Bear origin and evolution in the LRT
Mclellan and Reiner 1994
reviewed bear evolution. They reported, most are extinct, 8 species remain. The also reported (plantigrade) bears evolved from (digitigrade) canids (= wolves) during the Late Oligocene.
Plantigrady from digitigrady? That sounds untenable on the face of it.
By contrast,
in the large reptile tree (LRT, 2340 taxa, subset Fig 1) bears currently evolved from extinct Ursavus, then Nasua the coatimundi, then Meles, the badger, then Arctodus ,the short-faced bear, then three taxa close to Mesocyon.
So at present in the LRT bears are big badgers, not big wolves.
In both competing studies Ursavus is a basal bear.
References
Mclellan and Reiner 1994. A review of bear evolution. Bears Their Biology and Management International Conference of Bear Res. and Management 9(1):85–96.
Mayr E 1986. Uncertainty in science: is the giant panda a bear or a raccoon? Nature. London 323:769–771.
Sarich V 1973. The giant panda is a bear. Nature. London. 245:218–220.
Source: https://pterosaurheresies.wordpress.com/2026/09/21/bear-origin-and-evolution-in-the-lrt/
Anyone can join.
Anyone can contribute.
Anyone can become informed about their world.
"United We Stand" Click Here To Create Your Personal Citizen Journalist Account Today, Be Sure To Invite Your Friends.
Before It’s News® is a community of individuals who report on what’s going on around them, from all around the world. Anyone can join. Anyone can contribute. Anyone can become informed about their world. "United We Stand" Click Here To Create Your Personal Citizen Journalist Account Today, Be Sure To Invite Your Friends.
LION'S MANE PRODUCT
Try Our Lion’s Mane WHOLE MIND Nootropic Blend 60 Capsules
Mushrooms are having a moment. One fabulous fungus in particular, lion’s mane, may help improve memory, depression and anxiety symptoms. They are also an excellent source of nutrients that show promise as a therapy for dementia, and other neurodegenerative diseases. If you’re living with anxiety or depression, you may be curious about all the therapy options out there — including the natural ones.Our Lion’s Mane WHOLE MIND Nootropic Blend has been formulated to utilize the potency of Lion’s mane but also include the benefits of four other Highly Beneficial Mushrooms. Synergistically, they work together to Build your health through improving cognitive function and immunity regardless of your age. Our Nootropic not only improves your Cognitive Function and Activates your Immune System, but it benefits growth of Essential Gut Flora, further enhancing your Vitality.
Our Formula includes: Lion’s Mane Mushrooms which Increase Brain Power through nerve growth, lessen anxiety, reduce depression, and improve concentration. Its an excellent adaptogen, promotes sleep and improves immunity. Shiitake Mushrooms which Fight cancer cells and infectious disease, boost the immune system, promotes brain function, and serves as a source of B vitamins. Maitake Mushrooms which regulate blood sugar levels of diabetics, reduce hypertension and boosts the immune system. Reishi Mushrooms which Fight inflammation, liver disease, fatigue, tumor growth and cancer. They Improve skin disorders and soothes digestive problems, stomach ulcers and leaky gut syndrome. Chaga Mushrooms which have anti-aging effects, boost immune function, improve stamina and athletic performance, even act as a natural aphrodisiac, fighting diabetes and improving liver function. Try Our Lion’s Mane WHOLE MIND Nootropic Blend 60 Capsules Today. Be 100% Satisfied or Receive a Full Money Back Guarantee. Order Yours Today by Following This Link.
| Visits: | 1,832,641,198 |
| Stories: | 8,708,577 |
Whistler Blowers, Insiders
