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Lyrogoniatites
''Lyrogoniatitites'' is a neoglyphioceratoidean ammonite, in the order Goniatitida, related to genera like ''Alaoceras'', '' Cravenoceras'', '' Dumbarigloria'' and ''Pachylyroceras''. Description ''Lyrogoniatites'' is similar to '' Neoglyphioceras'', but with broader shell and a smaller number (30-60) of longitudinal lirae and with a ventral (hyponomic) sinus and ventrolateral salients (projections) in all growth stages. As with ''Neoglyphioceras'' the ventral lobe is rather narrow. Taxonomic relations W.M. Furnish, et al., 2009, in the revised Treatise includes ''Lyrogoniatites'' in the neoglyphioceratid subfamily, Lyrogoniatitinae, along with ''Alaoceras'', ''Caenolyroceras'', ''Dombarigloria'', and ''Pachylyroceras''. D. Korn (2006) on the other hand put ''Lyrogoniatites'' in the neoglyphioceratacean family Cravenoceratidae instead, and in the subfamily Lyrogoniatitinae along with such as ''Caenolyroceras'' and ''Pachylyroceras''. Others, (e.g. GONIAT) also include ''Lyrogo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pachylyroceras
''Pachylyroceras'' is a large, generally subglobular, Upper Mississippian gonitite and included in the cephalopod subclass Ammonoidea. Recognition ''Pachylyroceras'' produced a large shell that is moderately evolute to moderately involute and thickly discoidal to subglobular, with a rather wide umbilicus. Surface sculpture consists of coarse, widely spaced longitudinal lirae. Constrictions where present are wide and deep. Its suture has a narrow bifurcated ventral lobe with slightly divergent to subparallel sides and a median saddle less than half the height. Taxonomic position ''Pachylyroceras'', named by Ruzhentsev & Bogoslovskaia (1971), is included in the Neoglyphiocerataceae, (sometimes written Neoglyphioceratoidea), but its position within the superfamily varies according to whose classification. The revised version of the Treatise, Part L (W. M. Furnish et al. 2009 ) includes ''Pachylyroceras'' as well as '' Alaoceras'', '' Caenolyroceras'', '' Dombarigloria'', and ' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lyrogoniatitinae
Lyrogoniatitinae is one of two subfamilies of the family Cravenoceratidae. They are an extinct group of ammonoid, which are shelled cephalopods related to squids, belemnites, octopuses, and cuttlefish, and more distantly to the nautiloid Nautiloids are a group of marine cephalopods ( Mollusca) which originated in the Late Cambrian and are represented today by the living ''Nautilus'' and ''Allonautilus''. Fossil nautiloids are diverse and speciose, with over 2,500 recorded species ...s. References The Paleobiology Databaseaccessed on 10/01/07 Cravenoceratidae {{Goniatitida-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cravenoceras
''Cravevoceras'' is an Upper Paleozoic ammonite in the goniatite family Cravenoceratidae, probably derived from ''Pachylyroceras'' and contemporary with other cravenoceratid genera like '' Caenolyroceras'', '' Tympanoceras'' and later ''Alaoceras'' and '' Lyrogoniatites''. It is also a member of the Neoglyphioceratoidea. Description The shell of ''Cravenoceras'' is thickly discoidal to globose and moderately to widely umbilicate. Young stages are mostly extremely evolute. Sculpture consists of transverse lamellae, which are more or less straight on the flanks, but form a shallow ventral sinus. Longitudinal lirae mostly absent or very faint, sometimes restricted to umbilical shoulder. Constrictions are weak or absent. The ventral lobe is narrow, with a relatively low median saddle. Taxonomic position The revised Treatise (Furnish et al. 2009) includes ''Cravenoceras'' in the family Cravenoceratidae and subfamily Cravenoceratinae, along with 8 other genera including '' Tympan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mississippian Age
The Mississippian ( , also known as Lower Carboniferous or Early Carboniferous) is a subperiod in the geologic timescale or a subsystem of the geologic record. It is the earlier of two subperiods of the Carboniferous period lasting from roughly 358.9 to 323.2 million years ago. As with most other geochronologic units, the rock beds that define the Mississippian are well identified, but the exact start and end dates are uncertain by a few million years. The Mississippian is so named because rocks with this age are exposed in the Mississippi Valley. The Mississippian was a period of marine transgression in the Northern Hemisphere: the sea level was so high that only the Fennoscandian Shield and the Laurentian Shield were dry land. The cratons were surrounded by extensive delta systems and lagoons, and carbonate sedimentation on the surrounding continental platforms, covered by shallow seas. In North America, where the interval consists primarily of marine limestones, it i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fossils Of Kazakhstan
A fossil (from Classical Latin , ) is any preserved remains, impression, or trace of any once-living thing from a past geological age. Examples include bones, shells, exoskeletons, stone imprints of animals or microbes, objects preserved in amber, hair, petrified wood and DNA remnants. The totality of fossils is known as the ''fossil record''. Paleontology is the study of fossils: their age, method of formation, and evolutionary significance. Specimens are usually considered to be fossils if they are over 10,000 years old. The oldest fossils are around 3.48 billion years old to 4.1 billion years old. Early edition, published online before print. The observation in the 19th century that certain fossils were associated with certain rock strata led to the recognition of a geological timescale and the relative ages of different fossils. The development of radiometric dating techniques in the early 20th century allowed scientists to quantitatively measure the a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Goniatitida Genera
Goniatids, informally goniatites, are ammonoid cephalopods that form the order Goniatitida, derived from the more primitive Agoniatitida during the Middle Devonian some 390 million years ago (around Eifelian stage). Goniatites (goniatitids) survived the Late Devonian extinction to flourish during the Carboniferous and Permian only to become extinct at the end of the Permian some 139 million years later. Morphology All goniatites possessed an external shell, which is divided internally into chambers filled with gas giving it buoyancy during the life of the animal. An open chamber at the front of the shell provided living space for the goniatitid animal, with access to open water through a ventral siphuncle. The general morphology and habit of goniatites was probably similar to that of their later relatives the ammonites, being free swimming and possessing a head with two well developed eyes and arms (or tentacles). Goniatite shells are small to medium in size, almost always ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mississippian Ammonites
{{Disambiguation ...
Mississippian may refer to: *Mississippian (geology), a subperiod of the Carboniferous period in the geologic timescale, roughly 360 to 325 million years ago *Mississippian culture, a culture of Native American mound-builders from 900 to 1500 AD *Mississippian Railway, a short line railroad *A native of Mississippi See also *Mississippi (other) Mississippi is a state of the United States of America. Mississippi may also refer to: Places * Mississippi River, a river in central United States * Mississippi River System, a system of rivers in the Mississippi River watershed * Mississippi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Goniatitidae
Goniatitidae is one of three families included in the ammonoid cephalopod superfamily Goniatitoidea, known from the Lower Mississippian to the Upper Permian The Permian ( ) is a geologic period and stratigraphic system which spans 47 million years from the end of the Carboniferous Period million years ago (Mya), to the beginning of the Triassic Period 251.9 Mya. It is the last period of the Pale .... They have sutures that form 8 lobes and characteristically lack sculpture. The ventral lobe, as for the superfamily, is bifurcated. References * Miller, Furnish, and Schindewolf 1957. Paleozoic Ammonoidea; ''Treatise on Invertebrate Paleontology'', Part L Ammonoidea. Geologocial Society of America and Univ of Kansas Press. GoniatitidaePaleo db 9/07/13 Goniatitida families Goniatitoidea {{Goniatitida-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Treatise On Invertebrate Paleontology
The ''Treatise on Invertebrate Paleontology'' (or ''TIP'') published by the Geological Society of America and the University of Kansas Press, is a definitive multi-authored work of some 50 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, every so often, previously published volumes of the ''Treatise'' are revised. Evolution of the project Raymond C. Moor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cravenoceratidae
The Cravenoceratidae is one of six families included in the ammonoid superfamily Neoglyphioceratoidea, which lived during the latter part of the Paleozoic The Paleozoic (or Palaeozoic) Era is the earliest of three geologic eras of the Phanerozoic Eon. The name ''Paleozoic'' ( ;) was coined by the British geologist Adam Sedgwick in 1838 by combining the Greek words ''palaiós'' (, "old") and ' ... era. Cravenoceratid genera have moderately evolute to involute, broad or thickly discoidal shells with a moderately narrow umbilicus. The surface is generally smooth, dominated by growth striae. Spiral ornamentation may be present, but reticulate ornament is absent. The ventral lobe is double pronged and relatively narrow, with the median saddle in most forms less than half of height of entire lobe itself. References The Paleobiology Database10/01/07 10/15/11 * Saunders, Work, and Nikolaeva, 1999. Evolution of Complexity in Paleozoic Ammonoid Sutures, Supplementary Material ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Neoglyphioceratoidea
Neoglyphioceratoidea is one of seventeen superfamilies of the Goniatitina suborder. They are an extinct group of ammonoid, which are shelled cephalopods related to squids, belemnites, octopodes, and cuttlefish, and more distantly to the nautiloid Nautiloids are a group of marine cephalopods ( Mollusca) which originated in the Late Cambrian and are represented today by the living ''Nautilus'' and '' Allonautilus''. Fossil nautiloids are diverse and speciose, with over 2,500 recorded speci ...s. References The Paleobiology Databaseaccessed on 10/01/07 Goniatitida superfamilies Goniatitina {{Goniatitida-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
