Navigation Links
New coelacanth find rewrites history of the ancient fish
Date:5/3/2012

(Edmonton) Coelacanths, an ancient group of fishes once thought to be long extinct, made headlines in 1938 when one of their modern relatives was caught off the coast of South Africa. Now coelacanths are making another splash and University of Alberta researchers are responsible.

Lead U of A researcher Andrew Wendruff identified fossils of a coelacanth that he says are so dramatically different from previous finds, they shatter the theory that coelacanths were evolutionarily stagnant in that their body shape and life-style changed little since the origin of the group.

Wendruff says his one-metre-long, forked tailed coelacanth was an 'off-shoot' lineage that lived 240 million years ago. It falls between the earliest coelacanth fossils of 410 million years ago and the latest fossils dated about 75 million years ago, near the end of the age of dinosaurs.

"Our coelacanth had a forked tail, indicating it was a fast-moving, aggressive predator, which is very different from the shape and movement of all other coelacanths in the fossil record," said Wendruff.

Wendruff's research co-author, U of A Professor Emeritus Mark Wilson, describes typical coelacanths as having chunky bodies, fins of varying size and broad, flexible tails. "These fish were slow moving and probably lay in wait for their prey," said Wilson.

Wendruff's coelacanth is named Rebellatrix, which means rebel coelacanth. The researchers say Rebellatrix came along after the end-Permian mass extinction 250 million years ago, an event so lethal it wiped out 90 per cent of marine life. Rebellatrix filled a previously unoccupied predator niche, but it didn't fare well.

"Rebellatrix was likely a spectacular failure in the evolution of cruising predation," said Wendruff. "Clearly some other fish groups with forked-tails must have outperformed this coelacanth as it does not appear later in the fossil record."

The fossils of Rebellatrix described by the U of A team were found in the Rocky Mountains near Tumbler Ridge, British Columbia.

The research by Wendruff and Wilson was published May 2, as the cover article in the Journal of Vertebrate Paleontology.


'/>"/>

Contact: Brian Murphy
brian.murphy@ualberta.ca
780-492-6041
University of Alberta
Source:Eurekalert

Related biology news :

1. Study rewrites the evolutionary history of C4 grasses
2. Extinct moa rewrites New Zealands history
3. Earth history and evolution
4. Family history of liver cancer increases risk of developing the disease
5. Scientists trace evolutionary history of what mammals eat
6. Hidden in plain sight, concrete holds a strange history
7. Nobel history illustrates gap in grants to young scientists
8. What makes rainforests unique? History, not ecology
9. Using human genomes to illuminate the mysteries of early human history
10. Mouse genome sequences reveal variability, complex evolutionary history
11. Sea smarts: Scientists reconstruct evolutionary history of mollusks
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:3/22/2016)... 22, 2016 According ... Market for Consumer Industry by Type (Image, Motion, ... (Communication & IT, Entertainment, Home Appliances, & ... to 2022", published by MarketsandMarkets, the market ... reach USD 26.76 Billion by 2022, at ...
(Date:3/17/2016)... -- ABI Research, the leader in transformative technology ... will reach more than $30 billion by 2021, ... electronics, particularly smartphones, continue to boost the biometrics ... two billion shipments by 2021 at a 40% ... Analyst at ABI Research. "Surveillance is also gearing ...
(Date:3/14/2016)... http://www.apimages.com ) - ... - Renvoi : image disponible via AP Images ( ... --> DERMALOG, le leader de l,innovation ... d,empreintes digitales pour l,enregistrement des réfugiés en Allemagne. ... produire des cartes d,identité aux réfugiés. DERMALOG dévoilera ...
Breaking Biology News(10 mins):
(Date:5/20/2016)... ... May 20, 2016 , ... The leading Regenerative Veterinary Medicine ... experienced veterinary clients have treated over 100 of their own patients with the VetStem ... the highest level of care for their patients. , The veterinarians are Dr ...
(Date:5/20/2016)... ... ... The recent recall by Costco and Trader Joes of 47 million pounds ... 2016(1), demonstrates the need for faster and more cost effective bio-threat detection to ensure ... , PathSensor’s latest solution uses a biosensor technology called CANARY®. CANARY®, ...
(Date:5/19/2016)... May 19, 2016 There is ... recover given the relentless pressures in pricing and lack ... the investors circle though - numerous opportunities are up ... today,s session, ActiveWallSt.com,s presents four names in this sector: ... Pharmaceuticals Inc. (NASDAQ: VTAE ), Anthera Pharmaceuticals ...
(Date:5/19/2016)... - I dati saranno presentati ... 52 ° Congresso della Società ... - Le conclusioni dello studio indicano un tasso di ... cui il 90% presenta una d urata della risposta ... settantadue per cento dei pazienti ha riscontrato un beneficio clinico. ...
Breaking Biology Technology: