![](http://www.alamy.com/thumbs/6/08FCE764-62FC-40DD-9CE0-F22635933934/CPDGR4.jpg)
Ammonites. Parkinsonia parkinsoni (left) and Stephanoceras humphriesianum (right).
Ammonites. Parkinsonia parkinsoni (left) and Stephanoceras humphriesianum (right). Natural History Museum. London. United Kingdom.
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Keywords: ammonites, ammonoidea, ancient, animal, animals, britain, cephalopoda, description, england, extinct, fauna, fossil, fossils, great, history, humphriesianum, inferior, information, invertebrate, kingdom, london, marine, middle, mollusc, museum, natural, oolite, paleontology, parkinsoni, parkinsonia, prehistoric, prehistorical, prehistory, shell, spiral, stephanoceras, uk, united, upper