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Arniotites
''Arnioceras'' is an extinct genus of large, evolute, discoidal ammonite from the Lower Jurassic. The shell is normally coiled so that all whorls are exposed. Sides bear strong sharp ribs that are straight until reaching the ventrolateral edge where they swing forward and fade. The rim (venter) is keeled and free of grooves. ''Arnioceras'', named by Alpheus Hyatt, is included in the arietitid family of the Psiloceratoidea Psiloceratoidea is a superfamily of Early Jurassic ammonoid cephalopods proposed by Hyatt in 1867, assigned to the order Ammonitida. They were very successful during Hettangian and Sinemurian. Last of them, family Cymbitidae and genera ''Hypoxy ..., an ammonitid supefamily. Its distribution is fairly worldwide, having been found in Europe, south Asia, and North and South America. References ;Notes ;Bibliography * Jurassic ammonites Jurassic ammonites of North America Ammonitida genera Early Jurassic ammonites Hasle Formation Taxa named by Al ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arnioceras Rejectum
''Arnioceras'' is an extinct genus of large, evolute, discoidal ammonite from the Lower Jurassic. The shell is normally coiled so that all whorls are exposed. Sides bear strong sharp ribs that are straight until reaching the ventrolateral edge where they swing forward and fade. The rim (venter) is keeled and free of grooves. ''Arnioceras'', named by Alpheus Hyatt, is included in the arietitid family of the Psiloceratoidea Psiloceratoidea is a superfamily of Early Jurassic ammonoid cephalopods proposed by Hyatt in 1867, assigned to the order Ammonitida. They were very successful during Hettangian and Sinemurian. Last of them, family Cymbitidae and genera ''Hypoxy ..., an ammonitid supefamily. Its distribution is fairly worldwide, having been found in Europe, south Asia, and North and South America. References ;Notes ;Bibliography * Jurassic ammonites Jurassic ammonites of North America Ammonitida genera Early Jurassic ammonites Hasle Formation Taxa named by Al ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arnioceras Insolitum
''Arnioceras'' is an extinct genus of large, evolute, discoidal ammonite from the Lower Jurassic. The shell is normally coiled so that all whorls are exposed. Sides bear strong sharp ribs that are straight until reaching the ventrolateral edge where they swing forward and fade. The rim (venter) is keeled and free of grooves. ''Arnioceras'', named by Alpheus Hyatt, is included in the arietitid family of the Psiloceratoidea Psiloceratoidea is a superfamily of Early Jurassic ammonoid cephalopods proposed by Hyatt in 1867, assigned to the order Ammonitida. They were very successful during Hettangian and Sinemurian. Last of them, family Cymbitidae and genera ''Hypoxy ..., an ammonitid supefamily. Its distribution is fairly worldwide, having been found in Europe, south Asia, and North and South America. References ;Notes ;Bibliography * Jurassic ammonites Jurassic ammonites of North America Ammonitida genera Early Jurassic ammonites Hasle Formation Taxa named by Al ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arnioceras Semicostatum
''Arnioceras'' is an extinct genus of large, evolute, discoidal ammonite from the Lower Jurassic. The shell is normally coiled so that all whorls are exposed. Sides bear strong sharp ribs that are straight until reaching the ventrolateral edge where they swing forward and fade. The rim (venter) is keeled and free of grooves. ''Arnioceras'', named by Alpheus Hyatt, is included in the arietitid family of the Psiloceratoidea Psiloceratoidea is a superfamily of Early Jurassic ammonoid cephalopods proposed by Hyatt in 1867, assigned to the order Ammonitida. They were very successful during Hettangian and Sinemurian. Last of them, family Cymbitidae and genera ''Hypoxy ..., an ammonitid supefamily. Its distribution is fairly worldwide, having been found in Europe, south Asia, and North and South America. References ;Notes ;Bibliography * Jurassic ammonites Jurassic ammonites of North America Ammonitida genera Early Jurassic ammonites Hasle Formation Taxa named by Al ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arnioceras Robustum
''Arnioceras'' is an extinct genus of large, evolute, discoidal ammonite from the Lower Jurassic. The shell is normally coiled so that all whorls are exposed. Sides bear strong sharp ribs that are straight until reaching the ventrolateral edge where they swing forward and fade. The rim (venter) is keeled and free of grooves. ''Arnioceras'', named by Alpheus Hyatt, is included in the arietitid family of the Psiloceratoidea Psiloceratoidea is a superfamily of Early Jurassic ammonoid cephalopods proposed by Hyatt in 1867, assigned to the order Ammonitida. They were very successful during Hettangian and Sinemurian. Last of them, family Cymbitidae and genera ''Hypoxy ..., an ammonitid supefamily. Its distribution is fairly worldwide, having been found in Europe, south Asia, and North and South America. References ;Notes ;Bibliography * Jurassic ammonites Jurassic ammonites of North America Ammonitida genera Early Jurassic ammonites Hasle Formation Taxa named by Al ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arnioceras Paucicostum
''Arnioceras'' is an extinct genus of large, evolute, discoidal ammonite from the Lower Jurassic. The shell is normally coiled so that all whorls are exposed. Sides bear strong sharp ribs that are straight until reaching the ventrolateral edge where they swing forward and fade. The rim (venter) is keeled and free of grooves. ''Arnioceras'', named by Alpheus Hyatt, is included in the arietitid family of the Psiloceratoidea Psiloceratoidea is a superfamily of Early Jurassic ammonoid cephalopods proposed by Hyatt in 1867, assigned to the order Ammonitida. They were very successful during Hettangian and Sinemurian. Last of them, family Cymbitidae and genera ''Hypoxy ..., an ammonitid supefamily. Its distribution is fairly worldwide, having been found in Europe, south Asia, and North and South America. References ;Notes ;Bibliography * Jurassic ammonites Jurassic ammonites of North America Ammonitida genera Early Jurassic ammonites Hasle Formation Taxa named by Al ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arnioceras Nevadanum
''Arnioceras'' is an extinct genus of large, evolute, discoidal ammonite from the Lower Jurassic. The shell is normally coiled so that all whorls are exposed. Sides bear strong sharp ribs that are straight until reaching the ventrolateral edge where they swing forward and fade. The rim (venter) is keeled and free of grooves. ''Arnioceras'', named by Alpheus Hyatt, is included in the arietitid family of the Psiloceratoidea Psiloceratoidea is a superfamily of Early Jurassic ammonoid cephalopods proposed by Hyatt in 1867, assigned to the order Ammonitida. They were very successful during Hettangian and Sinemurian. Last of them, family Cymbitidae and genera ''Hypoxy ..., an ammonitid supefamily. Its distribution is fairly worldwide, having been found in Europe, south Asia, and North and South America. References ;Notes ;Bibliography * Jurassic ammonites Jurassic ammonites of North America Ammonitida genera Early Jurassic ammonites Hasle Formation Taxa named by Al ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arnioceras Miserabile
''Arnioceras'' is an extinct genus of large, evolute, discoidal ammonite from the Lower Jurassic. The shell is normally coiled so that all whorls are exposed. Sides bear strong sharp ribs that are straight until reaching the ventrolateral edge where they swing forward and fade. The rim (venter) is keeled and free of grooves. ''Arnioceras'', named by Alpheus Hyatt, is included in the arietitid family of the Psiloceratoidea Psiloceratoidea is a superfamily of Early Jurassic ammonoid cephalopods proposed by Hyatt in 1867, assigned to the order Ammonitida. They were very successful during Hettangian and Sinemurian. Last of them, family Cymbitidae and genera ''Hypoxy ..., an ammonitid supefamily. Its distribution is fairly worldwide, having been found in Europe, south Asia, and North and South America. References ;Notes ;Bibliography * Jurassic ammonites Jurassic ammonites of North America Ammonitida genera Early Jurassic ammonites Hasle Formation Taxa named by Al ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arnioceras Fieldingiceroides
''Arnioceras'' is an extinct genus of large, evolute, discoidal ammonite from the Lower Jurassic. The shell is normally coiled so that all whorls are exposed. Sides bear strong sharp ribs that are straight until reaching the ventrolateral edge where they swing forward and fade. The rim (venter) is keeled and free of grooves. ''Arnioceras'', named by Alpheus Hyatt, is included in the arietitid family of the Psiloceratoidea Psiloceratoidea is a superfamily of Early Jurassic ammonoid cephalopods proposed by Hyatt in 1867, assigned to the order Ammonitida. They were very successful during Hettangian and Sinemurian. Last of them, family Cymbitidae and genera ''Hypoxy ..., an ammonitid supefamily. Its distribution is fairly worldwide, having been found in Europe, south Asia, and North and South America. References ;Notes ;Bibliography * Jurassic ammonites Jurassic ammonites of North America Ammonitida genera Early Jurassic ammonites Hasle Formation Taxa named by Al ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arnioceras Ceratitoides
''Arnioceras'' is an extinct genus of large, evolute, discoidal ammonite from the Lower Jurassic. The shell is normally coiled so that all whorls are exposed. Sides bear strong sharp ribs that are straight until reaching the ventrolateral edge where they swing forward and fade. The rim (venter) is keeled and free of grooves. ''Arnioceras'', named by Alpheus Hyatt, is included in the arietitid family of the Psiloceratoidea Psiloceratoidea is a superfamily of Early Jurassic ammonoid cephalopods proposed by Hyatt in 1867, assigned to the order Ammonitida. They were very successful during Hettangian and Sinemurian. Last of them, family Cymbitidae and genera ''Hypoxy ..., an ammonitid supefamily. Its distribution is fairly worldwide, having been found in Europe, south Asia, and North and South America. References ;Notes ;Bibliography * Jurassic ammonites Jurassic ammonites of North America Ammonitida genera Early Jurassic ammonites Hasle Formation Taxa named by Al ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arnioceras Arnouldi
''Arnioceras'' is an extinct genus of large, evolute, discoidal ammonite from the Lower Jurassic. The shell is normally coiled so that all whorls are exposed. Sides bear strong sharp ribs that are straight until reaching the ventrolateral edge where they swing forward and fade. The rim (venter) is keeled and free of grooves. ''Arnioceras'', named by Alpheus Hyatt, is included in the arietitid family of the Psiloceratoidea Psiloceratoidea is a superfamily of Early Jurassic ammonoid cephalopods proposed by Hyatt in 1867, assigned to the order Ammonitida. They were very successful during Hettangian and Sinemurian. Last of them, family Cymbitidae and genera ''Hypoxy ..., an ammonitid supefamily. Its distribution is fairly worldwide, having been found in Europe, south Asia, and North and South America. References ;Notes ;Bibliography * Jurassic ammonites Jurassic ammonites of North America Ammonitida genera Early Jurassic ammonites Hasle Formation Taxa named by Al ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arnioceras Speciosum
''Arnioceras'' is an extinct genus of large, evolute, discoidal ammonite from the Lower Jurassic. The shell is normally coiled so that all whorls are exposed. Sides bear strong sharp ribs that are straight until reaching the ventrolateral edge where they swing forward and fade. The rim (venter) is keeled and free of grooves. ''Arnioceras'', named by Alpheus Hyatt, is included in the arietitid family of the Psiloceratoidea Psiloceratoidea is a superfamily of Early Jurassic ammonoid cephalopods proposed by Hyatt in 1867, assigned to the order Ammonitida. They were very successful during Hettangian and Sinemurian. Last of them, family Cymbitidae and genera ''Hypoxy ..., an ammonitid supefamily. Its distribution is fairly worldwide, having been found in Europe, south Asia, and North and South America. References ;Notes ;Bibliography * Jurassic ammonites Jurassic ammonites of North America Ammonitida genera Early Jurassic ammonites Hasle Formation Taxa named by Al ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alpheus Hyatt
Alpheus Hyatt (April 5, 1838 – January 15, 1902) was an American zoologist and palaeontologist. Biography Alpheus Hyatt II was born in Washington, D.C. to Alpheus Hyatt and Harriet Randolph (King) Hyatt. He briefly attended the Maryland Military Academy and Yale University, and after graduating from Harvard University in 1862, he enlisted as a private in the Massachusetts Volunteer Infantry for the Civil War, emerging with the rank of captain. After the war he worked for a time at the Essex Institute (now the Peabody Essex Museum in Salem, Massachusetts. He and a colleague founded ''American Naturalist'' and Hyatt served as editor from 1867 to 1870. He became a professor of paleontology and zoology at Massachusetts Institute of Technology in 1870, where he taught for eighteen years, and was professor of biology and zoology at Boston University from 1877 until his death in 1902. He also served as curator of the Boston Society of Natural History, where his longtime a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
