安裝中文字典英文字典辭典工具!
安裝中文字典英文字典辭典工具!
|
- Brachiopod - Wikipedia
Brachiopods ( ˈbrækioʊˌpɒd ), phylum Brachiopoda, are a phylum of animals that have hard "valves" (shells) on the upper and lower surfaces, unlike the left and right arrangement in bivalve molluscs Brachiopod valves are hinged at the rear end, while the front can be opened for feeding or closed for protection
- Brachiopods - Examples, Characteristics, Fossils, Pictures
Brachiopods are exclusively marine animals that inhabit environments with minimal strong currents or waves They are generally found in cold, low-light conditions, such as crevices, caves, under rocky overhangs, continental shelves, and deep ocean floors
- Brachiopods - Geology Science
Brachiopods, often referred to as "lampshells," are a group of marine invertebrates that have existed on Earth for over half a billion years They are members of the phylum Brachiopoda and are considered one of the oldest known animal groups, with a rich fossil record stretching back to the early Cambrian period
- Brachiopods - British Geological Survey
Brachiopods are marine animals belonging to their own phylum of the animal kingdom, Brachiopoda Although relatively rare, modern brachiopods occupy a variety of seabed habitats ranging from the tropics to the cold waters of the Arctic and, especially, the Antarctic
- Brachiopoda - Digital Atlas of Ancient Life
Brachiopods have been around since the Cambrian (~550 million years ago) and were among the first animal groups to diversify on Earth During the Paleozoic era (541-252 million years ago) they were the most common shelled marine macroinvertebrates
- Fossil Brachiopods - U. S. National Park Service
Brachiopoda were a dominant group of marine organisms during the Paleozoic Their name comes from the Greek words brachion, meaning “arm,” and podos, meaning “foot ” This references to their internal anatomy Brachiopods were once thought to be mollusks, which have a muscular internal foot
- Lamp shells | Animal Anatomy Adaptations | Britannica
lamp shells, any member of the phylum Brachiopoda, a group of bottom-dwelling marine invertebrates They are covered by two valves, or shells; one valve covers the dorsal, or top, side; the other covers the ventral, or bottom, side
- ADW: Brachiopoda: INFORMATION
Brachiopods have transient gonads that develop from the peritoneum of the metacoel Gametes are released through the nephridia In most cases, fertilization is external; in a few species of brachiopods, females pick up sperm from the water and fertilization is internal
|
|
|