The bushy-tailed opossum, Glironia, has odd teeth
Figure 1. Gliornia venusta, the extant bushy opossum, in vivo.
” data-medium-file=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2024/08/glironia_venusta.jpeg?w=203″ data-large-file=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2024/08/glironia_venusta.jpeg?w=203″ tabindex=”0″ role=”button” class=”wp-image-88446 size-full” src=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2024/08/glironia_venusta.jpeg” alt=”Figure 1. Gliornia venusta, the extant bushy opossum, in vivo.” width=”203″ height=”248″ />
Figure 1. Gliornia venusta, the extant bushy-tailed opossum, in vivo, smaller than life size = 20 cm snout-vent length.
In all tetrapods
premaxillary teeth arise from the premaxilla. These are called incisors in mammals because they usually have a distinct shape, whatever that shape might be. Shapes and numbers vary.
The first tooth in the maxilla is the canine.
Typically it is cone-shaped and larger than the incisors. Following the canine are premolars and molars. Typically these are also shorter than the canine and have two+ tooth roots.
Extant Glironia is an exception.
Here (Fig 2) the canine, the first tooth in the maxilla (orange), is short and incisor shaped. The first of three premolars (blue) is large and sharp, like a typical canine. On the mandible the situation is similar and, therefore, just as odd. The LRT scores for premaxillary tooth counts and number of molars.
Figure 2. Glironia skull and tooth row (right, rotated).
” data-medium-file=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2024/08/glironia_venusta588-1.jpg?w=300″ data-large-file=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2024/08/glironia_venusta588-1.jpg?w=584″ tabindex=”0″ role=”button” class=”size-full wp-image-88444″ src=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2024/08/glironia_venusta588-1.jpg” alt=”Figure 2. Glironia skull and tooth row (right, rotated). ” width=”584″ height=”561″ />
Figure 2. Glironia skull and tooth row (right, rotated).
These are the ‘little things’
that were overlooked earlier and need to be repaired in order to score taxa correctly in the large reptile tree, (LRT, 2322 taxa) which has been updated AGAIN today.
The LRT will be updated again and again until the MPTs are reduced as much as possible. One MPT would be ideal, but may be unattainable.
Mistakes, like this one (Fig 2) are discovered every day.
When that stops happening, I’ll let you know.
Every day there is something to be learned. The tree topology is getting sturdier.
Glironia venusta
(Thomas 1912; snout-vent length 20cm) is the extant bushy-tailed opossum. It is nocturnal, arboreal, small and omnivorous. Here it nests with Late Jurassic Henkelotherium and Middle Jurassic Agilodocodon – and therefore probably had its own genesis in the Jurassic.Glironia lacks a marsupium (= pouch), by convergence with placentals, Descendant taxa, like Dromiciops, retain a pouch, so Glironia lost its pouch all by itself since the Jurassic.
References
Thomas O 1912. A new Genus of Opossums and a new Tuco-tuco. The Annals and Magazine of Natural History. Ser. 8. 9 (50): 239–241. doi:10.1080/00222931208693127
wiki/Glironia
Source: https://pterosaurheresies.wordpress.com/2024/08/29/the-bushy-tailed-opossum-glironia-has-odd-teeth/
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 Mushroom Nootropic
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.
![Report abuse](/img/report_abuse.png)