Aplococeratidae

	Aplococeratidae Aplococeratidae is a family of Ceratitida, ceratitids from the Middle Triassic with very simplified sutures and a tendency to lose their ornamentation. Shells are generally evolute, more or less compressed, with rounded venters. Ornamentation if present consists of umbilical ribs that disappear outwardly, toward the venter. The suture is ceratitic or goniatitic. Arkell ''et al.'' (1957), in the Treatise on Invertebrate Paleontology, Treatise on Invertebrate Paleontology, Part L included the Aplococeraitdae in the Ceratitaceae, whereas E. T. Tozer in 1981 includes them in the Danubitaceae, established by Spath, also in 1951. Genera included in the Aplococeratidae are ''Aplococeras'' (type), ''Apleuroceras'', ''Epiceratites'', ''Laboceras'', ''Metadinarites'', ''Pseudaplococeras'', and ''Velebites''. References Sources Arkell, ''et al'', 1957. Mesozoic Ammonoidea; Treatise on Invertebrate Paleontology, Part L (''L''157-158). Geological Society of America and University of Kansa ... [...More Info...] [...Related Items...] OR:* [Wikipedia] [Google] [Baidu]
	Ceratitaceae Ceratitoidea, formerly Ceratitaceae, is an ammonite superfamily in order Ceratitida characterized in general by highly ornamented or tuberculate shells with ceratitic sutures that may become goniatitic or ammonitic in some offshoots. (Arkell ''et al.'' 1962) Phylo-taxonomy The Ceratitoidea, according to the ''Treatise on Invertebrate Paleontology'' (fig. 149, L104) can be divided into the Lower Triassic Hellenitidae, Dinaritidae, Tirolitidae, and Stephanitidae; the essentially lower Middle Triassic Acrochordiceratidae, Beyrichitidae, and Proteusitidae; and the lower Middle and post lower Middle Triassic Ceratitidae and its descendant families. Families descendent from the Ceratidae are the Aplococeratidae and possibly or coeval, the Balatonitidae, Danubitidae, and Hungaritidae, and from the Hungaritidae, the Carnitidae. Of these the Balatonitidae and Danubitidae are restricted to the Anisian (lower Middle Triassic); the Ceratitidae and Hungaritidae to the Anisian an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Apleuroceras ''Apleuroceras'' is a genus of ceratitid ammonites with an essentially smooth evolute shell with a subquadrade whorl section and a ceratitic suture with two lateral lobes (on either side). ''Apleuroceras'' belongs to the Aplococeratidae and has been found in middle Triassic formations of Ladinian age in Hungary and the Alps. References * Arkell ''et al'' 1957. Mesozoic Ammonoidea; Treatise on Invertebrate Paleontology The ''Treatise on Invertebrate Paleontology,'' published from 1953–2007 by the Geological Society of America and the University of Kansas, then 2009–present by the University of Kansas Paleontological Institute, is a definitive multi-authore ..., Part L (''L''158). Geological Society of America and University Kansas Press.Paleobiology database ''Apleuroceras'' entryaccessed 9 December 2011 Aplococeratidae Middle Triassic ammonites Ceratitida genera Triassic ammonites of Europe {{Ceratitida-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Velebites ''Velebites'' is a genus of middle Triassic ammonites from the Balkans belonging to the Aplococeratidae, a family within the Ceratitida. It is somewhat similar to '' Aplococeras'' in external form. The shell is evolute, discoidal with convex converging whorl sides and rounded venter. Ribs are more recurved than in ''Aplococeras'' and the suture is ceratitic rather than goniatitic. References * Treatise on Invertebrate Paleontology The ''Treatise on Invertebrate Paleontology,'' published from 1953–2007 by the Geological Society of America and the University of Kansas, then 2009–present by the University of Kansas Paleontological Institute, is a definitive multi-authore ... Part L Mollusca 4 Aplococeratidae Ceratitida genera Triassic animals of Asia {{Ceratitida-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Danubitaceae The Danubitoidea is a large and diverse superfamily in the order Ceratitida of the Ammonoidea that combines five families removed from the Ceratitaceae, Clydonitaceae, and Ptychitaceae. Taxonomy Superfamily Danubitoidea * Family Aplococeratidae * Family Danubitidae * Family Lecanitidae * Family Longobarditidae * Family Nannitidae The largest family in the Danubitoidea is the Longobarditidae with 11 genera distributed among three subfamilies plus three of undetermined placement. Smallest families are the Lecanitidae and Nannitidae, each represented by a single genus. Distribution and range Fossils of the Danubitoidea have been found in the Triassic of Afghanistan, Russia, China, Papua New Guinea; Italy, Switzerland, Hungary; British Columbia, Yukon, Nunavut; Idaho, Nevada, and California. References Classification of E. T. Tozer 1981E. T. Tozer. 1981. Triassic Ammonoidea: Classification, evolution and relationship with Permian and Jurassic Forms. The Ammonoidea: The evol ... [...More Info...] [...Related Items...] OR:* [Wikipedia] [Google] [Baidu]
	Aplococeras ''Aplococeras'' is an evolute discoidal ceratitid ammonite from the Middle Triassic Ladinian stage, found in southern Europe and Nevada. Whorl sides are convex, converging on a rounded venter (the outer rim), and are ornamented with slightly flexuous umbilical ribs that disappear outwardly, towards the venter. The suture has two lateral lobes (on either side). ''Apleuroceras'' and ''Velebites ''Velebites'' is a genus of middle Triassic ammonites from the Balkans belonging to the Aplococeratidae, a family within the Ceratitida. It is somewhat similar to '' Aplococeras'' in external form. The shell is evolute, discoidal with convex con ...'' are related genera also from the Ladinian (Middle Triassic). References * Arkel,''et al'', 1957. Mesozoic Ammonoidea; Treatise in Invertebrate Paleontology Part L (''L''158). Geological Society of America and University Kansas Press. Paleobiology Database ''Aplococeras'' entryaccessed 9 December 2011 Aplococeratidae Middle Triassic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Ceratitida Ceratitida is an order that contains almost all ammonoid cephalopod genera from the Triassic as well as ancestral forms from the Upper Permian, the exception being the phylloceratids which gave rise to the great diversity of post-Triassic ammonites. Ceratitids overwhelmingly produced planospirally coiled discoidal shells that may be evolute with inner whorls exposed or involute with only the outer whorl showing. In a few later forms the shell became subglobular, in others, trochoidal or uncoiled. Sutures are typically ceratitic, with smooth saddles and serrate or digitized lobes. In a few the sutures are goniatitic while in others they are ammonitic. Taxonomy * Ceratitida Ceratitoidea Choristoceratoidea Clydonitoidea Danubitoidea Dinaritoidea Lobitoidea Meekoceratoidea Megaphyllitoidea Nathorstitoidea Noritoidea Otoceratoidea Pinacoceratoidea Ptychitoidea Sageceratoidea Tropitoidea Xenodiscoidea Only eight superfamilies ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Middle Triassic In the geologic timescale, the Middle Triassic is the second of three epoch (geology), epochs of the Triassic period (geology), period or the middle of three series (stratigraphy), series in which the Triassic system (stratigraphy), system is divided in chronostratigraphy. The Middle Triassic spans the time between annum, Ma and Ma (million years ago). It is preceded by the Early Triassic Epoch and followed by the Late Triassic Epoch. The Middle Triassic is divided into the Anisian and Ladinian age (geology), ages or stage (stratigraphy), stages. Formerly the middle series in the Triassic was also known as Muschelkalk. This name is now only used for a specific unit of stratum, rock strata with approximately Middle Triassic age, found in western Europe. Middle Triassic life Following the Permian–Triassic extinction event, the most devastating of all mass-extinctions, life recovered slowly. In the Middle Triassic, many groups of organisms reached higher diversity again, s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Treatise On Invertebrate Paleontology The ''Treatise on Invertebrate Paleontology,'' published from 1953–2007 by the Geological Society of America and the University of Kansas, then 2009–present by the University of Kansas Paleontological Institute, is a definitive multi-authored work of currently 55 volumes, written by more than 300 paleontologists, and covering every phylum, class, order, family, and genus of fossil and extant (still living) invertebrate animals. The prehistoric invertebrates are described as to their taxonomy, morphology, paleoecology, stratigraphic and paleogeographic range. However, taxa with no fossil record whatsoever have just a very brief listing. Publication of the decades-long ''Treatise on Invertebrate Paleontology'' is a work-in-progress; and therefore it is not yet complete: For example, there is no volume yet published regarding the post- Paleozoic era caenogastropods (a molluscan group including the whelk and periwinkle). Furthermore, when needed, previously published vol ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]