Sentences with phrase «in placoderms»
An ichthyologist specializing in placoderms, or armored fish, Dean was also an enthusiastic collector of armor.
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The big surprise was in the placoderms» abdominal muscles.
This backs up a 2013 study that showed that several traits thought to be unique to bony fish, such as the presence of large platelike bones, were in fact present in placoderms, an extinct group of jawed fish related to the ancestor of both cartilaginous and bony fish.
Not exact matches
The fossil fish Tiktaalik, discovered in 2006, dates back to the same period, and its skeleton bears many more similarities to tetrapods than to the placoderms described in Long's article — including homologous arm bones and shoulder, neck and ear features.
Although placoderms are long extinct, getting glimpses of their lives puts more pieces together in the evolutionary puzzle.
A quarry in Strud, Belgium, that was excavated between 2004 and 2015 yielded fossils of multiple species of placoderms, which are extinct, armored fish that represent some of the earliest jawed vertebrates on Earth.
Daeschler and Olive's work focused largely on comparing the Red Hill site to Strud, noting many similarities between the two and using the size and shape of placoderm fossils from Red Hill, housed at the Academy of Natural Sciences, to establish the relative maturity of samples found in Strud.
«In the case of placoderms like these, we're looking at some of the earliest jawed vertebrates,» Olive said.
Fossils inlaid within the rocks in the Cliff area hint at previous inhabitants of the island, consisting of enormous trilobite lookalikes, gastropods, placoderm fish, and eurypterids as well.