 7:04 pm by PurpleSkyz

» Scam Alert! The Sourcetruth Matrix Cult Video
Scientists Discover 310-Million-Years-Old Nursery of Bandringa Sharks EmptyYesterday at 11:44 am by RamblerNash

» Bin Laden, 9:11 & The CIA Database - David Icke
Scientists Discover 310-Million-Years-Old Nursery of Bandringa Sharks EmptyYesterday at 11:44 am by PurpleSkyz

» UFO News ~ Bright UFO Sighted In Mexico - Strange Blue Light! plus MORE
Scientists Discover 310-Million-Years-Old Nursery of Bandringa Sharks EmptyYesterday at 11:40 am by PurpleSkyz

» Cult Alert - Sourcetruth Enterprises Inc. Continues To Expand
Scientists Discover 310-Million-Years-Old Nursery of Bandringa Sharks EmptyYesterday at 11:38 am by RamblerNash

» Benjamin blablabla Fulford 1-27-2020… Khazarian mob using virus fear porn in desperate attempt to keep control over its 200-plus “nation states”
Scientists Discover 310-Million-Years-Old Nursery of Bandringa Sharks EmptyYesterday at 11:31 am by PurpleSkyz

» POOPness for JAN 26: Days Like This
Scientists Discover 310-Million-Years-Old Nursery of Bandringa Sharks EmptyYesterday at 11:11 am by PurpleSkyz

» Split Hearings: The Assange Extradition Case Drags On
Scientists Discover 310-Million-Years-Old Nursery of Bandringa Sharks EmptyYesterday at 11:01 am by PurpleSkyz

» Footage Appears to Show Canada’s Legendary ‘60ft-long’ Lake Monster Ogopogo
Scientists Discover 310-Million-Years-Old Nursery of Bandringa Sharks EmptyYesterday at 10:49 am by PurpleSkyz






CURRENT MOON




You are not connected. Please login or register

OUT OF MIND » NEW EARTH AWARENESS » SCIENCE & TECHNOLOGY » Scientists Discover 310-Million-Years-Old Nursery of Bandringa Sharks

Scientists Discover 310-Million-Years-Old Nursery of Bandringa Sharks

Go down  Message [Page 1 of 1]

PurpleSkyz

PurpleSkyz
Admin
Scientists Discover 310-Million-Years-Old Nursery of Bandringa Sharks

Jan 10, 2014 by Sci-News.com
« PREVIOUS
|
NEXT »

According to paleontologists from the University of Chicago and the University of Michigan, long-extinct Bandringa sharks migrated downstream from freshwater swamps to the ocean to spawn in shallow coastal waters and left behind fossil evidence of one of the earliest known shark nurseries.
Scientists Discover 310-Million-Years-Old Nursery of Bandringa Sharks Image_1678_1-Bandringa-shark
This is an artist’s impression of Bandringa shark. Image credit: John Megahan / University of Michigan.
The long-snouted Bandringa shark (Elasmobranchii, Chondrichthyes) – a bottom-feeding predator that lived in an ancient river delta system in what is today the Upper Midwest – is likely one of the earliest close relatives of modern sharks.
It resembled present-day sawfish and paddlefish, with a spoon-billed snout up to half its body length. Juveniles were 4 to 6 inches long and grew into adults of up to 10 feet.
Bandringa sharks were discovered in 1969 and soon became one of the most prized fossils from the well-known Mazon Creek deposits in northern Illinois.
Until now, paleontologists believed that the genus Bandringa contained two species – B. rayi and B. herdinae , one that lived in freshwater swamps and rivers and another that lived in the shallow ocean.
But after reevaluating fossils from 24 individuals, Dr Lauren Sallan and Dr Michael Coates concluded that Bandringa was a single species that lived, at various times during its life, in fresh, brackish and salt water.
“The physical differences between the two purported species were due to different preservation processes at marine and freshwater locations. The freshwater sites tended to preserve bones and cartilage, while the marine sites preserved soft tissue,” explained Dr Sallan and Dr Coates, co-authors of the paper published in the Journal of Vertebrate Paleontology .
Scientists Discover 310-Million-Years-Old Nursery of Bandringa Sharks Image_1678_2-Bandringa-shark
This image shows a fossil impression left by a juvenile Bandringa shark. This individual measures about 4 inches from snout to tail and was found in marine sediments at the Mazon Creek deposit in Illinois. Image credit: Lauren Sallan / Michael Coates.
By combining the complementary data sets from both types of fossil sites and reclassifying Bandringa as a single species, the team gained a far more complete picture of the extinct shark’s anatomy and discovered several previously unreported features. They include downward-directed jaws ideal for suction-feeding off the bottom, needle-like spines on the head and cheeks, and a complex array of sensory organs on both the extended snout and body, suited for detecting prey in murky water.
The Bandringa fossils also reveal the only known example of a freshwater to saltwater shark migration, as well as a 310-million-year-old shark nursery where fossilized egg cases and juvenile sharks were preserved in the same sediments.
“Adult Bandringa sharks lived exclusively in freshwater swamps and rivers,” the scientists said.
“Females apparently traveled downstream to a tropical coastline to lay their eggs in shallow marine waters, a reverse version of the modern-day salmon’s sea-to-stream migration. At the time, the coastline of the super-continent Pangaea ran diagonally between the Mazon Creek freshwater and marine sites.”
______
Lauren Cole Sallan & Michael I. Coates. 2014. The long-rostrumed elasmobranch Bandringa Zangerl, 1969, and taphonomy within a Carboniferous shark nursery. Journal of Vertebrate Paleontology, vol. 34, no. 1, pp. 22-33; doi: 10.1080/02724634.2013.782875




Thanks to: http://www.sci-news.com
and: http://familysurvivalprotocol.com



  

Back to top  Message [Page 1 of 1]

Permissions in this forum:
You cannot reply to topics in this forum