In 1979, Yadagiri and Ayyasami depicted another stegosaur, Dravidosaurus blanfordi, from the marine Trichinopoly gathering of southern India. What is especially vital for this taxon is its age. Dravidosaurus was found in Coniacian residue. In the event that substantial, it broadens the worldly scope of Stegosauria to the late Cretaceous. Astoundingly, other Indian material, of late Maastrichtian age, recommends stegosaurs made due to the K-Pg.
The persistance of stegosaurs in a solitary locale, long after their vanishing wherever else, ought not be excused crazy. It would peak the pattern toward a contracting topographical reach. Plated dinosaurs seem to have disappeared first in North America and Europe, next in South America and Africa, and later in Asia. By the Aptian, the main unmistakable survivors were in China and Mongolia.
A phase or two later, even these districts were deprived of plated monsters. Obviously, the geological scope of stegosaurs contracted bit by bit. It appears to be conceivable that by late Cretaceous time, stegosaurs actually existed, though in a more modest region than any time in recent memory.
In 1996 Chatterjee and Rudra closed D. blanfordi was a nomen dubium. In 1991, the two analysts explored the holotype site and saw just plesiosaur remains. They additionally analyzed the example and tracked down no skull or plates, just disintegrated appendage and support components, potentially plesiosaurian.
Of course, the second version of THE DINOSAURIA recommended Dravidosaurus was a figment, comprising of plesiosarian and improved stegosaur components. Tyceratops – OnlyFans User
All the more as of late, Pereda-Suberbiola proposed D. blanfordi was substantial all things considered. He brought up that the first depiction contains two photos of a tooth like that of Kentrosaurus.
Furthermore, there are ten photographs of bones and dermal shield which don’t look like plesiosaur remains. (It wouldn’t be astounding assuming that a significant part of the first holotype vanished before Chatterjee saw it; Maidment et al. seen as substantially less than whatever the Wuerhosaurus type should incorporate.) Pereda-Suberbiola likewise noticed the revelation of a late Maastrichtian example, including a plate, and a pes print of a similar age looking like Deltapodus, the stegosaur track. The last option find might be especially critical. Bones and teeth may be revised yet a pes print can’t be.
Galton described it as a little stegosaur with a proportionately little skull. Among stegosaurs, there was a developmental pattern toward longer necks, coming full circle in Miragaia. The last’s skull is obscure yet was apparently little, as the more drawn out the neck turned into the more modest the skull it could uphold. A minor skull seems reliable with a late making due, determined stegosaur like Dravidosaurus.
The osteoderms (or plates) of D. blanfordi are huge and three-sided with thick bases. Maybe they made up for little size by causing the creature to show up more impressive.
Curiously, Galton likewise referenced a tail spike with a particularly extended center district. It might have developed to oppose breakage during battle. Obscure in other taxa, the built up spike likewise proposes an exceptionally determined stegosaur, which had additional opportunity to develop in some ways.
On the off chance that Dravidosaurus was genuine, a basic inquiry emerges. For what reason did stegosaurs endure significantly longer in India than wherever else? Most likely, D. blanfordi, if substantial, empowers us to test annihilation speculations.
A stegosaurian presence in India, post Cenomanian, contends against a highstand as a reason for eradication. India was a long way from the biggest expanse of land. There is not a glaringly obvious explanation to believe its fauna was insusceptible with the impacts of higher ocean levels. Reduced living space might make sense of dwarfism in the last stegosaurs however it clearly didn’t clear them out.
The basic contrast among India and other Cretaceous bodies of land was the overall detachment of the subcontinent. Assuming Indian stegosaurs endure longer it was without a doubt since they, similar to the tuatara, were protected from outside dangers. Probably, India was the last asylum for stegosaurs. There, plated monsters were protected from new contenders, hunters and vegetation, which demonstrated so unfriendly in different districts.
A concentrate by Steward et al. proposes the spread of angiosperms dislodged cycadophyte and other vegetation liked by stegosaurs, subsequently hurrying their downfall. In the event that botanical change was an element, it is potential India was less impacted because of restricted admittance for angiosperms.
New contenders might well have been a more serious danger. Two clades-ornithopods and reinforced dinosaurs-may have dominated stegosaurs in a contest for low program specialties. Stegosaurs existed together with ornithopods and ankylosaurs in the Morrison. Be that as it may, the test introduced by ornithopods, especially, may have deteriorated considerably in the Cretaceous. Iguandonts and hadrosauroids multiplied and accomplished bigger size.
It is important that, in sharp difference to the Morrison, stegosaur bearing units of Cretaceous age are perpetually without any trace of ornithopods. This is valid for the Lianmuqin, the La Amarga, the Ejinhoro, the Kirkwood and the Piedrahita de Muno. Khukhtekian units are likewise educational. At Khamryn Khural, where ornithopods happen, stegosaurs have not been accounted for. At Khamryn Us, where stegosaurs are known, ornithopods are not. Clearly, early Cretaceous stegosaurs could endure where iguanodonts were missing. By Cenomanian time, India was the main such spot. Other than multiplying in northern areas, ornithopods, including hadrosaurs, transmitted into South America, Africa and even Antarctica. It appears to be plated dinosaurs could hold out just in India, which stayed liberated from ornithopods as far as possible.
Yet, ornithopod radiations might have been to a lesser degree a reason than an impact of stegosaur decline. They likewise confronted the danger of hunters.
Valid, Jurassic stegosaurs endured theropods from the hour of Huayangosaurus to that of Stegosaurus. The last option is known to have repulsed Allosaurus. The fact that Kentrosaurus made due close by Veterupristisaurus makes it also essential. Like the top hunters of the early Cretaceous, V. milneri was a carcharodontosaur, yet stegosaurs outlived it. Be that as it may, similarly as there is proof for expanded ornithopod contest in the Cretaceous, there is likewise proof for an elevated ruthless risk.
The early Cretaceous carcharodontosaurs Concavenator and Eocarcharia varied from Veterupristisaurus in two significant regards. They might have been gregarious consequently pack trackers, and were adjusted to chase ornithischians not large sauropods. Of course, stegosaurs were at that point missing in their surroundings.
Stegosaur development might give the most telling proof. With its moderately short appendages and widened pelvis, Wuerhosaurus had become more nodosaur-like. The benefit of a lower, ankylosaur-type profile was that the sides and paunch were less presented to assault. Obviously the stegosaurian protection was coming up short; endurance required imitating ankylosaurs. However the last option normally enjoyed the benefit, and multiplied after the stegosaurian death..
Clearly carcharodontosaurs had accomplished something Allosaurus never did; they had subverted the stegosaurian bauplan, and maybe the clade, wherever they went. Furthermore, carcharodontosaurs transmitted far, into practically all expanses of land. It might offer something that stegosaurs endured longest where carcharodontosaurs were missing. The deadliest of the shark toothed trackers never arrived at India. Titanosaur-hunting abelisaurs remained its top hunters.
Suberbiola ought to be heeded.The Dravidosaurus material ought to be rethought and reevaluated. On the off chance that the reference to stegosauria is right, an investigation of Dravidosaurus’ paleoenvironment could give basic experiences into the reason(s) for its endurance and the previous death of its family members.
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