Little helpers in the garden : 無料・フリー素材/写真
Little helpers in the garden / jeans_Photos
| ライセンス | クリエイティブ・コモンズ 表示 2.1 |
|---|---|
| 説明 | OnychiuridaeLittle white bugs in the garden in Albany. My son has these under wood, cardboard or where-ever there is dampness.I was hoping for a better shot but... Another day. "Springtails - CollembolaInformation from the Australian Faunal Directory - 11 July 2009"The Collembola are minute arthropods. Together with the Diplura and Protura, they are sometimes grouped as the entognathous Hexapoda.For many years Collembola were considered to be primitive insects on the basis of their having, like insects, a pair of antennae inserted anteriorly on the head, a thorax with three pairs of legs, and a segmented abdomen with appendages. However, they differ from insects in several features: they are soft-bodied; the mouthparts are internal and enclosed in extensions of the labrum, labium and plicae orales; wings, malpighian tubules and metamorphosis are absent; the abdomen is always primitively six segmented; tracheae are rarely present; and there is, primitively, a springing organ or furca ventrally, arising from abdominal segment IV. The furca at rest is flexed forward against the body and held in place by a hooked organ, the tenaculum, inserted ventrally on abdominal segment III. Another unique feature of Collembola is the ventral tube on abdominal segment I, which carries a pair of extrusible sacs that are involved in water and salt regulation and, in some species, functions as an adhesive organ. In common with Protura, 'salivary' glands are present in the head. These glands have ventral ducts that connect, in most Collembola, with the ventral tube via a ventral groove.Although directional locomotion is by walking, when disturbed, Collembola can leap considerable distances by rapidly releasing the furca,. After its release, a combination of muscular and hydrostatic forces extends the furca, causing it to hit the ground with force and project the animal a considerable distance into the air. There is some evidence that leaping is partly, at least, directional.Collembola are essentially inhabitants of the soil and soil surface and are almost ubiquitous. They are often extremely abundant, even in habitats considered to be inhospitable for most other terrestrial invertebrates. "CSIRO has an excellent article on them here"FeedingMost species of springtails feed on decaying vegetable matter, although fungi, algae and lichens are also an important food source for many species. Some species within the globular Sminthuridae prefer fresh plant material, and spores and pollen have been found in the gut contents of other springtails. Some species may even feed on decaying animal matter, such as earthworms, dead flies or other Collembola." |
| 撮影日 | 2009-07-04 13:22:37 |
| 撮影者 | jeans_Photos , Perth, Australia |
| タグ | |
| 撮影地 | Albany, Western Australia, Australia 地図 |
| カメラ | NIKON D80 , NIKON CORPORATION |
| 露出 | 0.003 sec (1/320) |
| 開放F値 | f/4.5 |
| 焦点距離 | 60 mm |