* . *
  • About
  • Advertise
  • Privacy & Policy
  • Contact
Wednesday, June 4, 2025
Earth-News
  • Home
  • Business
  • Entertainment
    Author Richard Russo Will Speak At Sandwich Town Hall – CapeNews.net

    Join Us for an Inspiring Evening with Author Richard Russo at Sandwich Town Hall!

    Entertainment Partners Acquires CASHét, Digital Payments Vendor for Productions – Variety

    Entertainment Partners Acquires CASHét, Digital Payments Vendor for Productions – Variety

    Salem’s Harborwalk Garden Cultivates Community with Entertainment, Food, and Events – 105.7 WROR

    Discover the Vibrant Community Spirit at Salem’s Harborwalk Garden: A Hub for Entertainment, Food, and Fun!

    Entertainment-Focused Narrative and Culture Change Practice – New America

    Transforming Culture Through Engaging Entertainment Narratives

    Rising stars: Young classical musicians surging on social media – Yahoo

    Meet the Next Generation of Classical Music Sensations Making Waves on Social Media!

    Devin Harjes Dies: ‘Manifest’ & ‘Boardwalk Empire’ Actor Was 41 – WyomingNews.com

    Tragic Loss: Devin Harjes, Star of ‘Manifest’ and ‘Boardwalk Empire,’ Passes Away at 41

  • General
  • Health
  • News

    Cracking the Code: Why China’s Economic Challenges Aren’t Shaking Markets, Unlike America’s” – Bloomberg

    Trump’s Narrow Window to Spread the Truth About Harris

    Trump’s Narrow Window to Spread the Truth About Harris

    Israel-Gaza war live updates: Hamas leader Ismail Haniyeh assassinated in Iran, group says

    Israel-Gaza war live updates: Hamas leader Ismail Haniyeh assassinated in Iran, group says

    PAP Boss to Niger Delta Youths, Stay Away from the Protest

    PAP Boss to Niger Delta Youths, Stay Away from the Protest

    Court Restricts Protests In Lagos To Freedom, Peace Park

    Court Restricts Protests In Lagos To Freedom, Peace Park

    Fans React to Jazz Jennings’ Inspiring Weight Loss Journey

    Fans React to Jazz Jennings’ Inspiring Weight Loss Journey

    Trending Tags

    • Trump Inauguration
    • United Stated
    • White House
    • Market Stories
    • Election Results
  • Science
  • Sports
  • Technology
    Inside the tedious effort to tally AI’s energy appetite – MIT Technology Review

    Inside the tedious effort to tally AI’s energy appetite – MIT Technology Review

    Finland Set to Lead EU Quantum Technology Defense Project – IoT World Today

    Finland Set to Lead EU Quantum Technology Defense Project – IoT World Today

    AI for lawyers: Win back your time using technology – nationaljurist.com

    Reclaim Your Time: How AI is Transforming the Legal Profession

    Prosecutors accuse men of exporting U.S. military technology to China – Milwaukee Journal Sentinel

    Men Charged with Illegally Exporting U.S. Military Technology to China

    ROLAND’S NEW WIRELESS TRIGGER TECHNOLOGY, PORTER & DAVIES ON TOUR, NEW 64 AUDIO ASPIRE UNIVERSAL IEM MODELS, WAVES FREE PLUGIN PACK – Modern Drummer Magazine

    ROLAND’S NEW WIRELESS TRIGGER TECHNOLOGY, PORTER & DAVIES ON TOUR, NEW 64 AUDIO ASPIRE UNIVERSAL IEM MODELS, WAVES FREE PLUGIN PACK – Modern Drummer Magazine

    This giant microwave may change the future of war – MIT Technology Review

    Revolutionizing Warfare: The Impact of a Game-Changing Giant Microwave

    Trending Tags

    • Nintendo Switch
    • CES 2017
    • Playstation 4 Pro
    • Mark Zuckerberg
No Result
View All Result
  • Home
  • Business
  • Entertainment
    Author Richard Russo Will Speak At Sandwich Town Hall – CapeNews.net

    Join Us for an Inspiring Evening with Author Richard Russo at Sandwich Town Hall!

