Nautilus stenomphalus

Nautilus stenomphalus

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Nautilus stenomphalus

Nautilus stenomphalus, also known as the white-patch nautilus, is a species of nautilus native to the Great Barrier Reef. N. stenomphalus is very similar to N. pompilius and may in fact represent a subspecies. It is separated by the absence of a thickened callus and the presence of white patches in the umbilical and shoulder regions of the shell. The sheaths of this species have scalloped edges compared with the smooth sheaths of N. pompilius. N. stenomphalus also differs slightly in hood ornamentation. The shell is usually up to around 180 mm in diameter, although the largest specimen ever recorded measured 201 mm.

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References

1. Nautilus stenomphalus Wikipedia article - https://en.wikipedia.org/wiki/Nautilus_stenomphalus

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