Conus sieboldii (Siebold's cone snail) 2 : 無料・フリー素材/写真
Conus sieboldii (Siebold's cone snail) 2 / James St. John
| ライセンス | クリエイティブ・コモンズ 表示 2.1 |
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| 説明 | Conus sieboldii Reeve, 1848 - Siebold's cone snail shell (apertural view), modern (latest Holocene). (public display, Bailey-Matthews Shell Museum, Sanibel Island, Florida, USA)The gastropods (snails & slugs) are a group of molluscs that occupy marine, freshwater, and terrestrial environments. Most gastropods have a calcareous external shell (the snails). Some lack a shell completely, or have reduced internal shells (the slugs & sea slugs & pteropods). Most members of the Gastropoda are marine. Most marine snails are herbivores (algae grazers) or predators/carnivores.The conid gastropods (cone shells) are fascinating marine snails for a couple reasons - they have attractively-shaped, colorful shells and they are killers. The conids are predatory, as are many other marine snails, but they take down their prey in an unusual fashion. The radula of most snails is a mineralized or heavily sclerotized mass of small teeth that scrapes across a substrate during feeding. Conid snails have a toxoglossate radula - one that has been evolutionarily modified into tiny, unattached, toxin-bearing, harpoon-like darts (see photo - science.naturkundemuseum-bw.de/files/images/niederhofer_2...) that can be fired at prey. Each dart is an individual tooth. The nickname "killer snails" is well deserved (even people have been killed). Some species have incredibly powerful toxins, while in other species the toxin has little effect on humans.The Siebold's cone snail shown above is part of the Japanese Province: "Sandwiched between the cold-waters of northern Japan and the warmer, more southerly areas of Okinawa and Taiwan is the rather isolated Japanese Province containing such endemic species as the noble scallop, Japanese wonder shell and many latiaxis snails. This temperate-water area supports about 1,500 species, including the famous Japanese pearl oyster." [info. from museum signage]Conus sieboldii, Siebold's cone snail, is also known as Conasprella sieboldii.Classification: Animalia, Mollusca, Gastropoda, Neogastropoda, Conoidea, Conidae--------------More info. at:en.wikipedia.org/wiki/Conusanden.wikipedia.org/wiki/Conasprella_sieboldii |
| 撮影日 | 2016-01-03 16:43:54 |
| 撮影者 | James St. John |
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