Navigation Links
Early whales gave birth on land, fossil find reveals
Date:2/3/2009

ANN ARBOR, Mich.---Two newly described fossil whales---a pregnant female and a male of the same species--reveal how primitive whales gave birth and provide new insights into how whales made the transition from land to sea.

The 47.5 million-year-old fossils, discovered in Pakistan in 2000 and 2004 and studied at the University of Michigan, are described in a paper published Feb. 4 in the online journal PLoS.

U-M paleontologist Philip Gingerich, who led the team that made the discoveries, was at first perplexed by the assortment of adult female and fetal bones found together. "When I first saw the small teeth in the field, I thought we were dealing with a small adult whale, but then we continued to expose the specimen and found ribs that seemed too large to go with those teeth," he said. "By the end of the day, I realized we had found a female whale with a fetus."

In fact, it is the first discovery of a fetal skeleton of an extinct whale in the group known as Archaeoceti, and the find represents a new species dubbed Maiacetus inuus. (Maiacetus means "mother whale," and Inuus was a Roman fertility god.) The fetus is positioned for head-first delivery, like land mammals but unlike modern whales, indicating that these whales still gave birth on land.

Another clue to the whales' lifestyle is the well-developed set of teeth in the fetus, suggesting that Maiacetus newborns were equipped to fend for themselves, rather than being helpless in early life.

The 8.5-foot-long male specimen, collected four years later from the same fossil beds, shares characteristic anatomical features with the female of the species, but its virtually complete skeleton is 12 percent larger overall, and its canine teeth or fangs 20 percent larger. Such size discrepancies are not uncommon among whales and their kin; in some species the females are larger, while in others the males are slightly to considerably bigger. The size difference of ma
'/>"/>

Contact: Nancy Ross-Flanigan
rossflan@umich.edu
734-647-1853
University of Michigan
Source:Eurekalert

Page: 1 2

Related biology news :

1. 60 second test could help early diagnosis of common brain diseases
2. Restless legs syndrome affects nearly 2 percent of US/UK children
3. Bleeding, not inflammation, is major cause of early lung infection death
4. Pig study sheds new light on the colonisation of Europe by early farmers
5. Color contrast is seen by the brain early doors
6. Extra gene copies were enough to make early humans mouths water
7. Was ability to run early mans Achilles heel?
8. New technique can be breakthrough for early cancer diagnosis
9. Yam bean a nearly forgotten crop
10. NIH awards nearly $23M to University of Chicago for translational research
11. Yam bean a nearly forgotten crop
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:12/24/2014)... Dec. 23, 2014  Since its launch in December 2014, ... people to eliminate the pain of trying to remember ... with their own biometrics fused to their smartphones. To ... passwords, Hoyos Labs , the company that created ... it is offering the app for free. ...
(Date:12/22/2014)... 22, 2014  NXT-ID, Inc. (NASDAQ: NXTD ... authentication company focused on the growing mobile commerce market, ... consultant, Apollo Robbins for the 2015 International ... Apollo Robbins will be at ... 2015, demonstrating some of his famous theft techniques to ...
(Date:12/22/2014)... , Dec. 22, 2014 Research ... has announced the addition of the ... report to their offering. ... insight provides an overview of the global ... aims to control and monitor piracy by ...
Breaking Biology News(10 mins):1U Offers Best Solution to the Username / Password Dilemma: For FREE! 21U Offers Best Solution to the Username / Password Dilemma: For FREE! 3NXT-ID Hires Master Pickpocket and Security Consultant Apollo Robbins for Wocket Smart Wallet CES 2015 Debut 2NXT-ID Hires Master Pickpocket and Security Consultant Apollo Robbins for Wocket Smart Wallet CES 2015 Debut 3NXT-ID Hires Master Pickpocket and Security Consultant Apollo Robbins for Wocket Smart Wallet CES 2015 Debut 4The Global Watermarking and Fingerprinting Markets 2
... Nature Medicine describes how different types of immune system ... bone and tissue, bringing into sharp focus the importance ... regeneration. The study, conducted at the Center for ... of USC, examined how mice with genetic bone defects ...
... it appears as a speck of blood in the sky, the ... the point of view of life as we know it, that,s ... Planet,s thin atmosphere does little to shield the ground against radiation ... the soil. Liquid water, a necessity for life, can,t exist for ...
... This press release is available in German ... are built up from only twenty amino acids. 25 years ... years ago a 22nd, the pyrrolysine. However, how the cell ... at the Technische Universitaet Muenchen have elucidated the structure of ...
Cached Biology News:New NASA missions to investigate how Mars turned hostile 2New NASA missions to investigate how Mars turned hostile 3New NASA missions to investigate how Mars turned hostile 4Enzymatic synthesis of pyrrolysine, the mysterious 22nd amino acid 2Enzymatic synthesis of pyrrolysine, the mysterious 22nd amino acid 3
(Date:12/25/2014)... The report “Service Quality ... by Product Type & Provider Type - ... defines and segments the market with an ... , Browse 152 market data tables, 19 ... TOC on “Service Quality Management (SQM) and ...
(Date:12/24/2014)... SPRING, Md. , Dec. 24, 2014 /PRNewswire/ ... announced today that Medtronic, Inc. (NYSE: ... to the U.S. Food and Drug Administration (FDA) ... II implantable drug infusion system (including a newly ... ® (treprostinil) Injection delivered intravenously to patients ...
(Date:12/24/2014)... and NEW YORK , Dec. 24, ... a biopharmaceutical company advancing patient care in critical areas, ... 3,500,000 shares of common stock, and warrants to purchase ... at an offering price of $4.00 per share and ... exercise price of $5.00, are exercisable immediately, and expire ...
(Date:12/24/2014)... , Dec. 24, 2014  Vermillion, Inc. ... on gynecologic disease, announced today that the Company ... including Oracle Investment Management, Jack W. Schuler ... Total proceeds were $10.5 million, before offering expenses.  ... and general corporate purposes. Under the ...
Breaking Biology Technology:Service Quality Management Market worth $2.1 Billion & Telco Customer Experience Management Market worth $2.3 Billion by 2019 – New Report by MarketsandMarkets 2Service Quality Management Market worth $2.1 Billion & Telco Customer Experience Management Market worth $2.3 Billion by 2019 – New Report by MarketsandMarkets 3Service Quality Management Market worth $2.1 Billion & Telco Customer Experience Management Market worth $2.3 Billion by 2019 – New Report by MarketsandMarkets 4United Therapeutics Announces Submission Of Pre-Market Approval Application For Implantable Drug Infusion System To Deliver Remodulin 2United Therapeutics Announces Submission Of Pre-Market Approval Application For Implantable Drug Infusion System To Deliver Remodulin 3United Therapeutics Announces Submission Of Pre-Market Approval Application For Implantable Drug Infusion System To Deliver Remodulin 4PlasmaTech Biopharmaceuticals, Inc. Announces Closing of Public Offering 2PlasmaTech Biopharmaceuticals, Inc. Announces Closing of Public Offering 3Vermillion Announces Closing of Equity Financing 2Vermillion Announces Closing of Equity Financing 3
... and Grocery Delivery Service Initiates ... Biodiesel Use in Delivery Fleet, LONG ISLAND CITY, ... food purveyors and delivery services, today,announced that it has signed a ... early January of 2008,FreshDirect,s fleet of 150 delivery trucks will start ...
... 17 In its second annual young,investigators special issue, ... are making an impact early in their careers. The ... through the,eyes of some of the best and brightest ... areas of interest., The young investigators were nominated ...
... Ph.D., continues as Chief Technology Officer, MENLO ... development stage company commercializing a patented,proprietary sensor technology ... and consumer markets announced today that Robin C.,Stracey ... Executive Officer,effective December 17, 2007. He has also ...
Cached Biology Technology:FreshDirect's Fleet Goes Biodiesel 2FreshDirect's Fleet Goes Biodiesel 3Genome Technology Magazine Names Top Young Investigators of 2007 2Robin C. Stracey Joins Cantimer, Inc. as President and CEO 2
Anti Autotaxin /ENPP2 , - (Rabbit)...
Mouse polyclonal antibody to TNPO2 - transportin 2 (importin 3, karyopherin beta 2b)...
...
Mouse monoclonal antibody to ALAS2 - aminolevulinate, delta-, synthase 2 (sideroblastic/hypochromic anemia)...
Biology Products: