Ammonites are an extinct group of marine invertebrate animals in the subclass Ammonoidea of the class Cephalopoda. These molluscs are more closely related to living coleoids than they are to shelled nautiloids such as the living Nautilus species.
Plate 024, Pattern Plates for the Mineral Conchology of Great Britain, Between 1810-1845. Location: The John Work Garrett Library. Original archival hand colored pattern plates for James Sowerby's"Mineral conchology of Great Britain, or, Coloured figures and descriptions of those remains of testaceous animals, or shells which have been preserved at various times, and depths in the earth." This work was published over a 34 year period (1812-1846).
Archaeopteryx Berlin specimen is considered the most famous fossil in the world. It is about 150 Ma & was discovered in limestone deposits in Eichstaett, Bavaria. Archaeopteryx has bird flight feathers, but also has reptile features such as a tail bone & claws on the wing bones
Fossil Fern- "Fossil Fern This is a fossil fern that I found in Russellville AR and its from the Pennsylvanian, an era within the Carboniferous, which was about 300 million years ago, rounded off of course. I believe it to be a neuropteris fern."
Turtle fossil ~K~ Still a TURTLE ! Not a part turtle/part bird, or part lizard, or part frog !