Navigation Links
Duck-billed dino crests not linked to sense of smell

After decades of debate, a U of T researcher has finally determined that duck-billed dinosaurs' massive but hollow crests had nothing to do with what many scientists suspected -- the sense of smell.

Speculation about their function has led to theories that the crests functioned as everything from brain coolers to snorkels for underwater feeding. Now, David Evans, a PhD student in zoology at the University of Toronto at Mississauga, has been able to use a reconstructed brain cavity to rule out one historically popular theory: that the crests evolved to increase the animal's sense of smell. "From the brain case, there's no indication that the nerves curled upwards into the crest, as we would expect if the crest was used for the sense of smell," Evans says.

"It appears that the brain changed very little from their non-crested dinosaur ancestors, and that the primary region of the sense of smell was located right in front of the eyes ?and coincidentally, that's where it is in birds, crocodiles, mammals and basically all four-legged animals."

Evans studied fossils from a group of herbivorous dinosaurs called lambeosaurs, which are often referred to as crested duck-billed dinosaurs. Lambeosaurs are easily recognizable for their large cranial crests, which contain elongated nasal passages and loop over their skull. Duck-billed dinosaurs are sometimes referred to as the "Cows of the Cretaceous period" and lived 85 million to 65 million years ago.

Evans reconstructed the dinosaurs' brain cavity using well-preserved fragments of fossilized bone and created the first-ever cast of the lambeosaur brain, which is approximately the size of a human fist. The findings add weight to two currently popular theories: that the crests were used to create resonant sounds to attract mates or warn of predators, or that they were used for visual display in mate selection or species recognition, similar to feather crests in some birds.


'"/>

Source:University of Toronto


Page: 1

Related biology news :

1. Newly discovered virus linked to childhood lung disorders and Kawasaki disease
2. Low level of extinction during ice age linked to adaptability
3. Improved statistical tools reveal many linked loci
4. Scientists at Galileo Pharmaceuticals confirm inflammatory response linked to glucose levels
5. Attacks of King George IIIs madness linked to key metabolism molecule
6. Gene controlling circadian rhythms linked to drug addiction
7. Physical and functional interaction of key cell growth molecules linked to cancer
8. VCU Massey Cancer Center study shows enzyme linked to spread of breast cancer cells
9. Naturally occurring asbestos linked to lung cancer
10. Disappearing arctic lakes linked to climate change
11. Genes linked to treatment resistance in children with leukemia
Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Duck billed dino crests not linked sense smell

