Middle Jurassic Krusatodon vs Late Cretaceous Asioryctes
Tiny Krusatodon,
represented by µCT scans of an adult and a juvenile (fig 1) from Middle Jurassic Scotland entered the large reptile tree in 2024 as a docodont monotreme.
Figure 1. Krusatodon skull from Paciroli et al. 2024. On the diagram colors changed to DGS standards.
” data-medium-file=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2025/11/krusatodon-skull588.jpg?w=265″ data-large-file=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2025/11/krusatodon-skull588.jpg?w=584″ class=”size-full wp-image-95135″ src=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2025/11/krusatodon-skull588.jpg” alt=”Figure 1. Krusatodon skull from Paciroli et al. 2024. On the diagram colors changed to DGS standards.” width=”584″ height=”661″ srcset=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2025/11/krusatodon-skull588.jpg?w=584&h=661 584w, https://pterosaurheresies.wordpress.com/wp-content/uploads/2025/11/krusatodon-skull588.jpg?w=132&h=150 132w, https://pterosaurheresies.wordpress.com/wp-content/uploads/2025/11/krusatodon-skull588.jpg?w=265&h=300 265w, https://pterosaurheresies.wordpress.com/wp-content/uploads/2025/11/krusatodon-skull588.jpg 588w” sizes=”(max-width: 584px) 100vw, 584px” />
Figure 1. Krusatodon skull from Paciroli et al. 2024. On the diagram colors changed to DGS standards. Note the double root on the large first premolar and the location of the canine as the first tooth in the maxilla, as in the diagram.
At the time I paid no attention
to the smaller canine vs the larger first premolar in Krusatodon (Figs 1, 2), a pattern found in Late Cretaceous Mongolia Asioryctes (Fig 2), traditionally considered a eutherian = placental.
Figure 2. µCT scan of Krusatodon recolored using standard DGS colors and slightly modified at the posterior cranium to more closely match the that of Asioryctes, shown to size and to scale. note the small canine vs first premolar and the same tooth counts and shapes in both taxa.
” data-medium-file=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2025/11/asioryctes-longrostrum-krusatodon588.jpg?w=128″ data-large-file=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2025/11/asioryctes-longrostrum-krusatodon588.jpg?w=439″ class=”size-full wp-image-95132″ src=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2025/11/asioryctes-longrostrum-krusatodon588.jpg” alt=”Figure 2. µCT scan of Krusatodon recolored using standard DGS colors and slightly modified at the posterior cranium to more closely match the that of Asioryctes, shown to size and to scale. note the small canine vs first premolar and the same tooth counts and shapes in both taxa. ” width=”584″ height=”1364″ srcset=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2025/11/asioryctes-longrostrum-krusatodon588.jpg?w=584&h=1364 584w, https://pterosaurheresies.wordpress.com/wp-content/uploads/2025/11/asioryctes-longrostrum-krusatodon588.jpg?w=64&h=150 64w, https://pterosaurheresies.wordpress.com/wp-content/uploads/2025/11/asioryctes-longrostrum-krusatodon588.jpg?w=128&h=300 128w, https://pterosaurheresies.wordpress.com/wp-content/uploads/2025/11/asioryctes-longrostrum-krusatodon588.jpg 588w” sizes=”(max-width: 584px) 100vw, 584px” />
Figure 2. µCT scan of Krusatodon recolored using standard DGS colors and slightly modified at the posterior cranium to more closely match the that of Asioryctes, shown to size and to scale. note the small canine vs first premolar and the same tooth counts and shapes in both taxa.
In the LRT
Asioryctes nests with marsupials derived from dasyurids and basal to didelphids. Krusatodon continues to nest with basal monotremes between Morganucodon + Sinodelphys and Agilidocodon + Henkelotherium.
Considering the earlier recovery of more than one placental clade in the LRT,
I was wondering if the new scores would create another origin for the Marsupialia.
That did not happen. But things have changed and will change in the LRT. We’ll see as time goes by.
Source: https://pterosaurheresies.wordpress.com/2025/11/11/middle-jurassic-krusatodon-vs-late-cretaceous-asioryctes/
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: | 1,747,700,802 |
| Stories: | 8,531,049 |
Whistler Blowers, Insiders
