So apparently one of the rare Archaeopteryx fossils, the Haarlem specimen in Holland to be precise, turns out to be not an Archaeopteryx at all but a more primitive featured dinosaur closely related to the Chinese Anchiornis. This specimen from Bavaria, Germany was found (in 1855) well before Archaeopteryx was described and was originally misidentified as a Pterosaur. Only later was it identified as a feathered Archaeopteryx, which now it turns out might also not be completely accurate. With it now being described as an Anchiornithid, that makes it the only species of this group outside China.
The Haarlem specimen has been named Ostromia crassipes.
Open access paper
https://bmcevolbiol.biomedcentral.com/articles/10.1186/s12862-017-1076-y
A number of years ago I made a drawing of this specimen, I suppose I need to update it now
My drawing, which also shows what remains are actually present on this specimen.