Nautilus studies-- the first twenty-two centuries / Richard Arnold Davis -- The ancestry of the genus Nautilus / Curt Teichert and Tatsuro Matsumoto -- The species of Nautilus / W. Bruce Sanders -- ...
Three kinds of spiral-shelled nautilus have been identified as separate species, increasing the known number of nautilus species by as much as 50 per cent. Hundreds of millions of years ago, these ...
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