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A juvenile lungfish (11cm) from the famous Miguasha fossil site, now a UNESCO World Heritage Centre. Taxonomy from Fossilworks.org. Emended genus diagnosis from Cloutier 1996, p. 199: " Maximum depth of body one-sixth of its total length. First dorsal fin low, with maximum height from one-eighth to one-seventh its length, originating at the level of the fourth supraneural. First dorsal fin 16% of total length without ossified radials; second dorsal fin 30% of total length, and higher than first dorsal fin, itsmaximum height amounting to two-thirds of maximum body depth. Traquair (
Bothriolepis ("pitted scale" or "trench scale") was the most successful genus of antiarch placoderms with over 100 species found on every continent, including Antarctica . The extinct armored fishes known as placoderms make up what is considered to be the earliest branch of the gnathostome family tree -- the earliest branch of the jawed fishes. Antiarchs are characterized by the fact that their pectoral fins are enclosed in bony tubes (pectoral appendages). Instead of typical fish-like pectoral fins, it bears a pair of rigid arms that are joined at two points. These arms, like the limbs of an
m.e.clark posted a topic in Fossil IDHello, For academics purpose, I must identify parts of a fine specimen of Bothriolepis canadensis. I've spent a great deal of time trying to find how these parts were called, and couldn't find a convincing answer. One of my guess is that the anterior central structure shown on the pictures is the preorbital recess, but I'm pretty unsure of what would be the two cavities on its side, if it is indeed the preorbital recess. My second interrogation concerns the posterior end, where there are two mores plates, in V shapes. Then again, I have no clue what those might be. Therefor
Taken from my blog: http://redleafz.blogspot.ca/2013/08/miguasha-national-park-quebec-canada.html (I had wished that somebody from la belle province would have posted anything on Miguasha, but I guess I'll be the first =P ) A few weeks ago I took a day trip to our neighboring province of Quebec to check out Miguasha National Park. I've always wanted to check that place since I've started researching fossil localities. Miguasha National Park is what the paleontology community sees as the world's most important paleontological fossil record of the Devonian Period. Most of the main fossil fis