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brachiopod    音标拼音: [br'ekiəp,ɑd]
n. 腕足类动物的一种

腕足类动物的一种

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  • Brachiopod - Wikipedia
    Two major categories are traditionally recognized, articulate and inarticulate brachiopods The word "articulate" is used to describe the tooth-and-groove structures of the valve-hinge which is present in the articulate group, and absent from the inarticulate group
  • 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
  • Brachiopods - Examples, Characteristics, Fossils, Pictures
    More than 12,000 fossil species have been recognized, with the earliest undisputed brachiopod dating back to the Early Cambrian Period It is believed that inarticulate brachiopods arose first, followed by articulate forms
  • What Are Brachiopods? Anatomy, Fossils, and Ecology
    Brachiopods are an ancient group, with a fossil record extending back to the Cambrian Period, over 500 million years ago Although less common today, their long history makes them fascinating subjects for understanding life’s evolution in the sea
  • Brachiopods - British Geological Survey
    Brachiopods are virtually defenceless and their shell, enclosing the animal’s organs, is the only protection against predators Most are permanently attached by a fleshy stalk (the pedicle) to a hard, sea-floor surface and are incapable of actively pursuing food
  • Brachiopoda Classification - Digital Atlas of Ancient Life
    Traditionally, brachiopods have been separated into two major groups: the Inarticulates (brachiopods with phosphatic shells) and Articulates (everything else)
  • A Modern Day Brachiopod - Smithsonian Ocean
    While they may all look the same to us, during the Paleozoic era (roughly 250-500 million years ago), brachiopods ruled the sea They were the most common and most diverse organisms around, each clinging to the seafloor with a muscular foot and even accumulating into ancient reefs
  • Brachiopods - Paleontological Society
    Some of the oldest shelly invertebrate fossils known are brachiopods They have a fossil record stretching back to the start of the Cambrian Period, some 570 million years ago (Table 1) Brachiopods are still living in the world’s oceans It is the brachiopod valves that are often found fossilized
  • Introduction to the Brachiopoda
    Depsite their relative obscurity today, brachiopods have a long and rich paleontological history During the Paleozoic era, they were extremely abundant They diversified into a number of different morphologies and even participated in the build-up of ancient reefs
  • Brachiopoda (lamp-shells) | INFORMATION | Animal Diversity Web
    Brachiopods range in size from 1 mm to 9 cm in length, and all known species are solitary, benthic, marine animals with a two part shell (valve); the valves of Inarticulata species are attached only by muscles, while the valves of Articulata species have a tooth-and-socket hinge





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