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Helicarionidae - Ryssota Ovum
Helicarionidae is a family of air-breathing land snails or semi-slugs, terrestrial pulmonate gastropod mollusks in the superfamily Helicarionoidea. Distribution The distribution of Helicarionidae includes the eastern Palearctic, Malagasy, India, south-eastern Asia, Hawaii, and Australia. Anatomy Species of snails within this family make and use love darts made of chitin. In this family, the number of haploid chromosomes lies between 21 and 30 (according to the values in this table). Taxonomy The family Helicarionidae is nested within the limacoid clade, as shown in the following cladogram :Hausdorf B. (2000). "Biogeography of the Limacoidea sensu lato (Gastropoda: Stylommatophora): Vicariance Events and Long-Distance Dispersal". ''Journal of Biogeography'' 27(2): 379-390. JSTOR Genera The following genera are recognised in the family Helicarionidae: ;Subfamily Helicarioninae *'' Amenixesta'' *'' Antiquarion'' *'' Attenborougharion'' *'' Bathia'' *'' Brevisentis'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gastropod Shell
The gastropod shell is part of the body of many gastropods, including snails, a kind of mollusc. The shell is an exoskeleton, which protects from predators, mechanical damage, and dehydration, but also serves for muscle attachment and calcium storage. Some gastropods appear shell-less (slugs) but may have a remnant within the mantle, or in some cases the shell is reduced such that the body cannot be retracted within it (semi-slug). Some snails also possess an operculum that seals the opening of the shell, known as the Aperture (mollusc), aperture, which provides further protection. The study of mollusc shells is known as conchology. The biological study of gastropods, and other molluscs in general, is malacology. Shell morphology terms vary by species group. Shell layers The gastropod shell has three major layers secreted by the Mantle (mollusc), mantle. The calcareous central layer, ostracum, is typically made of calcium carbonate (CaCO3) precipitated into an organic matrix ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chitin
Chitin (carbon, C8hydrogen, H13oxygen, O5nitrogen, N)n ( ) is a long-chain polymer of N-Acetylglucosamine, ''N''-acetylglucosamine, an amide derivative of glucose. Chitin is the second most abundant polysaccharide in nature (behind only cellulose); an estimated 1 billion tons of chitin are produced each year in the biosphere. It is a primary component of cell walls in fungi (especially filamentous and mushroom-forming fungi), the exoskeletons of arthropods such as crustaceans and insects, the radulae, cephalopod beaks and Gladius (cephalopod), gladii of molluscs and in some nematodes and diatoms. It is also synthesised by at least some fish and lissamphibians. Commercially, chitin is extracted from the shells of crabs, shrimps, shellfish and lobsters, which are major by-products of the seafood industry. The structure of chitin is comparable to cellulose, forming crystalline nanofibrils or whiskers. It is functionally comparable to the protein keratin. Chitin has proved useful ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Euconulidae
Euconulidae is a taxonomic family of minute, air-breathing land snails, terrestrial pulmonate gastropod mollusks or micromollusks in the superfamily Trochomorphoidea. This land snail family is closely allied to the Zonitidae, the glass snails. Taxonomy The family Euconulidae was originally placed within the superfamily Gastrodontoidea according to the taxonomy of the Gastropoda (Bouchet & Rocroi, 2005). Since 2017, its classification has been revised and it now belongs to the superfamily Trochomorphoidea Distribution The distribution of the Euconulidae includes the Nearctic, the western-Palearctic, the eastern-Palearctic, the Neotropical zone, the Ethiopian zone, Malagasy, south-eastern Asia, Australia, Polynesia and Hawaii. Humidity, temperature, rainfall, and foliar dripping derived from dew, mist, and rain, affect the behavior and substrate selection of small terrestrial molluscs, such as ''Tikoconus costarricanus'', which inhabit shrubs in humid tropical montane fores ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chronidae
Chronidae is a family of air-breathing land slugs, terrestrial pulmonate gastropod molluscs in the superfamily Trochomorphoidea within the superorder Eupulmonata. MolluscaBase eds. (2021). MolluscaBase. Chronidae Thiele, 1931. Accessed through: World Register of Marine Species at: http://marinespecies.org/aphia.php?p=taxdetails&id=994726 on 2021-02-22 Distribution Distribution of Chronidae include eastern-Palearctic, Ethiopian, Madagascar, India, south-eastern Asia, Australian and Polynesian eco-regions. Genera Genera within the family Chronidae include: * ''Antinous'' Robson, 1914 * '' Atrichoconcha'' Bartsch, 1942 * '' Bekkochlamys'' Habe, 1958 * '' Ceratochlamys'' Habe, 1946 * ''Chronos'' Robson, 1914 - type * of the family Chronidae * '' Danjochlamys'' Y. Azuma & M. Azuma, 1993 * '' Exrhysota'' H. B. Baker, 1941 * '' Gastrodontella'' Möllendorff, 1901 * '' Glyptobensonia'' Möllendorff, 1894 * '' Hemiglypta'' Möllendorff, 1893 * '' Hemiglyptopsis'' Thiele, 1931 * '' Hemit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pristilomatidae
