articulate brachiopods
1lamp shells — ▪ animal Introduction also called brachiopod, 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… …
2Brachiopod — Taxobox name = Brachiopoda fossil range = Cambrian Recent image width = 250px image caption = Living brachiopods regnum = Animalia phylum = Brachiopoda phylum authority = Duméril, 1806 subdivision ranks = Subphyla and classes subdivision = See… …
3Ordovician Period — Interval of geologic time, 490–443 million years ago, the second oldest period of the Paleozoic Era. It follows the Cambrian and precedes the Silurian. During the Ordovician, many of the landmasses were aligned in the tropics. Life was dominated… …
4Ordovician — Period 488.3–443.7 million years ago …
5Carboniferous Period — Interval of geologic time 354–290 million years ago, marked by great changes in world geography. All the landmasses drew closer together as a result of tectonic plate movements. The supercontinent Gondwana occupied much of the Southern Hemisphere …
6Geologic time scale — This clock representation shows some of the major units of geological time and definitive events of Earth history. The Hadean eon represents the time before fossil record of life on Earth; its upper boundary is now regarded as 4.0 Ga.[1] Other… …
8Mesozoic Marine Revolution — The Mesozoic marine revolution (MMR) was a fundamental restructuring of marine ecosystems during the Mesozoic era, particularly in the Jurassic and Cretaceous,[1] caused by increased predation pressure. The term was coined by Geerat J. Vermeij… …
9Megabias — This article is about the palæobiological phenomenon. For the band, see Megabias (band). A megabias, or a taphonomic megabias is a large scale pattern in the quality of the fossil record that affects paleobiologic analysis at provincial to global …
10Early Triassic — The Early Triassic (also known as Lower Triassic, Buntsandstein, or Scythian) is the first of three epochs of the Triassic period. It spans the time between 251 ± 0.4 Ma and 245 ± 1.5 Ma (million years ago). The Permian Triassic extinction event… …