    Entertainment Partners Acquires CASHét, Digital Payments Vendor for Productions – Variety

    Entertainment Partners Acquires CASHét, Digital Payments Vendor for Productions – Variety

    Salem’s Harborwalk Garden Cultivates Community with Entertainment, Food, and Events – 105.7 WROR

    Discover the Vibrant Community Spirit at Salem’s Harborwalk Garden: A Hub for Entertainment, Food, and Fun!

    Entertainment-Focused Narrative and Culture Change Practice – New America

    Transforming Culture Through Engaging Entertainment Narratives

    Rising stars: Young classical musicians surging on social media – Yahoo

    Meet the Next Generation of Classical Music Sensations Making Waves on Social Media!

    Devin Harjes Dies: ‘Manifest’ & ‘Boardwalk Empire’ Actor Was 41 – WyomingNews.com

    Tragic Loss: Devin Harjes, Star of ‘Manifest’ and ‘Boardwalk Empire,’ Passes Away at 41

  • General
  • Health
  • News

    Cracking the Code: Why China’s Economic Challenges Aren’t Shaking Markets, Unlike America’s” – Bloomberg

    Trump’s Narrow Window to Spread the Truth About Harris

    Trump’s Narrow Window to Spread the Truth About Harris

    Israel-Gaza war live updates: Hamas leader Ismail Haniyeh assassinated in Iran, group says

    Israel-Gaza war live updates: Hamas leader Ismail Haniyeh assassinated in Iran, group says

    PAP Boss to Niger Delta Youths, Stay Away from the Protest

    PAP Boss to Niger Delta Youths, Stay Away from the Protest

    Court Restricts Protests In Lagos To Freedom, Peace Park

    Court Restricts Protests In Lagos To Freedom, Peace Park

    Fans React to Jazz Jennings’ Inspiring Weight Loss Journey

    Fans React to Jazz Jennings’ Inspiring Weight Loss Journey

    Trending Tags

    • Trump Inauguration
    • United Stated
    • White House
    • Market Stories
    • Election Results
  • Science
  • Sports
  • Technology
    Inside the tedious effort to tally AI’s energy appetite – MIT Technology Review

    Inside the tedious effort to tally AI’s energy appetite – MIT Technology Review

    Finland Set to Lead EU Quantum Technology Defense Project – IoT World Today

    Finland Set to Lead EU Quantum Technology Defense Project – IoT World Today

    AI for lawyers: Win back your time using technology – nationaljurist.com

    Reclaim Your Time: How AI is Transforming the Legal Profession

    Prosecutors accuse men of exporting U.S. military technology to China – Milwaukee Journal Sentinel

    Men Charged with Illegally Exporting U.S. Military Technology to China

    ROLAND’S NEW WIRELESS TRIGGER TECHNOLOGY, PORTER & DAVIES ON TOUR, NEW 64 AUDIO ASPIRE UNIVERSAL IEM MODELS, WAVES FREE PLUGIN PACK – Modern Drummer Magazine

    ROLAND’S NEW WIRELESS TRIGGER TECHNOLOGY, PORTER & DAVIES ON TOUR, NEW 64 AUDIO ASPIRE UNIVERSAL IEM MODELS, WAVES FREE PLUGIN PACK – Modern Drummer Magazine

    This giant microwave may change the future of war – MIT Technology Review

    Revolutionizing Warfare: The Impact of a Game-Changing Giant Microwave

    Trending Tags

    • Nintendo Switch
    • CES 2017
    • Playstation 4 Pro
    • Mark Zuckerberg
No Result
View All Result
Earth-News
No Result
View All Result
Home Science

Jurassic Revolution: New Fossils Redefine Mammalian Ancestry

April 7, 2024
in Science
Jurassic Revolution: New Fossils Redefine Mammalian Ancestry
Share on FacebookShare on Twitter

Reconstruction of Feredocodon chowi and Dianoconodon youngi

New research has unveiled significant Jurassic-era fossils, offering new insights into mammalian evolution and the development of the mammalian middle ear, challenging and expanding current understanding of mammal ancestry. Reconstruction of Feredocodon chowi (right) and Dianoconodon youngi (left). Credit: Chuang Zhao

Specimens from the Jurassic period found in China illuminate the evolution of teeth, jaws, and ears in mammals.

