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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
- 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
- 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
- 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
- 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)
- 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
- Brachiopoda – Atlas of Ordovician Life
What is a brachiopod? While many types of animals were common on the Ordovician sea floor, perhaps none were more important than the brachiopods Brachiopods are marine invertebrates belonging to the Phylum Brachiopoda, characterized by two bilaterally symmetrical valves
- Brachiopods: Ancient Survivors Shed Light on Evolutionary Mysteries . . .
Brachiopods are sessile marine invertebrates which have a bivalve shell and bear a number of ciliated tentacles around the mouth The shell resembles that of a bivalve mollusc but the structure of the body is quite different and the animals are placed in a separate phylum, the Brachiopoda
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