• HOME
  • NEWS
  • EXPLORE
    • CAREER
      • Companies
      • Jobs
    • EVENTS
    • iGEM
      • News
      • Team
    • PHOTOS
    • VIDEO
    • WIKI
  • BLOG
  • COMMUNITY
    • FACEBOOK
    • INSTAGRAM
    • TWITTER
Thursday, August 28, 2025
BIOENGINEER.ORG
No Result
View All Result
  • Login
  • HOME
  • NEWS
  • EXPLORE
    • CAREER
      • Companies
      • Jobs
        • Lecturer
        • PhD Studentship
        • Postdoc
        • Research Assistant
    • EVENTS
    • iGEM
      • News
      • Team
    • PHOTOS
    • VIDEO
    • WIKI
  • BLOG
  • COMMUNITY
    • FACEBOOK
    • INSTAGRAM
    • TWITTER
  • HOME
  • NEWS
  • EXPLORE
    • CAREER
      • Companies
      • Jobs
        • Lecturer
        • PhD Studentship
        • Postdoc
        • Research Assistant
    • EVENTS
    • iGEM
      • News
      • Team
    • PHOTOS
    • VIDEO
    • WIKI
  • BLOG
  • COMMUNITY
    • FACEBOOK
    • INSTAGRAM
    • TWITTER
No Result
View All Result
Bioengineer.org
No Result
View All Result
Home NEWS Science News Biology

Diego bows to ancestral sabretoothed mammal

Bioengineer by Bioengineer
October 13, 2022
in Biology
Reading Time: 3 mins read
0
Share on FacebookShare on TwitterShare on LinkedinShare on RedditShare on Telegram

Dogs, cats, and their close relatives — existing and extinct — are members of Carnivoramorpha, a group of mammals in which saber-like canines have evolved twice.

Earliest sabretoothed mammal discovered

Credit: KyotoU/Jim Melli (San Diego Natural History Museum)

Dogs, cats, and their close relatives — existing and extinct — are members of Carnivoramorpha, a group of mammals in which saber-like canines have evolved twice.

Sabertoothed nimravids were early members of Carnivoramorpha, but dogs and cats did not evolve from them.

“Our specimen has serrated slicing teeth which have important similarities to later predators. The teeth tell us that close relatives of today’s living carnivores spread around the world earlier than we believed, and they diversified quickly when they reached new continents like North America,” explains lead author Ashley Poust.

By roughly 40 million years ago, saber-like canines evolved in an ancestral nimravid. By about 16 million years ago, saber-like canines also evolved in an ancestor of a cat subfamily called Machairodontinae, which would give rise to the genus Smilodon about 2.5 million years ago.

“So the nimravids were the original sabretooth carnivores among Carnivoramorpha,” explains corresponding co-author Susumu Tomiya of Kyoto University’s CICASP.

Now, the team of researchers has re-identified a fossil specimen collected in San Diego in 1997. Earlier, based solely on a partial upper jaw with only two intact teeth and missing saber-like canines, the specimen was misidentified as a Hyaenodon, a separate group of carnivorous mammals.

Further morphological analysis of the tooth shapes, helped to determine that the specimen was one of the earliest nimravids dating back 37 to 40 million years.

“We are excited to honor Dr Naoko Egi, who has added so much to our knowledge of carnivore evolution, by renaming our find as Pangurban egiae,” Poust adds.

“The stressed tropical and subtropical ecosystems and movement of species 38 million years ago that resemble changes happening today may have driven the evolution and rise of hypercarnivorous carnivoramorphans, particularly the nimravids.”

The first nimravids possibly originated in Asia, and after migrating across vast land masses that are now today’s continents, inhabited western North America.

“The discovery of Pangurban egiae reminds us how quickly invasion and adaptation can occur and the large role it has played in the history of life,” concludes Poust.

###

The paper “An early nimravid from California and the rise of hypercarnivorous mammals after the middle Eocene climatic optimum” appeared on 12 October 2022 in Biology Letters with doi: 10.1098/rsbl.2022.0291 

KyotoU paper repository: http://hdl.handle.net/2433/276689

About Kyoto University

Kyoto University is one of Japan and Asia’s premier research institutions, founded in 1897 and responsible for producing numerous Nobel laureates and winners of other prestigious international prizes. A broad curriculum across the arts and sciences at both undergraduate and graduate levels is complemented by numerous research centers, as well as facilities and offices around Japan and the world. For more information, please see: http://www.kyoto-u.ac.jp/en



Journal

Biology Letters

DOI

10.1098/rsbl.2022.0291

Method of Research

Meta-analysis

Subject of Research

Animals

Article Title

An early nimravid from California and the rise of hypercarnivorous mammals after the middle Eocene climatic optimum

Article Publication Date

12-Oct-2022

COI Statement

The authors declare no competing interests.

Share12Tweet7Share2ShareShareShare1

Related Posts

Ferroptosis Links to Acute Kidney Disease Genes

Ferroptosis Links to Acute Kidney Disease Genes

August 28, 2025
Red Beet Gene Boosts Tuber Growth and Disease Resistance

Red Beet Gene Boosts Tuber Growth and Disease Resistance

August 28, 2025

VHL Inhibits Angiogenesis via HIF-1a in Macrophages

August 28, 2025

Trainer Insights on Canine Aggression and Behavior Solutions

August 27, 2025

POPULAR NEWS

  • blank

    Breakthrough in Computer Hardware Advances Solves Complex Optimization Challenges

    149 shares
    Share 60 Tweet 37
  • Molecules in Focus: Capturing the Timeless Dance of Particles

    142 shares
    Share 57 Tweet 36
  • New Drug Formulation Transforms Intravenous Treatments into Rapid Injections

    115 shares
    Share 46 Tweet 29
  • Neuropsychiatric Risks Linked to COVID-19 Revealed

    82 shares
    Share 33 Tweet 21

About

We bring you the latest biotechnology news from best research centers and universities around the world. Check our website.

Follow us

Recent News

Evaluating Web Video Support for Cardiac Patients

Amygdala Noise Boosts Exploration During Threat

AI Unveils IVIG-Resistant Kawasaki Disease in Shandong

  • Contact Us

Bioengineer.org © Copyright 2023 All Rights Reserved.

Welcome Back!

Login to your account below

Forgotten Password?

Retrieve your password

Please enter your username or email address to reset your password.

Log In
No Result
View All Result
  • Homepages
    • Home Page 1
    • Home Page 2
  • News
  • National
  • Business
  • Health
  • Lifestyle
  • Science

Bioengineer.org © Copyright 2023 All Rights Reserved.