Vjushkovia – at the base of the Rauisuchia and the Archosauria
Vjushkovia is considered an Early-Middle Triassic erythrosuchid and indeed it could be considered as such since it is a descendant of the erythrosuchids. In the large reptile tree Vjushkovia was more derived than erythrosuchids and Euparkeria, Riojasuchus and Ornithosuchus. It nested at the base of the Rauisuchia and this clade nested at the base of the Yarasuchus + Qianosuchus + Ticinosuchus and the highly armored Aetosauria. And these clades were basal to the Archosauria (crocs + dinos).
Figure 1. Vjushkovia. This largely overlooked taxon is an erythrosuchid descendant that was ancestral to the Rauisuchia, the Aetosauria and the Archosauria. Click to learn more.
Other than here, Vjushkovia has not gotten a lot of press. And that’s too bad considering its importance at the “crossroads” of the Archosauria and Rauisuchia. Wiki reports, “The ankle does not have the large calcaneal “heel” that characterizes those two clades [ornithosuchids and rauisuchids) and marks the origin of the Archosauria.” Not sure why they said this about the archosaur ankle, because the basal archosaur ankle is not enlarged. It does become enlarged by convergence in poposaur dinosaurs and in derived crocs, like Protosuchus.
All descendants of Vjushkovia have a longer pubis and ischium, (check out Decuriasuchus, for instance) so there is a likely transitional taxon that looks like Vjushkovia, but with a deeper pelvis that we haven’t found yet. This morphology also indicates a more erect set of hind limbs (again, like all of its descendant taxa). So at this point we’re taking the first tentative steps in the gradual accumulation of bipedal traits in derived taxa like basal crocs and basal dinosaurs.
I’d like to know more about Vjushkovia if any more data is available.
As always, I encourage readers to see specimens, make observations and come to your own conclusions. Test. Test. And test again.
Evidence and support in the form of nexus, pdf and jpeg files will be sent to all who request additional data.
References
Huene F von 1960. Ein grosser Pseudosuchier aus der Orenurger Trias. Palaeontographica Abteilung A 114:105-111
2012-12-03 20:02:24
Source:
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: | 1,708,017,101 |
| Stories: | 8,449,274 |
Whistler Blowers, Insiders
