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Acavus
''Acavus'' is a genus of air-breathing land snails, terrestrial pulmonate gastropod mollusks in the family Acavidae. They belongs to group of tree snails that inhabited the ancient continent of Gondwana over 150 million years ago. These beautiful tree snails are endemic to Sri Lanka. It is present a large intraspecific polymorphism, with the development of various geographical subspecies (among them ''Acavus phoenix phoenix'' and ''Acavus phoenix castaneus''). Species * ''Acavus haemastoma'' (Linnaeus, 1758) * ''Acavus phoenix'' Pfeiffer, 1854 * ''Acavus superbus ''Acavus superbus'' is a species of air-breathing land snails, terrestrial pulmonate gastropod mollusks in the family Acavidae. Three subspecies recognized. Description ''Acavus superbus'' has green colored shell and rose brown body. Distribu ...'' Pfeiffer, 1850 References * B. Hausdorfi and Kalika K. Pereira REVISION OF THE GENUS ACAVUS FROM SRI LANKA (GASTROPODA: ACAVIDAE) [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acavus Haemastoma
''Acavus haemastoma'' is a species of air-breathing land snail, terrestrial pulmonate gastropod mollusks in the family Acavidae. Three subspecies recognized. Description ''Acavus haemastoma'' has a shell reaching a width of 38–46 mm. These land snails descend to the ground only at night. They feed on rotting fruits. Its shell is rose to dark brown in color, which sometimes white or dark lateral lines can be seen. Body is brown colored. The species is known to feed on soft tissues of many garden plant fruits, and mosses, lichens as well. Distribution This species is endemic to Sri Lanka Sri Lanka (, ; si, ශ්රී ලංකා, Śrī Laṅkā, translit-std=ISO (); ta, இலங்கை, Ilaṅkai, translit-std=ISO ()), formerly known as Ceylon and officially the Democratic Socialist Republic of Sri Lanka, is an .... It is present in island's rainforest. Subspecies *''Acavus haemastoma fastuosa'' *''Acavus haemastoma haemastoma'' *''Acavus haemasto ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acavus Superbus
''Acavus superbus'' is a species of air-breathing land snails, terrestrial pulmonate gastropod mollusks in the family Acavidae. Three subspecies recognized. Description ''Acavus superbus'' has green colored shell and rose brown body. Distribution This species is endemic Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found elsew ... to Sri Lanka. It is confined to wet zone of the country. Subspecies *''Acavus superbus grevillei'' *''Acavus superbus roseolabiatus'' *''Acavus superbus superbus'' References External linksPopulation Size, Plant Occupancy and Threats to Acavus Acavidae Gastropods described in 1854 {{Acavidae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acavus Phoenix
''Acavus phoenix'', the giant land snail, is a species of air-breathing land snails, terrestrial pulmonate gastropod mollusks in the family Acavidae. Taxonomy There are two subspecies recognized: *''Acavus phoenix phoenix'' *''Acavus phoenix castaneus'' Description ''Acavus phoenix'' is the most common ''Acavus'' species on the island. Shell about 60mm in diameter and is rose colored and body black colored. Distribution and habitat This species is endemic Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found elsew ... to Sri Lanka. It is confined to wet zone of the country. References External linksPopulation Size, Plant Occupancy and Threats to Acavus Acavidae Gastropods described in 1854 {{Acavidae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acavidae
Acavidae is a taxonomic family of air-breathing land snails, terrestrial pulmonate gastropod molluscs in the superfamily Acavoidea (according to the taxonomy of the Gastropoda by Bouchet & Rocroi, 2005). Anatomy In this family, the number of haploid chromosomes lies between 26 and 35 (according to the values in this table).Barker G. M.: Gastropods on Land: ''Phylogeny, Diversity and Adaptive Morphology''. in Barker G. M. (ed.): The biology of terrestrial molluscs'. CABI Publishing, Oxon, UK, 2001, . 1-146, cited pages: 139 and 142. Genera The family Acavidae has no subfamilies. Genera in the family Acavidae include:http://species.wikimedia.org/wiki/Acavidae cited 11 October 2008 * ''Acavus'' Montfort, 1810 * ''Ampelita'' Beck, 1837 * '' Embertoniphanta'' Groh & Poppe, 2002 * '' Eurystyla'' Ancey, 1887 * '' Helicophanta'' Férussac, 1821 * '' Leucotaenius'' Martens, 1860 * '' Oligospira'' Ancey, 1887 * † ''Pebasiconcha'' Wesselingh & Gittenberger, 1999 - with the only spec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sri Lanka
Sri Lanka (, ; si, ශ්රී ලංකා, Śrī Laṅkā, translit-std=ISO (); ta, இலங்கை, Ilaṅkai, translit-std=ISO ()), formerly known as Ceylon and officially the Democratic Socialist Republic of Sri Lanka, is an island country in South Asia. It lies in the Indian Ocean, southwest of the Bay of Bengal, and southeast of the Arabian Sea; it is separated from the Indian subcontinent by the Gulf of Mannar and the Palk Strait. Sri Lanka shares a maritime border with India and Maldives. Sri Jayawardenepura Kotte is its legislative capital, and Colombo is its largest city and financial centre. Sri Lanka has a population of around 22 million (2020) and is a multinational state, home to diverse cultures, languages, and ethnicities. The Sinhalese are the majority of the nation's population. The Tamils, who are a large minority group, have also played an influential role in the island's history. Other long established groups include the Moors, the Burghers ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Land Snail
A land snail is any of the numerous species of snail that live on land, as opposed to the sea snails and freshwater snails. ''Land snail'' is the common name for terrestrial gastropod mollusks that have shells (those without shells are known as slugs). However, it is not always easy to say which species are terrestrial, because some are more or less amphibious between land and fresh water, and others are relatively amphibious between land and salt water. Land snails are a polyphyletic group comprising at least ten independent evolutionary transitions to terrestrial life (the last common ancestor of all gastropods was marine). The majority of land snails are pulmonates that have a lung and breathe air. Most of the non-pulmonate land snails belong to lineages in the Caenogastropoda, and tend to have a gill and an operculum. The largest clade of land snails is the Cyclophoroidea, with more than 7,000 species. Many of these operculate land snails live in habitats or microhabitats ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Terrestrial Molluscs
Terrestrial molluscs or land molluscs (mollusks) are an ecological group that includes all molluscs that live on land in contrast to freshwater and marine molluscs. They probably first occurred in the Carboniferous, arising from freshwater ones. Characteristics This group includes land snails and land slugs. Loss of the shell has taken place many times in different groups that are not evolutionarily closely related, and land snails and slugs are most often treated together as a single group in specialized malacological literature.Barker G. M. (ed.) The biology of terrestrial molluscs'. CABI Publishing, 2001, 558 pp. .Barker G. M. (ed.) Natural enemies of terrestrial molluscs'. CABI Publishing, 2004, 644 pp. . All terrestrial molluscs belong to the class Gastropoda. However, colonization of the land took place several times during the evolutionary past, and as a result terrestrial molluscs are classified in several different, often not closely related, gastropod taxa. Terrestr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pulmonate
Pulmonata or pulmonates, is an informal group (previously an order, and before that a subclass) of snails and slugs characterized by the ability to breathe air, by virtue of having a pallial lung instead of a gill, or gills. The group includes many land and freshwater families, and several marine families. The taxon Pulmonata as traditionally defined was found to be polyphyletic in a molecular study per Jörger ''et al.'', dating from 2010. Pulmonata are known from the Carboniferous Period to the present. Pulmonates have a single atrium and kidney, and a concentrated, symmetrical, nervous system. The mantle cavity is located on the right side of the body, and lacks gills, instead being converted into a vascularised lung. Most species have a shell, but no operculum, although the group does also include several shell-less slugs. Pulmonates are hermaphroditic, and some groups possess love darts. Linnean taxonomy The taxonomy of this group according to the taxonomy of the Ga ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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. There are many thousands of species of sea snails and slugs, as well as freshwater snails, freshwater limpets, and land snails and slugs. The class Gastropoda 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 Late Cambrian. , 721 families of gastropods are known, of which 245 are extinct and appear only in the fossil record, while 476 are currently extant with or without a fossil record. Gastropoda (previously known as univalves and sometimes spelled "Gasteropoda") are a major part of the phylum Mollusca, and are the most highly diversified class in the phylum, with 65,000 to 80,000 living snail and slug species. The anatomy, behavior, feeding, and re ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mollusk
Mollusca is the second-largest phylum of invertebrate animals after the Arthropoda, the members of which are known as molluscs or mollusks (). Around 85,000 extant species of molluscs are recognized. The number of fossil species is estimated between 60,000 and 100,000 additional species. 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. Numerous molluscs also live in freshwater and terrestrial habitats. They are highly diverse, not just in size and anatomical structure, but also in behaviour and habitat. 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 invertebrate species. The gas ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Endemic (ecology)
Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found elsewhere. For example, the Cape sugarbird is found exclusively in southwestern South Africa and is therefore said to be ''endemic'' to that particular part of the world. An endemic species can be also be referred to as an ''endemism'' or in scientific literature as an ''endemite''. For example '' Cytisus aeolicus'' is an endemite of the Italian flora. '' Adzharia renschi'' was once believed to be an endemite of the Caucasus, but it was later discovered to be a non-indigenous species from South America belonging to a different genus. The extreme opposite of an endemic species is one with a cosmopolitan distribution, having a global or widespread range. A rare alternative term for a species that is endemic is "precinctive", which applies to s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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