Navigation Links
Naming evolution's winners and losers
Date:7/29/2009

million years old yet have diversified into only 23 species, Alfaro said. They are diversifying a staggering 1,000 times slower than would have been expected. "Their species richness is so low, given how old they are," he said.

The tuatara, which lives in New Zealand and resembles lizards although it is actually a distant cousin has only two species. "In the same period of time that produced more than 8,000 species of snakes and lizards, there were only two species of tuatara," Alfaro said.

Why are there not thousands of species of tuataras?

"That is one of the big mysteries about biodiversity," Alfaro said. "Why these evolutionary losers are still around is a very hard thing to explain. They have been drawing inside straights for hundreds of millions of years. It's a real mystery to biologists how there can be any tuataras, given their low rate of speciation. They must have something working for them that has allowed them to persist. In species richness, these are losers, but in another sense, this highlights how unique they are. There are incredibly disparate patterns of species richness."

Tuataras were a bit more diverse in their heyday; there may have been a few dozen species of them, most of which have become extinct, Alfaro said.

In contrast, there are more than 9,000 bird species, more than 5,400 mammal species, approximately 5,500 frog species, some 3,000 snake species and 5,200 lizard species, Alfaro said.

The number of frog species, although it sounds high, is about what Alfaro would expect, given how old they are approximately 250 million years old.

"Our analysis suggests we should not be surprised to see a group with that many species in that amount of time," Alfaro said.

There are almost 60,000 species of jawed vertebrates. Alfaro and his colleagues report evidence for exceptional diversification rates in nine taxonomic groups of jawed vertebrates. Interes
'/>"/>

