casielles

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All this started when Concavenator was described. Surprisingly, it's ulna showed apparent quill knobs, this finding was taken with excepticism, let´s remember that Concavenator was discovered before Yutyrannus and Kulindadromeous, and that at that time, we only knew about wings and protowings in pennaraptorans, and therefore, no one expected quill knobs in an allosauroidean. So, alternative hypotheses about the bumps began; the strongest one being that they are ulnar muscle scars. However, this claim was later proven wrong; so it seems likely that allosauroideans had actually protowings.And here is where the meme begins; since Concavenator...