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Helicinidae
Helicinidae is a family of small tropical land snails, terrestrial operculate gastropod mollusks in the superfamily Helicinoidea. Name These snails are not at all closely related to the air-breathing land snails, despite a superficial similarity of the shells. The name "Helicinidae" immediately reminds most people of "Helicidae", the most well-known group of land snails including e.g. ''Helix pomatia'', but the important two letters "ni" only from the Latin diminutive of the latter name alluding to superficial similarities of otherwise completely different things. Distribution These snails are found in tropical and subtropical areas but they have an odd distribution: they are restricted to the Caribbean islands and some Indo-Pacific and Pacific islands, as well as the edge of the Asian and Australian continents. Some species are found in the southern United States, from Louisiana to Florida; others in Central and South America. Taxonomy Helicinidae belongs to superfamily ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alcadia
''Alcadia'' is a genus of tropical and subtropical land snails with an Operculum (gastropod), operculum, terrestrial animal, terrestrial gastropod mollusks in the subfamily Helicininae of the family Helicinidae. MolluscaBase eds. (2024). MolluscaBase. Alcadia J. E. Gray, 1840. Accessed through: World Register of Marine * At: https://www.marinespecies.org/aphia.php?p=taxdetails&id=996448 on 2024-07-24 Description ''Alcadia'' differs from the Helicininae in having a slit in front of the Aperture (mollusc), aperture, into which is fitted the tooth-like process of the Operculum (gastropod), operculum. Species Species within the genus ''Alcadia'' include: * ''Alcadia affinis'' C.B. Adams, 1846 * ''Alcadia alta'' (G. B. Sowerby II, 1866) * ''Alcadia aurantia'' (J. E. Gray, 1824) * ''Alcadia bahamensis'' (L. Pfeiffer, 1862) * ''Alcadia bermudezi'' Aguayo & Jaume, 1957 [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Helicina Rhodostoma
''Helicina rhodostoma'' is a species of tropical land snail with an operculum, a terrestrial gastropod mollusc in the family Helicinidae. Shell description Robert John Lechmere Guppy (1868) Guppy R. J. L. (1868). "On the terrestrial mollusks of Dominica and Grenada, with an account of some new species from Trinidad". ''Annals and Magazine of Natural History'' (4)1429442. noted that this species is not found above 1000 m altitude. Three names have been used for this species, but material by Robinson et al. (2009) shows that the forms intergrade, illustrating the variability of the species. In general, populations from higher altitudes have a more pronounced columellar spine, and are more likely to have a red to reddish-orange aperture, as seen in typical ''Helicina rhodostoma''. Populations from drier, coastal areas tend to lack a columellar spine, and the aperture may be white or yellow. Juvenile specimens of this species often have a hairy periostracum, which is gradually worn o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vianinae
Vianinae is a subfamily of tropical land snail, a terrestrial animal, terrestrial gastropod mollusk in the family Helicinidae. Species According to the World Register of Marine Species, the following genera are accepted within ''Vianinae'': * ''Calidviana'' H. B. Baker, 1954 * ''Calybium (gastropod), Calybium'' Morlet, 1892 * ''Eutrochatella'' P. Fischer, 1885 * ''Geophorus'' P. Fischer, 1885 * ''Geotrochatella'' P. Fischer, 1891 * ''Heudeia'' Crosse, 1885 * ''Lucidella'' Swainson, 1840 * ''Priotrochatella'' H. Fischer, 1893 * ''Pseudotrochatella'' G. Nevill, 1881 * ''Pyrgodomus'' Crosse &P. Fischer, 1894 * ''Semitrochatella'' Aguayo & Jaume, 1958 * ''Swiftella'' H. B. Baker, 1941 * ''Troschelviana'' H. B. Baker, 1922 * ''Ustronia'' A. J. Wagner, 1908 * ''Viana (gastropod), Viana'' H. Adams & A. Adams, 1856 References * Bouchet P., Rocroi J.P., Hausdorf B., Kaim A., Kano Y., Nützel A., Parkhaev P., Schrödl M. & Strong E.E. (2017). Revised classification, nomenclato ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geophorus Romblonensis
''Geophorus'' is a genus of tropical and subtropical land snails with an operculum, terrestrial gastropod mollusks in the family Helicinidae. Species Species within the genus ''Geophorus'' include: * ''Geophorus acutissima'' * ''Geophorus agglutinans'' * ''Geophorus lazarus'' * '' Geophorus oxytropis'' * '' Geophorus romblonensis'' * ''Geophorus tagbilleranus ''Geophorus'' is a genus of tropical and subtropical land snails with an operculum, terrestrial gastropod mollusks in the family Helicinidae Helicinidae is a family of small tropical land snails, terrestrial operculate gastropod mollusks in ...'' * '' Geophorus trochaceus'' References ITIS infoDiscoverlife.org info Helicinidae {{Helicinidae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alcadia Conuloides
''Alcadia conuloides'' is a species of tropical land snail with an operculum, a terrestrial gastropod mollusk in the family Helicinidae. Taxonomy Robert John Lechmere Guppy (1895) considered this species synonymous with the taxon '' Schrammia schrammia'' (Crosse, 1872) from Guadeloupe, but that species is larger and higher-spired, and therefore Guppy's name was resurrected. Horace Burrington Baker (1927) suggested that Guppy's species probably belongs in the genus ''Alcadia'', subgenus ''Idesa''. Until the status of '' Schrammia'' and its two species can be resolved, we follow the last published work, that of Baker (1927). Distribution This species is endemic to the West Indian island of Dominica. Ecology This small species lives on wet leaves, being particularly active after rainfall, and on damp leaf litter Plant litter (also leaf litter, tree litter, soil litter, litterfall, or duff) is dead plant material (such as leaves, bark, needles, twigs, and cladodes) that ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bourciera
''Bourciera'' is a genus of neotropical terrestrial gastropod mollusks or land snails in the family Helicinidae. All species in the genus have an operculum. In 1907, an attempt was made to rename the genus ''Pseudhelicina'', sometimes corrected to ''Pseudohelicina,'' on the basis of the fact that ''Bourciera'' was also the name of a genus of birds, but according to MolluscaBase this replacement was unnecessary and ''Bourciera'' is still used. H. Burrington Baker considered ''Bourciera'' among the most primitive of terrestrial mollusks. Distribution The genus was initially described from Ecuador based on specimens collected by Jules Bourcier, after whom it was named. It is also known to occur in Peru. Species Species within the genus ''Bourciera'' include: * ''Bourciera fraseri'' Pfeiffer 1859 * ''Bourciera helicinaeformis ''Bourciera'' is a genus of neotropical terrestrial gastropod mollusks or land snails in the family Helicinidae. All species in the genus have an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Helicinoidea
Helicinoidea is a taxonomic superfamily of land snails that have an operculum. In other words, they are terrestrial operculate gastropod mollusks. They are in the order Cycloneritida and are quite closely related to the marine and freshwater nerites. Taxonomy The following families are within according to the taxonomy by Bouchet & Rocroi (2005): * family Helicinidae * † family Dawsonellidae * † family Deianiridae * family Neritiliidae * family Proserpinellidae * family Proserpinidae Proserpinidae is a Taxonomy (biology), taxonomic family (biology), family of small land snails with an operculum (gastropod), operculum, gastropod mollusks in the superfamily Helicinoidea (according to the Taxonomy of the Gastropoda (Bouchet & Ro ... References Gastropod superfamilies {{Neritimorpha-stub ... [...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] |
Otto Schindewolf
Otto Heinrich Schindewolf (7 June 1896 – 10 June 1971) was a German paleontologist who studied the evolution of corals and cephalopods. Biography Schindewolf was on the faculty at the University of Marburg from 1919 until 1927. Then he became director of the Geological Survey of Berlin. In 1948 he became a professor at the University of Tübingen, where he retired as professor emeritus in 1964. He was a saltationist who opposed the theory of gradual evolution, and in the 1930s suggested that major evolutionary transformations must have occurred in large leaps between species. This idea became known as the Hopeful Monster theory and was further taken and developed up by the geneticist Richard Goldschmidt in the 1940s. Schindewolf was also the first to suggest, in 1950, that mass extinctions might have been caused by extraterrestrial impacts or nearby supernova. From 1948 until his retirement in 1964, Schindewolf was professor of Geology and Paleontology at the Universit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wilhelm August Wenz
Wilhelm August Wenz (21 October 1886 – 12 September 1945) was a German malacologist, born in Frankfurt am Main. He is the author of the 7-part Gastropoda section of ''Handbuch der Paläozoologie'' (1938-1944), a very important review that described all known fossil genera. Only a few copies of this rare work survive: almost the entire stock of later editions was destroyed during the Second World War. Bibliography (incomplete) * Fischer K. & Wenz W. A. (1914''Die Landschneckenkalke des Mainzer Beckens und ihre Fauna'' * Wenz W. (1923-1930) "Gastropoda extramarina tertiaria" ''Fossilium catalogus, I: Animalia''. 3387 pp., published in parts. * Wenz W. (1938-1944) ''Teil 1: Allgemeiner Teil und Prosobranchia Prosobranchia was a large Taxonomy (biology), taxonomic Class (biology), subclass of sea snails, land snails and freshwater snails. This taxon of gastropods dates back to the 1920s. It has however been proven to be polyphyly, polyphyletic (consis ...''. In: Schindewol ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