Pristilomatidae is a taxonomic family of air-breathing land snails, terrestrial gastropod molluscs in the superfamily Gastrodontoidea. According to the 2005 taxonomy of the Gastropoda by Bouchet & Rocroi these snails belong to the "limacoid clade", and Vitreinae is a synonym for Pristilomatidae, although Vitreinae used to be a subfamily of Zonitidae. Family Pristilomatidae has no subfamilies (according to the taxonomy of the Gastropoda by Bouchet & Rocroi, 2005). Distribution The distribution of Pristilomatidae includes the Nearctic, the western-Palearctic and eastern Palearctic, the Neotropical, Polynesia and Hawaii. Genera Genera within the family Pristilomatidae include: * '' Coreovitrea'' Riedel, 1967 * '' Gollumia'' Riedel, 1988 * '' Gyralina'' Andreae, 1902 * '' Hawaiia'' Gude, 1911 * '' Lindbergia'' Riedel, 1959 * '' Pristiloma'' Ancey, 1887 - type genus of the family Pristilomatidae * '' Spinophallus'' Riedel, 1962 * '' Troglovitrea'' Negrea & Riedel, 1968 * '' Tau ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gastrodontoidea
Gastrodontoidea is a taxonomic superfamily of air-breathing land snails, terrestrial pulmonate gastropod mollusks in the limacoid clade. Taxonomy According to the taxonomy of the Gastropoda (Bouchet & Rocroi, 2005), families in this superfamily include: * Gastrodontidae * Chronidae * Euconulidae * Oxychilidae * Pristilomatidae * Trochomorphidae * Fossil taxa probably belonging to the Gastrodontoidea are: ** Subfamily † Archaeozonitinae Pfeffer, 1930 Pfeffer G. J. (1930). "Zur Kentniss tertiärer Landschnecken." ''Geologische und Paleontologische Abhandlungen'' new series, 17(3): 1-230., plates 1-3. page 17, page 10 and page . *** † '' Archaeozonites'' Sandberger, 1873 - type genus of Archaeozonitinae ** Subfamily † Grandipatulinae Pfeffer, 1930 *** † '' Grandipatula'' Cossmann, 1889 - type genus of Grandipatulinae ** Subfamily † Palaeoxestininae Pfeffer, 1930 *** † '' Palaeoxestina'' Wenz, 1919 - type genus of Palaeoxestininae Cladogram The following cl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dyakiidae
Dyakiidae is a family of air-breathing land snails terrestrial pulmonate gastropod mollusks in the superfamily Trochomorphoidea (according to the taxonomy of the Gastropoda by Bouchet & Rocroi, 2005). Some of the species in this family are sinistral (left-handed) in their shell coiling. Distribution The family Dyakiidae is endemic to Sundaland in Southeast Asia. Anatomy In this family, the number of haploid chromosomes is between 26 and 30 (according to the values in this table).Barker G. M. (2001) ''Gastropods on Land: Phylogeny, Diversity and Adaptive Morphology''. 1-146. In: Barker G. M. (ed.) (2001) The biology of terrestrial molluscs'. CABI Publishing, Oxon, UK, cited pages: 139-144. . The family also includes the only known terrestrial gastropods to emit light. The Digestive system characteristics are as follows. The buccal mass is small. The jaw is smooth. The stomach is very simple with weak muscles (as is the case in the majority of land snails). (These anatomica ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Staffordiidae
Staffordiidae is a family (biology), family of air-breathing land snails, terrestrial molluscs, terrestrial pulmonate gastropod mollusks in the superfamily Trochomorphoidea.MolluscaBase eds. (2021). MolluscaBase. Staffordiidae Thiele, 1931. Accessed through: World Register of Marine Species at: http://marinespecies.org/aphia.php?p=taxdetails&id=994727 on 2021-02-22 Staffordiidae is the only family in the superfamily Staffordioidea. This family has no subfamilies (according to the Taxonomy of the Gastropoda (Bouchet & Rocroi, 2005), taxonomy of the Gastropoda by Bouchet & Rocroi, 2005). Staffordiidae is a poorly understood family, because it occurs only in the Dafla Hills area of List of non-marine molluscs of India, India. The fauna and flora of that area has not been researched sufficiently. Various sources consider the family Staffordiidae as part of DyakiidaeBarker G. M. (2001) ''Gastropods on Land: Phylogeny, Diversity and Adaptive Morphology''. 1–146. In: Barker G. M. (e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Journal Of Biogeography
The ''Journal of Biogeography'' is a monthly peer-reviewed scientific journal that was established in 1974. It covers aspects of spatial, ecological, and historical biogeography. The founding editor-in-chief was David Watts, followed by John Flenley (1936–2018), Philip Stott (1987-2004), Robert J. Whittaker (2004–2015), and Peter Linder (University of Zurich; 2015–2019). As of early 2023, the editor-in-chief was Michael N Dawson (University of California, Merced). Since 2024, the journal has changed its editorial board The editorial board is a group of editors, writers, and other people who are charged with implementing a publication's approach to editorials and other opinion pieces. The editorials published normally represent the views or goals of the publicat ..., and the new senior editors are Arley Muth, Luciano Bosso, Alison Nazareno, and Diogo Provete. Abstracting and indexing The journal is abstracted and indexed in: References External links * {{DEFAULTSO ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cladogram
A cladogram (from Greek language, Greek ''clados'' "branch" and ''gramma'' "character") is a diagram used in cladistics to show relations among organisms. A cladogram is not, however, an Phylogenetic tree, evolutionary tree because it does not show how ancestors are related to descendants, nor does it show how much they have changed, so many differing evolutionary trees can be consistent with the same cladogram. A cladogram uses lines that branch off in different directions ending at a clade, a group of organisms with a last common ancestor. There are many shapes of cladograms but they all have lines that branch off from other lines. The lines can be traced back to where they branch off. These branching off points represent a hypothetical ancestor (not an actual entity) which can be inferred to exhibit the traits shared among the terminal taxa above it. This hypothetical ancestor might then provide clues about the order of evolution of various features, adaptation, and other e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