Contact: Stuart Wolpert
swolpert@support.ucla.edu
310-206-0511
University of California - Los Angeles
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. UFs new owl butterfly species naming rights auctioned for $40,800
2. UF to auction naming rights for new butterfly species online
3. Supply-Chain Council Announces Winners of 2009 Supply Chain Excellence Awards
4. ChloroFilms announces video contest winners
5. Winners announced in the Elsevier Grand Challenge
6. EPAs P3 award winners celebrate a green future
7. Winners of Tyler environmental prize announced
8. Merck and AAAS announce 2009 winners of outstanding undergraduate research programs
9. Elsevier announces winners of 3rd Annual Scopus Young Indian Scientist Award
10. The 2009 AAAS/Science dance contest winners are announced
11. GSA congratulates 2008 award winners
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:3/23/2015)... 23, 2015  In the 2014 fiscal year, irs.gov ... losses. This figure accounts for a fraction of the ... Nilson Report, exceeds $11 billion globally. The polygraph has ... crime has occurred. Investor Mark Saint Juste ... Joe Paolella partnered to administer the test in ...
(Date:3/20/2015)... --Research and Markets ( http://www.researchandmarkets.com/research/4stcg3/india_sensors ) ... Sensors Market Forecast and Opportunities 2020" report ... is projected to grow at a CAGR over ... industrial and healthcare sectors are the key application ... adoption of MEMS technology in sensors is growing ...
(Date:3/20/2015)... March 20, 2015 NXT-ID, Inc. (NASDAQ: ... company focused on the growing mobile commerce market, announces ... one of the products featured in 2015 "I Want ... 11:00 PM EST on the DIY Network.   ... Las Vegas , site of the 2015 International ...
Breaking Biology News(10 mins):Polygraph Test Now Used to Protect Investors From Fraud 2Polygraph Test Now Used to Protect Investors From Fraud 3India Sensors Market Forecast and Opportunities 2020 - STMicroelectronics held the largest share in 2014 2India Sensors Market Forecast and Opportunities 2020 - STMicroelectronics held the largest share in 2014 3NXT-ID's Wocket Biometric Smart Wallet to Air on "I Want That" International CES Special 2NXT-ID's Wocket Biometric Smart Wallet to Air on "I Want That" International CES Special 3
... that bigger, stronger, faster organisms have a distinct advantage ... a given community. But new research from the ... organisms increase their chances of survival if they evolve ... as well, a sort of "survival of the weakest." ...
... premier cancer congress: The 2011 European Multidisciplinary Cancer ... 2011 European Multidisciplinary Cancer Congress will take place ... ( www.stofair.se ) from Friday 23 September to ... build on the success of the previous ECCO ...
... a collection of test tubes in her Iowa State University ... were holding very weak coffee. That meant microorganisms in ... sugars into hydrocarbons, said Jarboe, an Iowa State assistant professor ... sugars in those test tubes were produced by the fast ...
Cached Biology News:Bacteria develop restraint for survival in a rock-paper-scissors community 2European Multidisciplinary Cancer Congress 2011 2Iowa State hybrid lab combines technologies to make biorenewable fuels and products 2Iowa State hybrid lab combines technologies to make biorenewable fuels and products 3
(Date:5/6/2015)... 6, 2015  Endo International plc (NASDAQ: ENDP ) ... President and CEO, will present a corporate overview at the ... on Wednesday, May 20, 2015 at 11:00 a.m. ... for the event will be available on the Company,s website ... the link to the event. Participants should allow approximately 10 ...
(Date:5/6/2015)... -- Northwest Biotherapeutics (NASDAQ: NWBO) ("NW Bio"), a U.S. biotechnology company ... announced that Linda Powers , NW Bio CEO, will present ... for solid tumor cancers and the Company,s multiple clinical programs ... , , , DATE: , , , Thursday, May ... , 12:15 PM EDT , , , , LINK: ...
(Date:5/6/2015)... Histogen, Inc., a regenerative medicine company ... grown under simulated embryonic conditions, will present new ... melanoma during the 2015 Society of Investigative Dermatology ... in Atlanta, GA. , Histogen has previously shown ... with anti-oncologic properties, with potential benefit in the ...
(Date:5/5/2015)... May 5, 2015  Blueprint Medicines (NASDAQ: ... initial public offering of 9,367,708 shares of common ... per share, including shares of common stock issued ... their option to purchase additional shares. The gross ... Medicines were approximately $168.6 million, before underwriting discounts and ...
Breaking Biology Technology:NW Bio To Webcast, Live, at VirtualInvestorConferences.com On May 7 2NW Bio To Webcast, Live, at VirtualInvestorConferences.com On May 7 3Novel Immunomodulatory Treatment Induces Apoptosis in Melanoma 2Blueprint Medicines Announces Closing of Initial Public Offering 2
... UPPSALA, Sweden, May 25 Beactica AB, the ... has entered,into an agreement with Cubist Pharmaceuticals, Inc. ... agreement, Beactica will use its Sprint(TM) surface plasmon,resonance ... pathogenic bacteria of interest to Cubist. Financial terms ...
... further promote young researchers in Germany, the Deutsche ... new Research Training Groups. This has just been ... DFG in Bonn. The new Research Training Groups ... doctorates in a structured research and qualification programme ...
... OMAHA, Neb., May 22 Transgenomic, Inc. (OTC Bulletin ... Schuh, Ph.D. and Michael B. McNulty to its Board ... Executive Officer of Sorrento Therapeutics, Inc. (STI). STI ... antibody library construction technology, the STI technology, which applies ...
Cached Biology Technology:DFG establishes 14 new research training groups 2DFG establishes 14 new research training groups 3DFG establishes 14 new research training groups 4DFG establishes 14 new research training groups 5DFG establishes 14 new research training groups 6DFG establishes 14 new research training groups 7Transgenomic, Inc. Announces Appointment of New Board Members 2Transgenomic, Inc. Announces Appointment of New Board Members 3
... Cloning Kits are designed to speed up the ... PCR products, regardless of sequence or type of ... including those that are difficult to clone by ... unstable or code for potentially detrimental proteins can ...
Size & Applications: 20 ml Storage Temp.: -20C Shelf Life: 12 months ...
PCR System for increased fidelity, yield and length of PCR products. Amplifies targets up to 10 kb from human genomic DNA....
Immunogen: Heat inactivated bacterial cells of Salmonella enteriditis,paratyphi and typhimurium Storage: 4 C...
Biology Products: