Hommage
Sesimbra, Nautilus.
Nautilus (in vernacular Portuguese, nautilus) is a genus of marine nektonic cephalopod molluscs from the Indo-Pacific, classified by Carolus Linnaeus, in 1758, in his Systema Naturae, when describing its best-known species: Nautilus pompilius. They belong to the family Nautilidae and order Nautilida,characterized by having a large calcareous external shell with a convoluted spiral (brevicone type), divided into chambershragmocone) which are pierced by a siphon and used as a protection and flotation device. Their buoyancy is controlled by the animal by pumping liquid or gas in and out of these chambers, through osmosis;providing them with vertical movements,while their horizontal movements are provided by water jets , expelled through funnel tubes, visible between the two lowest tentacles, propelling them forward or backward.
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Taken on Thursday January 12, 2023
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Posted on Tuesday September 10, 2024
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7 comments
LotharW said:
Madeleine Defawes said:
Bonne journée. Amitiés
William Sutherland said:
Admired in: www.ipernity.com/group/tolerance
Günter Klaus said:
Wünsche noch einen schönen Nachmittag,liebe Grüße Güni :))
Fred Fouarge said:
Adele said:
Thank you for sharing it on the group For Fabio www.ipernity.com/group/2800806
J. Gafarot replied to Adele: