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At first, please to excuse my bad english language.
Paul Davis wrote:
> The Solnhofen Compsognathus has eggs preserved [...] about 17 if
> memory serves me right
I have a good replica of Compsognathus longipes, and I am unable to find any
of the eggs or eggshell...Please, can you indicate me where you have see this
17 eggs? In its stomach is Bavarisaurus...but eggs?
> The Berlin specimen shows some traces in the neck region which my
> well be body contour feathers but I have yet to convince myself
Also, I have a good replica of Archy from Berlin specimen, and I can see
impressions featherlike surrounding the body: Impressions along its
on dorsal blackbone...indeed, the structure of this impressions is not the
feather of the wings, right, but are impressions of the soft feathers
To all friends,
And now a silliness...
In the early bird evolution: If a fossil skeleton have not evidence of the
feathers but its bone structures have a primitive condition near to old
*birds*...Can we indentify it as bird or dino..?(for instance Compsognathus)
My idea (attention, only idea, not evidence!) about the beginning of feathers
If the hypothesis of a beginning to thermal retention based on feather
is accepted in(parcial or not) endogenotermic, fast and agile protoavians, we
consider this adaptation as relating to those causes which would favour body
This presumed heat loss must have been linked to an important biological
as if not, the appearance of feathers would not have prospered. It is possible
that this function might have, among other possibilities, concerned obtaining
food, its source and the feeding methods used.
Among the divers biotopes which presented a varied fauna there were lakes,
and marshes, where there could have been no lack of larvae, aquatic insects,
molluscs, crustaceans (remember Eoalulavis hoyasi), fish and amphibians.
We can imagine a small group of protoavian theropods beginning predatory
incoursions into the water.Continuous invasions of the water in search of food,
would tend to reduce corporal temperature, encouraging insulatin, waterproof
feather covering, devired from special type of scale, to preserve the animal's
With regard to this it is also interesting to observe a significant porportion
Early Cretaceous fossil birds are related to aquatic environments...
Some references:*The evolution of Feathers* Jan Dyck. Zoologica Scripta.1985
*Hypothetical begginnings of feathers in continental aquatic
A.Lacasa. Terra Nova 1993.