(Date:4/13/2015)... 13, 2015 According to ... Biometrics Market Forecast & Opportunities, 2020", the global biometrics ... around 14% till 2020. The biometrics market is ... implementation and review of biometric management systems. The ... products with greater efficiency, are resulting in increasing ...
(Date:4/9/2015)... SAN JOSE, Calif. , April 9, 2015 /PRNewswire/ ... of human interface solutions, announced today that it will ... 2015 on Thursday, April 23, 2015, after the close ... call for analysts and investors at 2:00 p.m. PT ... information.    To participate on the live ...
(Date:4/2/2015)... 2015 In the current ... outperforms the strongest competitors, showing outstanding performance in ... system is capable of a throughput of 5.000.000 ... to be ten times faster than most competitors ...      (Photo: http://photos.prnewswire.com/prnh/20150402/738673-a ) ...
Breaking Biology News(10 mins):Global Biometrics Market to Cross US$ 21 Billion by 2020: TechSci Research 2Synaptics to Report Third Quarter Results on April 23 2DERMALOG AFIS Emerges as Performance Winner in NIST Benchmark Test 2DERMALOG AFIS Emerges as Performance Winner in NIST Benchmark Test 3
... 17, 2009 Time and time again, it has been ... risks associated with the comorbidities of obesity. With only ... Institutes of Health exercise guidelines of 300 minutes/week, a study ... Nutrition Education and Behavior explores the paradox that exists ...
... Maternal behavior itself can trigger the development of new ... female was pregnant or has nursed, according to a ... of Veterinary Medicine. These findings performed in adult, virgin ... and are available online at http://dx.doi.org/10.1016/j.brainresbull.2009.08.011 . ...
... possible to use therapeutic vaccines to create both cheap and ... in developing such vaccines has previously been the lack of ... now been a major breakthrough in this area. The study, ... December issue of the journal Vaccine . Many ...
Cached Biology News:Negative emotions outweigh intent to exercise at health clubs 2Exposure to young triggers new neuron creation in females exhibiting maternal behavior 2Major breakthrough may pave the way for therapeutic vaccines 2
(Date:4/16/2015)... OSAKA, Japan , April 16, 2015 ... of Kyoto University and Takeda Pharmaceutical Company Limited ... to develop clinical applications of induced pluripotent stem ... mellitus, neurological disorders and cancer immunotherapy. The "Takeda-CiRA ... designed to expedite multiple research projects for drug ...
(Date:4/16/2015)... 2015 Cytokinetics, Incorporated (Nasdaq: CYTK) announced ... results on Thursday, April 30, 2015 at 4:00 PM ... host a conference call at 4:30 PM Eastern Time ... outlook for the future. , The conference call will ... homepage and in the Investor Relations section of Cytokinetics’ ...
(Date:4/16/2015)... Proove Biosciences , Inc. is pleased ... for the 2015 BIO International Convention. Hosted by ... Convention will take place June 15-18 at the Pennsylvania ... BIO contest, industry leaders will be voting for companies ... The community voting period began on April 14, 2015 ...
(Date:4/16/2015)... Grove, IL (PRWEB) April 16, 2015 ... the American Association for Cancer Research (AACR) annual ... the Pennsylvania Convention Center, starting Saturday, April 18, in ... AACR holds claim to title of the oldest and ... journals, provides fellowships and grants, and partners with survivors ...
Breaking Biology Technology:CiRA and Takeda Enter 10-year Collaboration on iPS Cell Research 2CiRA and Takeda Enter 10-year Collaboration on iPS Cell Research 3Cytokinetics to Announce First Quarter Results on April 30, 2015 2Cytokinetics to Announce First Quarter Results on April 30, 2015 3Proove Bisociences to Participate in the Buzz of BIO at the 2015 BIO International Convention 2Proove Bisociences to Participate in the Buzz of BIO at the 2015 BIO International Convention 3Regis Technologies Joins American Association for Cancer Research Annual Meeting 2
... NEW YORK, Dec. 17 In its second annual ... rising,young scientists who are making an impact early in ... large-scale biomedical research through the,eyes of some of the ... contributions to their areas of interest., The young ...
... Chief Technology Officer, MENLO PARK, Calif., Dec. ... commercializing a patented,proprietary sensor technology platform having applications ... announced today that Robin C.,Stracey has joined the ... 17, 2007. He has also been appointed to ...
... Pilot Chevrolet Car, VALLEY FORGE, Pa., Dec. 17 ... joined with Diversified Racing Solutions,(DRS) to enter the NASCAR(R) ... the NASCAR Sprint Cup Series in 2010. In the ... the flagship,sponsor; the venture will be primarily funded by ...
Cached Biology Technology:Genome Technology Magazine Names Top Young Investigators of 2007 2Robin C. Stracey Joins Cantimer, Inc. as President and CEO 2Good Neighbor Pharmacy Joins with Diversified Racing Solutions to Enter NASCAR Nationwide Series in 2008 2
... Human Pathogenic Viruses The National ... preserves well characterised, authenticated human ... facility, and NCPV is able ... nucleic acids derived from them, ...
... 5 Fluorescein 6-Fam, Hex, ... 3 Fluorescein Tamra Black Hole ... 6-Fam, Hex, Tet Tamra, Joe ... Health Research Institute, New York Double labelled ...
... flexible and easy to use ... control all members of the ... features a clear and easy-to-follow ... setup, user-friendly and highly sophisticated ...
... is a highly purified preparation of the ... protease which recognizes the identical cleavage site ... similar enzymatic activity (1). Novagen&'s enzyme is ... yield the highest activity available, and is ...
Biology Products: