Alokistocaridae

	Alokistocaridae Alokistocaridae is a family of ptychopariid trilobites that lived from the Botomian epoch of the Early Cambrian until the Late Cambrian. Alokistocarids were particle feeders and left small furrows which are occasionally preserved.Coppold, Murray and Wayne Powell (2006). ''A Geoscience Guide to the Burgess Shale'', p.54. The Burgess Shale Geoscience Foundation, Field, British Columbia. . Their remains are found worldwide. ''Elrathia kingii'', one of the most collected trilobites in the world, is a typical alokistocarid. Description Alokistocarids have an exoskeleton that is elongated ovate to inverted egg-shaped. The headshield (or cephalon) is semicircular and has a well-defined border. The central raised area of the cephalon (or glabella) is somewhat tapering forward, generally with 3 or 4 pairs of more or less distinct lateral furrows. The front of the glabella is rounded or truncate, and is separated from the border by a wide, moderately convex to flat (or rarely concave) so- ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
picture info	Animal Animals are multicellular, eukaryotic organisms in the Kingdom (biology), biological kingdom Animalia. With few exceptions, animals Heterotroph, consume organic material, Cellular respiration#Aerobic respiration, breathe oxygen, are Motility, able to move, can Sexual reproduction, reproduce sexually, and go through an ontogenetic stage in which their body consists of a hollow sphere of Cell (biology), cells, the blastula, during Embryogenesis, embryonic development. Over 1.5 million Extant taxon, living animal species have been Species description, described—of which around 1 million are Insecta, insects—but it has been estimated there are over 7 million animal species in total. Animals range in length from to . They have Ecology, complex interactions with each other and their environments, forming intricate food webs. The scientific study of animals is known as zoology. Most living animal species are in Bilateria, a clade whose members have a Symmetry in biology#Bilate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Ithyektyphus ''Ithyektyphus'' is an extinct genus from a well-known class of fossil marine arthropods, the trilobite Trilobites (; meaning "three lobes") are extinct marine arthropods that form the class Trilobita. Trilobites form one of the earliest-known groups of arthropods. The first appearance of trilobites in the fossil record defines the base of the ...s. It lived during the Cambrian Period, which lasted from approximately 542 to 488 million years ago. References Alokistocaridae Cambrian trilobites Fossils of the United States {{ptychopariida-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Elrathina Ptychoparioidea is a superfamily of the Ptychopariida order of trilobites.Pour M. G., Popov L. E. (2009) Silicified Middle Cambrian trilobites from Kyrgyzstan, Palaeontology, 1039-1056 Taxonomy Family Acrocephalitidae Family Alokistocaridae Alokistocaridae is a family of ptychopariid trilobites that lived from the Botomian epoch of the Early Cambrian until the Late Cambrian. Alokistocarids were particle feeders and left small furrows which are occasionally preserved.Coppold, Murray ... Family Antagmidae Family Asaphiscidae Family Atopidae Family Bolaspididae Family Cedariidae Family Changshaniidae Family Conocoryphidae Family Conokephalinidae Family Crepicephalidae Family Diceratocephalidae Family Elviniidae Family Eulomidae Family Holocephalinidae Family Ignotogregatidae Family Inouyiidae Family Isocolidae Family Kingstoniidae Family Liostracinidae Family Llanoaspididae Family Lonchocephalidae Family Lorenzellidae ... [...More Info...] [...Related Items...] OR:* [Wikipedia] [Google] [Baidu]
	Elrathia ''Elrathia'' is a genus of trilobite belonging to Ptychopariacea known from the mid-Cambrian of Laurentia (North America). ''E. kingii'' is one of the most common trilobite fossils in the USA locally found in extremely high concentrations within the Wheeler Formation in the U.S. state of Utah. ''E. kingii'' has been considered the most recognizable trilobite. Commercial quarries extract ''E. kingii'' in prolific numbers, with just one commercial collector estimating 1.5 million specimens extracted in a 20-year career. 1950 specimens of ''Elrathia'' are known from the Greater Phyllopod bed, where they comprise 3.7% of the community. Etymology Even though the generic name ''Elrathia'' was first published in the combination ''E. kingii'', a species from the House Range, Utah, the name, itself, is derived from Elrath, Cherokee County, Alabama. Description ''E. kingii'' is a medium-sized trilobite with a smooth sub-ovate carapace that is tapered towards the rear. Thorax is usua ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]