Featured Research

from universities, journals, and other organizations

Fossil Tooth Remains Of Extinct Rodent Species Discovered: Oldest Find Within This Genus

Date:
August 6, 2009
Source:
Plataforma SINC
Summary:
Scientists have discovered an extinct rodent species, based on fossil tooth remains found in Alborache, Valencia. Eomyops noeliae, from the Eomyidae family, represents the oldest find within this genus in the world.

Incisor tooth fossil of extinct rodent, Eomyops noeliae.
Credit: Francisco Javier Ruiz-Sánchez et al.

An international team of scientists has discovered an extinct rodent species, based on fossil tooth remains found in Alborache, Valencia. Eomyops noeliae, from the Eomyidae family, represents the oldest find within this genus in the world.

The small number of fossils found has prevented the scientists from the University of Valencia (UV), who have led this research study, from being able to gain a full picture of this "new" rodent. However, they have been able to prove - on the basis of just the teeth, the only fossil remains discovered - that Eomyops noeliae was morphologically and biometrically different from other rodents of the Eomyops genus. The new species provides valuable evolutionary, biostratigraphic and paleoenvironmental information related to this rodent, which was of average size within the group.

"Until now, the Eomyops genus was made up of a group of small species and one large one, but no intermediately-sized kinds such as Eomyops noeliae had been found", Francisco Javier Ruiz-Sánchez, lead author of the study published in the French journal Comptes Rendus Palevol and a researcher in the UV's Department of Geology, says.

The palaeontologists have also confirmed the age of the find. "The fossils found in the Morteral 20A deposit in Valencia show that this is the oldest species within the genus known in the world with absolute certainty", points out Ruiz-Sánchez. According to this data, Eomyops noeliae would have lived during the Aragonese period "perhaps between the Lower and Middle Miocene (around 16 million years ago)", underscores the researcher.

The rodent's wet environment

The varied fauna of micro-mammals and the new species found in the Valencian deposit provide information about the environmental conditions in which these animals would have lived at the time. "The rodent taxa found show evidence that the environment was very wet", says Ruiz-Sánchez, even though the full study on all the fossil rodent remains, begun with this new eomyid, has still not been completed.

According to the study, the environment was "relatively thickly wooded, and the climate was wet", although other factors such as temperature have not yet been defined.

The biogeographical data also show that Eomyops noeliae lived throughout the east of the Iberian Peninsula during the Lower-Middle Miocene. This has been confirmed from the Eomyops species remains excavated from the "most recent" Morteral 22 deposit, which is very close to Morteral 20A.

Ruiz-Sánchez says the finds of this species' teeth in deposit strata separated by just a few metres show that "how this species survived in the east of the peninsula over a specific time period that is currently hard to define, but which must have gone on for several tens of thousands of years".


Story Source:

The above story is based on materials provided by Plataforma SINC. Note: Materials may be edited for content and length.


Journal Reference:

  1. Ruiz-Sánchez et al. Eomyops noeliae sp. nov., a new Eomyidae (Mammalia, Rodentia) from the Aragonian of Spain. Comptes Rendus Palevol, 2009; 8 (4): 375 DOI: 10.1016/j.crpv.2008.12.002

Cite This Page:

Plataforma SINC. "Fossil Tooth Remains Of Extinct Rodent Species Discovered: Oldest Find Within This Genus." ScienceDaily. ScienceDaily, 6 August 2009. <www.sciencedaily.com/releases/2009/07/090728083707.htm>.
Plataforma SINC. (2009, August 6). Fossil Tooth Remains Of Extinct Rodent Species Discovered: Oldest Find Within This Genus. ScienceDaily. Retrieved July 30, 2014 from www.sciencedaily.com/releases/2009/07/090728083707.htm
Plataforma SINC. "Fossil Tooth Remains Of Extinct Rodent Species Discovered: Oldest Find Within This Genus." ScienceDaily. www.sciencedaily.com/releases/2009/07/090728083707.htm (accessed July 30, 2014).

Share This




More Plants & Animals News

Wednesday, July 30, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Raw: Otters Enjoy Water Slides at Japan Zoo

Raw: Otters Enjoy Water Slides at Japan Zoo

AP (July 30, 2014) — River otters were hitting the water slides to beat the summer heatwave on Wednesday at Ichikawa City's Zoological and Botanical Garden. (July 30) Video provided by AP
Powered by NewsLook.com
In Virginia, the Rise of a New Space Coast

In Virginia, the Rise of a New Space Coast

AP (July 30, 2014) — Every summer, tourists make the pilgrimage to Chincoteague Island, Va. to see wild ponies cross the Assateague Channel. But, it's the rockets sending to supplies to the International Space Station that are making this a year-round destination. (July 30) Video provided by AP
Powered by NewsLook.com
Rodents Rampant in Gardens Around Louvre

Rodents Rampant in Gardens Around Louvre

AP (July 29, 2014) — Food scraps and other items left on the grounds by picnickers brings unwelcome visitors to the grounds of the world famous and popular Louvre Museum in Paris. (July 29) Video provided by AP
Powered by NewsLook.com
Jane Goodall Warns Great Apes Face Extinction

Jane Goodall Warns Great Apes Face Extinction

AFP (July 29, 2014) — The world's great apes face extinction within decades, renowned chimpanzee expert Jane Goodall warned Tuesday in a call to arms to ensure man's closest relatives are not wiped out. Duration: 00:58 Video provided by AFP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
 
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:  

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:  

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile iPhone Android Web
Follow Facebook Twitter Google+
Subscribe RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins