Nautilus belauensis
| Nautilus belauensis | |
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| Nautilus belauensis | |
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N. belauensis
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| Nautilus belauensis Saunders, 1981
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Nautilus belauensis, also known as the Palau nautilus, is a species of nautilus native to the waters around the Pacific island nation of Palau.[1] N. belauensis is very similar to Nautilus pompilius and shares with this species a closed umbilicus covered with a callus. It differs on the basis of a modified radula and fine raised ridges across and along the shell, which form a cross-grid texture. N. belauensis is the second-largest nautilus after the giant form of N. pompilius pompilius. The shell is usually up to around 210 mm in diameter, although specimens up to 226 mm have been recorded.[2]
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N. belauensis seen from the front, showing the hyponome
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Nautilus from above.jpg
Palau nautilus viewed from above
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Diver and nautilus.jpg
Diver with Palau nautilus showing size of a typical captured specimen
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Nautilus eye, Palau.jpg
Close-up view of the eye of the Palau nautilus
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Nautilus side.jpg
View of a Palau nautilus from the side
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Nautilus cage Palau, Micronesia.jpg
A cage used to capture Palau nautiluses from a depth of approximately 30 m: note the five nautiluses and the mostly eaten chicken. The animals are released unharmed.
References
- ↑ Saunders, W.B. 1981. A new species of Nautilus from Palau. Veliger 24(1): 1–7.
- ↑ Jereb, P. 2005. Family Nautilidae. In: P. Jereb & C.F.E. Roper, eds. Cephalopods of the world. An annotated and Illustrated catalogue of species known to date. Volume 1. Chambered nautiluses and sepioids (Nautilidae, Sepiidae, Sepiolidae, Sepiadariidae, Idiosepiidae and Spirulidae). FAO Species Catalogue for Fishery Purposes. No. 4, Vol. 1. Rome, FAO. pp. 51–55.
- Norman, M. 2000. Cephalopods: A World Guide. Hackenheim, ConchBooks, p. 22.
External links
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