HOME >> BIOLOGY >> NEWS
Jurassic period mammal teeth found; prevailing theories challenged

(Santa Barbara, Calif.) Paleontologists have discovered three tiny teeth embedded in a piece of lower jawbone from a small Jurassic period mammal on the island of Madagascar, evidence that some of our mammalian ancestors roamed the Earth at exactly the same time as the dinosaurs, according to an article in the Sept. 2 Nature.

The finding more than doubles the age of the oldest known mammal from Madagascar. Until now, terrestrial fossils were all but unknown from Madagascar for this time interval.

These small, furry creatures, the size of a house mouse, lived in Madagascar during the Middle Jurassic period -- about 165 million years ago -- scampering under the feet of allosaurs and brachiosaurs, much earlier than scientists had previously thought. The findings also show that an advanced subgroup of mammals evolved in the Southern hemisphere, challenging the prevailing notion that it came from the north.

"Smack in the middle of the dinosaurs' heyday, our ancestors were living as well -- it's just that they were small and inconspicuous," said Andre R. Wyss, associate professor of geology at the University of California, Santa Barbara, and one of the authors of the article.

The National Geographic Society funded the research, a collaboration that included John J. Flynn and William F. Simpson, of the department of geology, the Field Museum of Natural History in Chicago; J. Michael Parrish of the department of biology, Northern Illinois University, DeKalb; Berthe Rakotosamimanana of the department of Paleontology, University d'Antananarivo, Madagascar; and, Andre R. Wyss, of the department of geology, UC, Santa Barbara.

"The most conspicuous and hence the most famous land animals of the Mesozoic Era were of course the dinosaurs," explained Wyss. "Less widely appreciated is the fact that furry animals -- mammals -- and dinosaurs sprang on an evolutionary scene at about the same time; the t
'"/>

Contact: Bill Schlotter
bschlott@instadv.ucsb.edu
805-893-8735
University of California - Santa Barbara
1-Sep-1999


Page: 1 2 3 4

Related biology news :

1. Mass extinction at the Triassic-Jurassic boundary
2. Beyond Jurassic Park: Real Science With Ancient DNA
3. Jurassic Beetle: CSIRO Entomologist Discovers Living Fossil
4. Double-segment periodicity underlies odd segment generation in centipedes
5. Human periodontal ligament stem cells isolated for the first time
6. IU and Purdue scientists to answer questions about Brood X periodical cicadas
7. First draft of periodic table of protein structures helps visualize natures universe of proteins
8. Higher fibre intake linked to later periods, scientists say
9. Warmer periods in Alaskan area not confined to modern times
10. A pill for reversible suppression of periods - a new option
11. Scientists sequence genome of major periodontal disease bacterium

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:5/3/2016)... , May 3, 2016  Neurotechnology, a ... the MegaMatcher Automated Biometric Identification System (ABIS) ... large-scale multi-biometric projects. MegaMatcher ABIS can process multiple ... using any combination of fingerprint, face or iris ... MegaMatcher SDK and MegaMatcher Accelerator , ...
(Date:4/26/2016)... LONDON , April 26, 2016 ... EdgeVerve Systems, a product subsidiary of Infosys (NYSE: ... a partnership to integrate the Onegini mobile security ... (Logo: http://photos.prnewswire.com/prnh/20151104/283829LOGO ) The ... enhanced security to access and transact across channels. ...
(Date:4/15/2016)... CHICAGO , April 15, 2016  A ... companies make more accurate underwriting decisions in a ... offering timely, competitively priced and high-value life insurance ... health screenings. With Force Diagnostics, rapid ... and lifestyle data readings (blood pressure, weight, pulse, ...
Breaking Biology News(10 mins):
(Date:5/25/2016)... , ... May 25, 2016 , ... ... Fitzmaurice recently became double board-certified in surgery and surgery of the hand by ... Fitzmaurice is no stranger to going above and beyond in his pursuit of ...
(Date:5/25/2016)... , ... May 25, 2016 , ... ... Food and Drug Administration (FDA) has granted the company’s orphan drug designation request ... second orphan drug designation granted by the FDA. , Spinocerebellar ataxia is ...
(Date:5/23/2016)... ... May 23, 2016 , ... The need for blood donations in South Texas and across the ... Texas Blood & Tissue Center, blood donations are on the decline. In fact, donations across ... down 21 percent in South Texas in the last four years alone. , There is ...
(Date:5/23/2016)... ... May 23, 2016 , ... RoviSys, a ... based in Aurora, Ohio, has broken ground on a new building in Holly ... Park area, this new location solidifies a commitment to business in the region. ...
Breaking Biology Technology:
Cached News: