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Euomphalina
The Euomphalina comprise a major suborder of mainly Paleozoic archaeogastropods, shells of which are hyperstophic to depressed orthstrophic, commonly with an angulation at the outer upper whorl surface thought to be coincident with the exhalent channel; shell wall thick, outer layer calcitic, inner layers aragonitic but not nacreous; operculum calcareous and heavy. Their range is from the Upper Cambrian to the Triassic, and possibly as high as the Upper Cretaceous.J. Brooks Knight ''et al'' 1960. Systematic Descriptions (''of gastropods''). Treatise on Invertebrate Paleontology Part I, Mollusca 1.(1960) Suborder Macluritina pp I 184 - I 196. The suborder Euomphalina de Koninck 1881 is synonymous with Macluritina (Cox and Knight 1960). The suborder Euomphalina includes the extinct superfamilies Euomphaloidea, Macluritoidea, Ophiletoidea, and Platyceratoidea. Taxonomy J.B. Knight ''et al'' 1960, in the Treatise Part I recognize two superfamilies in the Euomphalina (or Macluri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Euomphaloidea
Euomphaloidea, originally Euomphalacea, is an extinct superfamily of marine molluscs that lived from the Early Ordovician to the Late Cretaceous, included in the Gastropoda Moore R. C., Lalicker & Fischer (1952). ''Invertebrate Fossils''. McGraw-Hill publisher. but speculated as instead perhaps Monoplacophora. Description Euomphaloid shells are mostly discoidal and may be either orthostrophic (coils wrapped around an erect cone) or hyperstrophic (coils wrapped around an inverted cone); are widely umbilicate and commonly have a channel, presumed exhalent, within the angulation in the outer part of the upper whorl surface. The shell wall is relatively thick, with an external prismatic layer of calcite, which may be pigmented, and an internal layer of lamellar, but not nacreous, aragonite.(1960). ''Treatise on Invertebrate Paleontology. Part I, Gastropoda. Taxonomy As with almost all fossils, the taxonomic relations of and within the euophaloids can only be inferred from their rem ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eogastropoda
Eogastropoda was a previously used taxonomic category of snails or gastropods, a subclass which was erected by Ponder and Lindberg in 1997. It was one of two great divisions (subclasses) of the class Gastropoda, the snails. The other subclass of gastropods was the Orthogastropoda. Eogastropoda were the more primitive of the two subclasses, representing a much older line of gastropods. This subclass contained all of the true limpets. Orders Orders within the Eogastropoda consisted of: * Patellogastropoda The Patellogastropoda, common name true limpet Limpets are a group of aquatic snails that exhibit a conical shell shape (patelliform) and a strong, muscular foot. Limpets are members of the class Gastropoda, but are polyphyletic, meaning th ... * Euomphalina (fossil) * Neomphalida External links Eogastropoda at palaeos.com Obsolete gastropod taxa Mollusc subclasses Taxa named by Winston Ponder {{Gastropod-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Animalia
Animals are multicellular, eukaryotic organisms in the biological kingdom Animalia. With few exceptions, animals consume organic material, breathe oxygen, are able to move, can reproduce sexually, and go through an ontogenetic stage in which their body consists of a hollow sphere of cells, the blastula, during embryonic development. Over 1.5 million living animal species have been described—of which around 1 million are insects—but it has been estimated there are over 7 million animal species in total. Animals range in length from to . They have 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 bilaterally symmetric body plan. The Bilateria include the protostomes, containing animals such as nematodes, arthropods, flatworms, annelids and molluscs, and the deuterostomes, containing the echinode ... [...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 Common periwinkle, periwinkle). Furthermore, every so often, previously published volumes of the ''Treatise'' are revised. Evolution of the proje ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Taxonomy Of The Gastropoda (Bouchet & Rocroi, 2005)
The taxonomy of the Gastropoda as it was revised in 2005 by Philippe Bouchet and Jean-Pierre Rocroi is a system for the scientific classification of gastropod mollusks. (Gastropods are a taxonomic class of animals which consists of snails and slugs of every kind, from the land, from freshwater, and from saltwater.) The paper setting out this taxonomy was published in the journal ''Malacologia''. The system encompasses both living and extinct groups, as well as some fossils whose classification as gastropods is uncertain. The Bouchet & Rocroi system was the first complete gastropod taxonomy that primarily employed the concept of clades, and was derived from research on molecular phylogenetics; in this context a clade is a "natural grouping" of organisms based upon a statistical cluster analysis. In contrast, most of the previous overall taxonomic schemes for gastropods relied on morphological features to classify these animals, and used taxon ranks such as order, superorder ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trochina
The Trochina is a taxon that is used by paleontologists. It is a suborder of primitive sea snails, marine gastropod The gastropods (), commonly known as snails and slugs, belong to a large taxonomic class of invertebrates within the phylum Mollusca called Gastropoda (). This class comprises snails and slugs from saltwater, from freshwater, and from land. T ... mollusks. Description These snails have mostly conically coiled shells in which the spire is typically low to moderate in height. More rarely the shell is discoidal in coiling. The outer lip simple. The internal layers of the shell are aragonitic and nacreous, in some species completely so. The operculum, where known, is calcareous or corneous, and spiral in structure.Knight J. B. et al. (1960). Systematic Descriptions, Treatise on Invertebrate Paleontology. Part I(1). Taxonomy J. Brookes Knight, ''et al.'', in the Treatise on Invertebrate Paleontology divided the Trochina into five superfamilies: the Anom ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Palaeotrochoidea
Palaeotrochidae is an extinct family of fossil snails, gastropod mollusks in the clade Neritimorpha according to the taxonomy of the Gastropoda (Bouchet & Rocroi, 2005). This is the only family in the superfamily Palaeotrochoidea. This family has no subfamilies. Genera Genera within the family Paleotrochidae include: * '' Palaeotrochus'' Hall, 1879 - type genus In biological taxonomy, the type genus is the genus which defines a biological family and the root of the family name. Zoological nomenclature According to the International Code of Zoological Nomenclature, "The name-bearing type of a nominal f ... * '' Floyda'' Webster, 1905 * '' Turbonopsis'' Grabau and Shimer 1909 * '' Westerna'' Webster, 1905 * '' Westwooditrochus'' Cook 1998 References {{Neritimorpha-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oriostomatoidea
†Oriostomatoidea is an extinct superfamily of fossil sea snails, marine gastropod The gastropods (), commonly known as snails and slugs, belong to a large taxonomic class of invertebrates within the phylum Mollusca called Gastropoda (). This class comprises snails and slugs from saltwater, from freshwater, and from land. T ... mollusks in the clade Neritimorpha. Taxonomy Families within the superfamily Oriostomatoidea are as follows: * † Family Oriostomatidae * † Family Tubinidae References * Koken, E. (1896). ''Die Gastropoden der Trias um Hallstadt.'' Jahrbuch der Kaiserlich-Königlichen Geologischen Reichsanstalt. 46(1): 37−126 * W. Wenz. 1938. Handbuch der Paläozoologie; Gastropoda. Handbuch der Paläozoologie Prehistoric gastropods {{Neritimorpha-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Taxonomic Rank
In biological classification, taxonomic rank is the relative level of a group of organisms (a taxon) in an ancestral or hereditary hierarchy. A common system consists of species, genus, family (biology), family, order (biology), order, class (biology), class, phylum (biology), phylum, kingdom (biology), kingdom, domain (biology), domain. While older approaches to taxonomic classification were phenomenological, forming groups on the basis of similarities in appearance, organic structure and behaviour, methods based on genetic analysis have opened the road to cladistics. A given rank subsumes under it less general categories, that is, more specific descriptions of life forms. Above it, each rank is classified within more general categories of organisms and groups of organisms related to each other through inheritance of phenotypic trait, traits or features from common ancestors. The rank of any ''species'' and the description of its ''genus'' is ''basic''; which means that to iden ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
