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Shell of Cephalopod Species Nautilus Pompilius
(Image 1)
Caption:
Nautilus pompilius, an externally shelled cephalopod. Cephalopods are a type of mollusk. Cephalopods are found in all of the world's oceans, from the warm water of the tropics to the near freezing water at the poles.
Cephalopods are an ancient group that appeared some time in the late Cambrian several million years before the first primitive fish began swimming in the ocean. Scientists believe that the ancestors of modern cephalopods (such as octopus, squid, and cuttlefish) diverged from the primitive externally shelled Nautiloidea (Nautilus) very early on, possibly in the Ordovician, some 438 million years ago. Nautilus has been around for 500 million years and are considered living fossils.
[Image 1 of 2 related images; see also, Inner Chambers of Nautilus Pompilius Shell.]
(Preview Only)
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| Credit: |
Credit K.S. Matz |
| Year of Image: |
2003 |
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Categories:
BIOLOGICAL / Biotechnology
Formats Available:
TIFF Format - 24.7M - 2612 x 3310 pixel image - 72 DPI
Sorry! This image is not available in a higher resolution.
Restrictions:
Permission is granted to use this image in a personal, educational, or non-profit/non-commercial manner. All other uses of this image are prohibited, as stated by the owner.
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