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Re: Non-theropod dinosaurs and feathery/fluffy integument
<<Psittacosaurus specimens from Liaoning are covered in scales except for
the apparent quills on the tail, which are quite different-looking from
feathers, even if they are homologous.>>
Are pstittacos found in both Yixian faunas, Mickey? With mammals, furry
ones have so far only been arrested in the upper Yixian, as far as I'm
aware. Those from the lower are apparently Kojaks such as the /Repenomamus/
sisters, one of which wisely ate a psittaco baby. Naturally, it would be
the preservation characteristics which have stripped them naked.
Tentatively, I'm wondering if the same could possibly apply for some lower
Yixian Liaoning dino lineages.