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Dikelocephalidae
Dikelocephalidae is a family of trilobites, that lived during the Upper Cambrian. Relatively large eyes close to the glabella The glabella, in humans, is the area of skin between the eyebrows and above the nose. The term also refers to the underlying bone that is slightly depressed, and joins the two brow ridges. It is a cephalometric landmark that is just superior to ..., is a shared characteristic. The following genera have been assigned to this family: *'' Berkeia'' *'' Blandicephalus'' *'' Briscoia'' *'' Camaraspoides'' *'' Dikelocephalus'' *'' Elkia'' *'' Goumenzia'' *'' Hoytaspis'' *'' Iranella'' *'' Kasachstanaspis'' *'' Monocheilus'' *'' Olimus'' *'' Osceolia'' *'' Parabriscoia'' *'' Patalolaspis'' *'' Princetonella'' *'' Pterocephalops'' *'' Randicephalus'' *'' Stigmacephalus'' *'' Taebaeksaukia'' *'' Walcottaspis'' References Dikelokephaloidea Trilobite families Cambrian first appearances Cambrian extinctions {{asaphida-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Taebaeksaukia
''Taebaeksaukia spinata'' is a species of trilobites in the family Dikelocephalidae, which existed in what is now Korea during the upper Furongian The Furongian is the fourth and final epoch and series of the Cambrian. It lasted from to million years ago. It succeeds the Miaolingian series of the Cambrian and precedes the Lower Ordovician Tremadocian Stage. It is subdivided into three sta ... period. It was described in 2011, and is the only species in the genus ''Taebaeksaukia''. References Dikelocephalidae Asaphida genera Cambrian trilobites Fossil taxa described in 2011 Monotypic arthropod genera Prehistoric arthropods of Asia {{Asaphida-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dikelocephalidae
Dikelocephalidae is a family of trilobites, that lived during the Upper Cambrian. Relatively large eyes close to the glabella The glabella, in humans, is the area of skin between the eyebrows and above the nose. The term also refers to the underlying bone that is slightly depressed, and joins the two brow ridges. It is a cephalometric landmark that is just superior to ..., is a shared characteristic. The following genera have been assigned to this family: *'' Berkeia'' *'' Blandicephalus'' *'' Briscoia'' *'' Camaraspoides'' *'' Dikelocephalus'' *'' Elkia'' *'' Goumenzia'' *'' Hoytaspis'' *'' Iranella'' *'' Kasachstanaspis'' *'' Monocheilus'' *'' Olimus'' *'' Osceolia'' *'' Parabriscoia'' *'' Patalolaspis'' *'' Princetonella'' *'' Pterocephalops'' *'' Randicephalus'' *'' Stigmacephalus'' *'' Taebaeksaukia'' *'' Walcottaspis'' References Dikelokephaloidea Trilobite families Cambrian first appearances Cambrian extinctions {{asaphida-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dikelocephalus
''Dikelocephalus'' is a genus of very large trilobites of up to long, that lived during the last 3 million years of the Cambrian ( Sunwaptan). Their fossils are commonly found as disarticulated sclerites, in the upper Mississippi Valley (northeastern Iowa, southeastern Wisconsin, central to western Wisconsin) and in Canada (Alberta). The exoskeleton is rounded anteriorly, with the thorax and sides of the tailshield (or pygidium) slightly tapering to about ⅔× of the width across the base of the spines at the back of the headshield (or cephalon). At the side corners of the pygidium there may be triangular or hooked spines, pointing backwards, while between the spines the posterior margin is at a 30-75° angle with the lateral margin, gently convex or nearly straight. If pygidial spines are lacking, the margin is gradually rounded. The thorax has 12 segments. Distribution The oldest known specimens of ''Dikelocephalus'' have been found in the upper part of the Tunnel City Gro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asaphida
Asaphida is a large, morphologically diverse order of trilobites found in marine strata dated from the Middle Cambrian until their extinction during the Silurian. Asaphida contains six superfamilies (Anomocaroidea, Asaphoidea, Cyclopygoidea, Dikelocephaloidea, Remopleuridoidea and Trinucleioidea), but no suborders. Asaphids comprise some 20% of described fossil trilobites. In 2020, the superfamily Trinucleoidea was proposed to be raised to an order ( Trinucleida) and removed from Asaphida. Morphology The Asaphids generally have cephalon (head) and pygidium (tail) parts similar in size, and most species have a prominent median ventral suture. Heads are often flat, and carapace furrows in the head area are often faint or not visible. Thoracic segments typically number 5 - 12, though some species have as few as two and some as many as 30. They also generally have a wide doublure, or rim, that surrounds the cephalon. This causes some specimens to be described as having a char ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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] |
Journal Of Paleontology
The ''Journal of Paleontology'' is a peer-reviewed scientific journal covering the field of paleontology. It is published by the Paleontological Society. Indexing The ''Journal of Paleontology'' is indexed in: *BIOSIS Previews *Science Citation Index *The Zoological Record *GeoRef __NOTOC__ The GeoRef database is a bibliographic database that indexes scientific literature in the geosciences, including geology. Coverage ranges from 1666 to the present for North American literature, and 1933 to the present for the rest of t ... References Paleontology journals Publications established in 1927 Academic journals published by learned and professional societies Cambridge University Press academic journals Bimonthly journals Paleontological Society {{paleo-journal-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
