Meekoceras Gracilitatis

	Meekoceras Gracilitatis ''Meekoceras'' is an extinct genus of ceratitid ammonites with a discoidal shell that lived during the Early Triassic Epoch. Description ''Meekoceras'' is characterized by a compressed, discoidal, evolute or involute shell with flattened sides and narrow, flattened or rounded venter that is without keels or furrows. The surface is smooth or with lateral folds, but no tubercles, spines, or spiral ridges. Umbilicus variable, body chamber short. Sutures ceratitic with smooth rounded saddles and serrated lobes. Taxonomic position Smith (1932) and Arkell et al. (1957) included ''Meekoceras'' in the Meekoceratidae, which was named to contain the genus. Different approaches were made regarding the next taxonomic level. Arkell, et al. (1957) includes Meekoceratidae in the Noritacdeae while Smith (1932) included them in the Prolecanitoidea Prolecanitoidea is a taxonomic superfamily of ammonites, fossil cephalopods. This is one of two superfamilies in the Prolecanitida. The ot ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	New Mexico Museum Of Natural History And Science The New Mexico Museum of Natural History and Science is a natural history and science museum in Albuquerque, New Mexico near Old Town Albuquerque. The Museum was founded in 1986. It operates as a public revenue facility of the New Mexico Department of Cultural Affairs. Permanent exhibits The Museum's permanent exhibit halls illustrate a journey through time, covering the birth of the Universe (≈13.6 billion years ago) to the Ice Age (≈10,000 years ago). The eight journey through time halls are as follows: Origins Dawn of the Dinosaurs Jurassic Age of Super Giants New Mexico's Seacoast Age of Volcanoes Rise of the Recent - Evolving Grasslands Cave Experience New Mexico's Ice Age Other permanent exhibits include an interactive planetarium where programs are held daily. There is also a floor of exhibit galleries dedicated to astronomy and space exploration, as well as an observation deck for viewing through the telescope. The observatory opens only occasionally, usually ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Early Triassic The Early Triassic is the first of three epochs of the Triassic Period of the geologic timescale. It spans the time between Ma and Ma (million years ago). Rocks from this epoch are collectively known as the Lower Triassic Series, which is a unit in chronostratigraphy. The Early Triassic is the oldest epoch of the Mesozoic Era. It is preceded by the Lopingian Epoch (late Permian, Paleozoic Era) and followed by the Middle Triassic Epoch. The Early Triassic is divided into the Induan and Olenekian ages. The Induan is subdivided into the Griesbachian and Dienerian subages and the Olenekian is subdivided into the Smithian and Spathian subages. The Lower Triassic series is coeval with the Scythian Stage, which is today not included in the official timescales but can be found in older literature. In Europe, most of the Lower Triassic is composed of Buntsandstein, a lithostratigraphic unit of continental red beds. The Early Triassic and partly also the Middle Triassic span the in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
picture info	Triassic Ammonites The Triassic ( ) is a geologic period and system which spans 50.6 million years from the end of the Permian Period 251.902 million years ago ( Mya), to the beginning of the Jurassic Period 201.36 Mya. The Triassic is the first and shortest period of the Mesozoic Era. Both the start and end of the period are marked by major extinction events. The Triassic Period is subdivided into three epochs: Early Triassic, Middle Triassic and Late Triassic. The Triassic began in the wake of the Permian–Triassic extinction event, which left the Earth's biosphere impoverished; it was well into the middle of the Triassic before life recovered its former diversity. Three categories of organisms can be distinguished in the Triassic record: survivors from the extinction event, new groups that flourished briefly, and other new groups that went on to dominate the Mesozoic Era. Reptiles, especially archosaurs, were the chief terrestrial vertebrates during this time. A specialized subgroup of archosaurs ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]