Re: four winged Archaeopteryx

[Tim Williams <twilliams_alpha@hotmail.com>]

David Marjanovic wrote:

> Are they? Last I checked *C.* had those faint impressions,

This is news to me.  Do you have the reference which says that 
_Compsognathus_ preserved some kind of hair/bristles/fuzz?  I know Ostrom 
(1978) mentioned some kind of "striations" present at various places in the 
holotype (forearm, ischium, base of the tail); but these impressions could 
represent internal soft tissue.

_Juravenator_ certainly doesn't preserve any feather-like structures.  The 
tail does preserve integumentary structures, in the form of the skin (made 
up of small tubercles).

> and a *Pterodactylus* specimen had goethite bristles that seem to have 
> replaced "hair" in fossilisation.

Again, news to me.  I'm not saying you're wrong, BTW.  But again, do you 
have a ref for this?

> Hot and dry.

Monsoonal and semiarid, was Solnhofen.  So this would be right.

Cheers

Tim