An international team of paleontologists led by the American Museum of Natural History and the Chinese Academy of Sciences has discovered new sets of fossils from the Jurassic period that provide fresh insights into the early evolution of mammals. The findings, detailed today in two back-to-back studies in the journal Nature, could change how scientists reconstruct the earliest branches in the mammalian tree of life.

The first paper focuses on shuotheriids, a family of mouse-sized mammals with molars that are different from those in any living mammal. The evolutionary position of these animals has been heavily debated, but they have been linked to the australosphenidans, the group that includes today’s monotremes—mammals that lay eggs, such as the platypus. Analyzing two newly discovered and well-preserved skeletal fossils of shuotheriids that lived between 168–164 million years ago in what is now Inner Mongolia, the researchers found that the molars of these animals were more like those of another extinct mammal group called the docodontans. They also determined that these two specimens belong to a new genus and species, which they named Feredocodon chowi.

Feredocodon chowi

Reconstruction of the newly described species Feredocodon chowi. Credit: Chuang Zhao

“When you look at the fossil record, both for mammals and many other sorts of animals, teeth are the part of the body that you are most likely to recover,” said Jin Meng, curator in the American Museum of Natural History’s Division of Paleontology and a corresponding author on both Nature papers along with Fangyuan Mao from the Chinese Academy of Sciences. “Yet since the 1980s, the perplexing tooth shape seen in shuotheriids has been a barrier to our efforts to understand early mammal evolution. These new specimens have allowed us to solve this longstanding problem.”

Evolution of the Mammalian Middle Ear

The second study, also led by Meng and Mao, is based on the fossil skulls of Feredocodon chowi as well as a second new species, named Dianoconodon youngi, which lived between 201–184 million years ago. In this study, the researchers looked at the structure of the middle ear, which gives modern mammals the sharpest hearing on Earth.

The modern mammalian middle ear, the area just inside the eardrum that turns vibrations in the air into ripples in the inner ear’s fluids, has three bones, or auditory ossicles—a feature that is unique to mammals. Reptiles and birds only have one middle-ear bone. Scientists know that during the early evolution of mammals from the group that includes lizards, crocodilians, and dinosaurs, bones formed the joints of the jaw were separated, and became associated with hearing. The newly described specimens provide convincing fossil evidence of this transition in action.

Dianoconodon youngi

Reconstruction of the newly described species Dianoconodon youngi. Credit: Chuang Zhao

The transition started from an ancestral animal that had a double jaw joint, a feature with the joint of a mammal on the outside and a reptilian joint on the inside. Analyses on the older fossil (Dianoconodon youngi) show that one of its two joints, the reptilian one, was starting to lose its ability to handle the forces created by chewing. The younger specimen (Feredocodon chowi) already had a middle ear of mammals formed and adapted exclusively for hearing.

“Scientists have been trying to understand how the mammalian middle ear evolved since Darwin’s time,” said Meng. “While paleontological discoveries have helped reveal the process during the last a few decades, these new fossils bring to light a critical missing link and enrich our understanding of the gradual evolution of the mammalian middle ear.”

