User blog comment:Kogath/Monster Hunter 4 Ultimate for the Nintendo 3DS/@comment-5805144-20141018020029/@comment-4212769-20141018173822

Actually it could just be that Diablos, Gravios and Monoblos can grow very big but normally die before they do so, such old and big ones are very rare and Daimyo Hermitaur or Shogun Ceanataur goes for these big skulls. While we can explain Shogun Ceanataur for having other shells how these rare huge Gravios are enough to equip Shoguns, Daimyos only wear Blos shells.

We have also a big inconsistency. And that's Diablos and especially Monoblos are already very rare. So how can a really tiny amount of Monoblos that grow that big equip a relatively big amount of Daimyo Hermitaurs (beside answering with "Capcom can't calculate.")?

Now we know that Monoblos and Diablos are about three times bigger than the average Daimyo. But this gets corrupted with the Blos' tail, meaning we have to calculate about only double as big as Daimyo. The head is if you look at it just as big as Daimyo. That means that there have to be up to 10 meter long Monoblos/Diablos skulls. And that would mean the head needs to be bigger than the body of Monoblos or Diablos to support that. Well... they aren't.

If you look at the main body-head-ratio of Monoblos and Diablos the head is about 40% while the body is 60% about the whole length minus tail. The tail is about 50% of the whole body length.so we can just halve the whole body length. The biggest gold crown Monoblos is 29-30m long (I take 30) means head and main body are together 15m long. 40% of 15m are 6m. So the biggest head of the Monoblos we hunted is 6m long.

A 10m head would mean the body length without tail is 25m and with tail incredible 50m. So we have to assume, that if the skulls are real on Daimyo's back there have to be 50m long Monoblos (we probably aren't allowed to hunt). But damn, it's just that Monoblos are one of the rarest Wyvern at all. Such big Monoblos should be about 1% of the whole Monoblos population. That would make it very unprobable for Monoblos being the source of Daimyo's skulls especially if you keep in mind Daimyo's can be up to 15m long needing the skull in the same length. And that would mean... 65m long Monoblos! OMG, they become giants!

Well, if it can't be a Monoblos skull... where do they get these Monoblos-shaped shells? One possibility is already mentioned before in this thread. Rocks that they shape like a Monoblos skull... but well... How should they? Unless there are rocks that already have the shape lying around it doesn't make sense as Daimyo's can hardly shape rocks like that.

So, while the rock theory is out of the way lets look at other theories...


 * 1) Ancient monsters that have Monoblos heads: Well, as you know some deserts were an ocean once and in this ocean they may have been some animals/monsters that have a Monoblos head and are bigger. The first question is: How can there be enough of these skulls to equip all Daimyos? Well, many may get reused so the number wouldn't be THAT high. But the most relevant question would be... How the hell does this thing have a head that looks to 100% identical to a Monoblos head? Even if it is Monoblos' ancestor it is very unlikely for it to have the completely same head structure. So this theory is not really plausible.
 * 2) Monoblos living long before Daimyo Hermitaur evolved. This theory (by DatAxe) includes having Monoblos a million of years ago (no accurate guess) grow bigger than today because of higher oxygen levels at that time. And this seems to be the most plausible idea having the structure of the ancient monsters theory combined with bigger actual Monoblos. While there is still information needed and some problems (like access to the skull) are still there, this idea makes a lot of sense. Also the population problem may be solved as there might be bigger populations in the past. Also as they get reused when not damaged there need to be much less skulls than when every Daimyo uses its own.
 * 3) Now my own theory: Daimyo Hermitaur uses its saliva to build a Monoblos skull. Yeah, I know that sounds weird but actual swallows in asia make nests out of their saliva (these nests are a delicacy in Hong Kong... no lie). With theses swallows I came to the idea, Daimyo could build the skull layer by layer and form it with its claws. An enzym in its saliva may cause the saliva by contact with a lot of air to harden. The question why it's a Monoblos skull is easy to be answered. Monoblos may not be top predators but they are aggressive, territorial herbivores that are avoided by many smaller monsters.

And these are the theories I know of. What do you say?