barnacle from the beach : 無料・フリー素材/写真
barnacle from the beach / paweesit
| ライセンス | クリエイティブ・コモンズ 表示-改変禁止 2.1 |
|---|---|
| 説明 | Free-living barnacles are attached to the substratum by cement glands that form the base of the first pair of antennae; in effect, the animal is fixed upside down by means of its forehead. In some barnacles, the cement glands are fixed to a long, muscular stalk, but in most they are part of a flat membrane or calcified plate. A ring of plates surrounds the body, homologous with the carapace of other crustaceans. These consist of the rostrum, two lateral plates, two carinolaterals, and a carina. In sessile barnacles, the apex of the ring of plates is covered by an operculum, which may be recessed into the carapace. The plates are held together by various means, depending on species, in some cases being solidly fused. |
| 撮影日 | 2017-01-15 23:03:24 |
| 撮影者 | paweesit |
| タグ | |
| 撮影地 | Silverdale, Washington, United States 地図 |
| カメラ | Canon EOS 5D Mark IV , Canon |
| 露出 | 0.013 sec (1/80) |
| 開放F値 | f/8.0 |
| 焦点距離 | 94 mm |