References: “Jurassic shuotheriids show earliest dental diversification of mammaliaforms” by Fangyuan Mao, Zhiyu Li, Zhili Wang, Chi Zhang, Thomas Rich, Patricia Vickers-Rich and Jin Meng, 3 April 2024, Nature.
DOI: 10.1038/s41586-024-07258-7

“Fossils document evolutionary changes of jaw joint to mammalian middle ear” by Fangyuan Mao, Chi Zhang, Jicheng Ren, Tao Wang, Guofu Wang, Fakui Zhang, Thomas Rich, Patricia Vickers-Rich and Jin Meng, 3 April 2024, Nature.
DOI: 10.1038/s41586-024-07235-0

>>> Read full article>>>
Copyright for syndicated content belongs to the linked Source : SciTechDaily – https://scitechdaily.com/jurassic-revolution-new-fossils-redefine-mammalian-ancestry/

Tags: ‘Jurassicrevolutionscience
Previous Post

Japanese Scientists Unveil Game-Changing Material for Magnesium Batteries

Next Post

The Magnetic Twist: Hybrid Superconductors Unlock Quantum Computing Potential

Collective dynamical regimes predict invasion success and impacts in microbial communities – Nature

Collective dynamical regimes predict invasion success and impacts in microbial communities – Nature

June 4, 2025
John Brenkus, ‘Sport Science’ Host, Died By Suicide, Medical Examiner Says – TMZ

Tragic Loss: ‘Sport Science’ Host John Brenkus Passes Away in Heartbreaking Circumstances

June 4, 2025
Meghan to take a break from As ever as she announces next step for those ‘wondering and waiting’ – Nine – Honey

Meghan to take a break from As ever as she announces next step for those ‘wondering and waiting’ – Nine – Honey

June 4, 2025
Aeternum Update 1.3.27 – newworld.com

Exciting New Features and Enhancements in Aeternum Update 1.3.27!

June 4, 2025
Larry Kudlow: Liberal media has been ‘completely wrong’ on the Trump economy – Fox Business

Larry Kudlow: Liberal media has been ‘completely wrong’ on the Trump economy – Fox Business

June 4, 2025
Author Richard Russo Will Speak At Sandwich Town Hall – CapeNews.net

Join Us for an Inspiring Evening with Author Richard Russo at Sandwich Town Hall!

June 4, 2025
Hochul, Jeffries raise concerns over possible impacts of One Big Beautiful Bill Act – Spectrum News

Hochul, Jeffries raise concerns over possible impacts of One Big Beautiful Bill Act – Spectrum News

June 4, 2025
Inside the tedious effort to tally AI’s energy appetite – MIT Technology Review

Inside the tedious effort to tally AI’s energy appetite – MIT Technology Review

June 4, 2025
Kehoe calls special session on storm damage, KC sports teams – FOX 2

Kehoe Announces Special Session to Address Storm Damage and Support KC Sports Teams

June 3, 2025
From Eggs To Fingerlings, Wyoming Students Dive Into The World Of Fish Conservation – KGAB

From Eggs to Fingerlings: Wyoming Students Make Waves in Fish Conservation!

June 3, 2025

Categories

Archives

June 2025
MTWTFSS
 1
2345678
9101112131415
16171819202122
23242526272829
30 
« May    
Earth-News.info

The Earth News is an independent English-language daily published Website from all around the World News

Browse by Category

  • Business (20,132)
  • Ecology (664)
  • Economy (678)
  • Entertainment (21,584)
  • General (15,261)
  • Health (9,720)
  • Lifestyle (681)
  • News (22,149)
  • People (679)
  • Politics (687)
  • Science (15,898)
  • Sports (21,182)
  • Technology (15,664)
  • World (665)

Recent News

Collective dynamical regimes predict invasion success and impacts in microbial communities – Nature

Collective dynamical regimes predict invasion success and impacts in microbial communities – Nature

June 4, 2025
John Brenkus, ‘Sport Science’ Host, Died By Suicide, Medical Examiner Says – TMZ

Tragic Loss: ‘Sport Science’ Host John Brenkus Passes Away in Heartbreaking Circumstances

June 4, 2025
  • About
  • Advertise
  • Privacy & Policy
  • Contact

© 2023 earth-news.info

No Result
View All Result

© 2023 earth-news.info

No Result
View All Result

© 2023 earth-news.info

Go to mobile version