Strongylocentrotus purpuratus (purple sea urchin test) (tidal pool at Yaquina Head, Oregon, USA) : 無料・フリー素材/写真
Strongylocentrotus purpuratus (purple sea urchin test) (tidal pool at Yaquina Head, Oregon, USA) / James St. John
| ライセンス | クリエイティブ・コモンズ 表示 2.1 |
|---|---|
| 説明 | Strongylocentrotus purpuratus (Stimpson, 1857) - partial test from a purple sea urchin + basalt gravel in a tidal pool in Oregon, USA.The rocky shoreline at Yaquina Head, Oregon has some well-developed tidal pools. Seen here is a submerged tidal pool with blackish-colored basalt clasts eroded from the Ginkgo Basalt, one of many lava flows in the Miocene-aged Columbia River Flood Basalt.The light-colored skeletal fragment at center is from the hard-part skeleton of a sea urchin, also known as a regular echinoid. During life, each prominent tubercle had an attached spine. Sea urchins are starfish relatives with a pentaradially-symmetrical, subglobose, calcareous skeleton (test) covered in spines. The mouth is underneath the urchin, close to & at the water-substrate interface. Sea urchins are algae grazers - they use a pentaradially-structured jaw called an "Aristotle's lantern" to scrape algae and biofilms from hard substrates.Classification: Animalia, Echinodermata, Echinoidea, Echinoida, StrongylocentrotidaeLocality: tidal pool on the southern side of Yaquina Head, coastal Oregon, USA-----------------------------------Info. at:en.wikipedia.org/wiki/Strongylocentrotus_purpuratusanden.wikipedia.org/wiki/Sea_urchin |
| 撮影日 | 2012-08-03 13:46:15 |
| 撮影者 | James St. John |
| タグ | |
| 撮影地 |