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Admetula Sphaericula
''Admetula sphaericula'' is an extinct species of sea snail, a marine gastropod mollusk in the family Cancellariidae, also referred to as the nutmeg snails. MolluscaBase eds. (2024). MolluscaBase. Admetula sphaericula (Cossmann, 1889) †. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=1571591 on 2024-05-04 Description The length of the shell attains 10 mm, its diameter 7 mm. Distribution Fossils have been found in Eocene strata in Picardy Picardy (; Picard language, Picard and , , ) is a historical and cultural territory and a former regions of France, administrative region located in northern France. The first mentions of this province date back to the Middle Ages: it gained it ..., France. References External links Cossmann M. (1889). Catalogue illustré des coquilles fossiles de l'Éocène des environs de Paris. Annales de la Société Royale Malacologique de Belgique. 24: 3-381, pl. 1-12 sphaericula ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Species
A species () is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can produce fertile offspring, typically by sexual reproduction. It is the basic unit of Taxonomy (biology), classification and a taxonomic rank of an organism, as well as a unit of biodiversity. Other ways of defining species include their karyotype, DNA sequence, morphology (biology), morphology, behaviour, or ecological niche. In addition, palaeontologists use the concept of the chronospecies since fossil reproduction cannot be examined. The most recent rigorous estimate for the total number of species of eukaryotes is between 8 and 8.7 million. About 14% of these had been described by 2011. All species (except viruses) are given a binomial nomenclature, two-part name, a "binomen". The first part of a binomen is the name of a genus to which the species belongs. The second part is called the specific name (zoology), specific name or the specific ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sea Snail
Sea snails are slow-moving marine (ocean), marine gastropod Mollusca, molluscs, usually with visible external shells, such as whelk or abalone. They share the Taxonomic classification, taxonomic class Gastropoda with slugs, which are distinguished from snails primarily by the absence of a visible Gastropod shell, shell. Definition Determining whether some gastropods should be called sea snails is not always easy. Some species that live in brackish water (such as certain Neritidae, neritids) can be listed as either freshwater snails or marine snails, and some species that live at or just above the high tide level (for example, species in the genus ''Truncatella (gastropod), Truncatella'') are sometimes considered to be sea snails and sometimes listed as land snails. Anatomy Sea snails are a very large and diverse group of animals. Most snails that live in salt water respire using a gill or gills; a few species, though, have a lung, are intertidal, and are active only at low tide w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gastropod
Gastropods (), commonly known as slugs and snails, belong to a large Taxonomy (biology), taxonomic class of invertebrates within the phylum Mollusca called Gastropoda (). This class comprises snails and slugs from saltwater, freshwater, and from the land. There are many thousands of species of sea snails and sea slug, slugs, as well as freshwater snails, freshwater limpets, land snails and slugs. The class Gastropoda is a diverse and highly successful class of mollusks within the phylum Mollusca. It contains a vast total of named species, second only to the insects in overall number. The fossil history of this class goes back to the Furongian, Late Cambrian. , 721 family (taxonomy), families of gastropods are known, of which 245 are extinct and appear only in the fossil record, while 476 are currently neontology, extant living fossil, with or without a fossil record. Gastropoda (previously known as univalves and sometimes spelled "Gasteropoda") are a major part of the phylum Mo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mollusk
Mollusca is a phylum of protostomic invertebrate animals, whose members are known as molluscs or mollusks (). Around 76,000 extant species of molluscs are recognized, making it the second-largest animal phylum after Arthropoda. The number of additional fossil species is estimated between 60,000 and 100,000, and the proportion of undescribed species is very high. Many taxa remain poorly studied. Molluscs are the largest marine phylum, comprising about 23% of all the named marine organisms. They are highly diverse, not just in size and anatomical structure, but also in behaviour and habitat, as numerous groups are freshwater and even terrestrial species. The phylum is typically divided into 7 or 8 taxonomic classes, of which two are entirely extinct. Cephalopod molluscs, such as squid, cuttlefish, and octopuses, are among the most neurologically advanced of all invertebrates—and either the giant squid or the colossal squid is the largest known extant i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Family (biology)
Family (, : ) is one of the eight major hierarchical taxonomic ranks in Linnaean taxonomy. It is classified between order and genus. A family may be divided into subfamilies, which are intermediate ranks between the ranks of family and genus. The official family names are Latin in origin; however, popular names are often used: for example, walnut trees and hickory trees belong to the family Juglandaceae, but that family is commonly referred to as the "walnut family". The delineation of what constitutes a family—or whether a described family should be acknowledged—is established and decided upon by active taxonomists. There are not strict regulations for outlining or acknowledging a family, yet in the realm of plants, these classifications often rely on both the vegetative and reproductive characteristics of plant species. Taxonomists frequently hold varying perspectives on these descriptions, leading to a lack of widespread consensus within the scientific community ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cancellariidae
Cancellariidae, common name the nutmeg snails or nutmeg shells, are a family (biology), family of small to medium-large sea snails, marine (ocean), marine gastropod mollusks in the clade Neogastropoda. Some of the shells of the species in this family resemble a nutmeg seed. Distribution This family occurs worldwide. Many species are found in deep water. Taxonomy This family consists of three following subfamilies (according to the Taxonomy of the Gastropoda (Bouchet & Rocroi, 2005), taxonomy of the Gastropoda by Bouchet & Rocroi, 2005): * Cancellariinae Forbes & Hanley, 1851 - synonym: Trigonostomatinae Cossmann, 1899 * Admetinae Troschel, 1865 - synonym: Paladmetidae Stephenson, 1941 * Plesiotritoninae Beu & Maxwell, 1937 Genera Genera in the family Cancellariidae include: *''Admete (genus), Admete'' Henrik Nikolaj Krøyer, Krøyer, 1842 *''Admetula'' Maurice Cossmann, Cossmann, 1889 *''Africotriton'' Beu & Bruce Marshall (taxonomist), Marshall, 1987 *''Agatrix'' R. Petit, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eocene
The Eocene ( ) is a geological epoch (geology), epoch that lasted from about 56 to 33.9 million years ago (Ma). It is the second epoch of the Paleogene Period (geology), Period in the modern Cenozoic Era (geology), Era. The name ''Eocene'' comes from the Ancient Greek (''Ēṓs'', 'Eos, Dawn') and (''kainós'', "new") and refers to the "dawn" of modern ('new') fauna that appeared during the epoch.See: *Letter from William Whewell to Charles Lyell dated 31 January 1831 in: * From p. 55: "The period next antecedent we shall call Eocene, from ήως, aurora, and χαινος, recens, because the extremely small proportion of living species contained in these strata, indicates what may be considered the first commencement, or ''dawn'', of the existing state of the animate creation." The Eocene spans the time from the end of the Paleocene Epoch to the beginning of the Oligocene Epoch. The start of the Eocene is marked by a brief period in which the concentration of the carbon isoto ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Picardy
Picardy (; Picard language, Picard and , , ) is a historical and cultural territory and a former regions of France, administrative region located in northern France. The first mentions of this province date back to the Middle Ages: it gained its first official recognition in the 13th century through the nation of Picardy at the University of Paris and entered French administration in the 14th century. Unlike regions such as Normandy, Brittany, or Champagne (province), Champagne, Picardy was never established as a duchy, county, or principality, and its boundaries fluctuated over the centuries due to the political instability in the area it covered. Since 1 January 2016, it has been part of the new region of Hauts-de-France. The first geographic description of Picardy appeared in the late central Middle Ages, including the bishoprics of Amiens, Beauvais, Arras, Tournai, and Thérouanne. In the late Middle Ages, it also encompassed Saint-Quentin, Douai, Abbeville, Béthune, Clermo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Admetula
''Admetula'' is a genus of sea snails, marine gastropod mollusks in the family (biology), family Cancellariidae, the nutmeg snails. Species Species within the genus ''Admetula'' include: * ''Admetula affluens'' Bouchet & Petit, 2008 * ''Admetula afra'' Petit & Harasewych, 2000 * ''Admetula atopodonta'' (Petit & Harasewych, 1986) * ''Admetula bathynoma'' Bouchet & Petit, 2008 * ''Admetula bayeri'' Petit, 1976 * † ''Admetula bernayi'' (Cossmann, 1889) * ''Admetula cornidei'' (Altimira, 1978) * ''Admetula deroyae'' (Petit, 1970) * † ''Admetula dubia'' (Deshayes, 1864) * ''Admetula emarginata'' Bouchet & Petit, 2008 * ''Admetula epula'' Petit & Harasewych, 1991 * † ''Admetula evulsa'' (Solander, 1766) * † ''Admetula faksensis'' Schnetler & Petit, 2006 * ''Admetula formosa'' S.-I Huang & M.-H. Lin, 2020 * † ''Admetula funigera'' (Staadt, 1913) * ''Admetula garrardi'' Petit, 1974 * † ''Admetula girauxi'' (Cossmann, 1913) * ''Admetula gittenbergeri'' (Verhecken, 2002) n ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
