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Partula Thetis
PARTULA THETIS is a species of air-breathing tropical land snail , a terrestrial pulmonate gastropod mollusk in the family Partulidae . This species is endemic to Palau
Palau
. REFERENCES * ^ O'Foighil, D. & Rundell, R.J. (2012). "Partula thetis". IUCN Red List of Threatened Species. Version 2013.2. International Union for Conservation of Nature . Retrieved 26 February 2014. This Partulidae -related article is a stub . You can help by expanding it . * v * t * e This article about Palau
Palau
is a stub . You can help by expanding it
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Land Snail
A LAND SNAIL is any of the numerous species of snail that live on land, as opposed to 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 freshwater, and others are relatively amphibious between land and saltwater. The majority of land snails are pulmonates . That is, they have a lung and breathe air. A minority however belong to much more ancient lineages where their anatomy includes a gill and an operculum . Many of these operculate land snails live in habitats or microhabitats that are sometimes (or often) damp or wet, such as for example in moss . Land snails have a strong muscular foot; they use mucus to enable them to crawl over rough surfaces, and in order to keep their soft bodies from drying out
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Terrestrial Animal
TERRESTRIAL ANIMALS are animals that live predominantly or entirely on land (e.g., cats , ants , snails ), as compared with aquatic animals , which live predominantly or entirely in the water (e.g., fish , lobsters , octopuses ), or amphibians , which rely on a combination of aquatic and terrestrial habitats (e.g., frogs , or newts ). Terrestrial invertebrates include ants , flies , crickets, grasshoppers and snails
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Tropical
The TROPICS are a region of the Earth
Earth
surrounding the Equator
Equator
. They are delimited in latitude by the Tropic of Cancer in the Northern Hemisphere at 23°26′13.0″ (or 23.43694°) N and the Tropic of Capricorn in the Southern Hemisphere
Southern Hemisphere
at 23°26′13.0″ (or 23.43694°) S; these latitudes correspond to the axial tilt of the Earth. The tropics are also referred to as the TROPICAL ZONE and the TORRID ZONE (see geographical zone ). The tropics include all the areas on the Earth
Earth
where the Sun
Sun
contacts the zenith , a point directly overhead, at least once during the solar year (which is a subsolar point ). The tropics are distinguished from the other climatic and biomatic regions of Earth, which are the middle latitudes and the polar regions on either side of the equatorial zone
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Species
In biology , a SPECIES is the basic unit of classification and a taxonomic rank , as well as a unit of biodiversity , but it has proven difficult to find a satisfactory definition. Scientists and conservationists need a species definition which allows them to work, regardless of the theoretical difficulties. If as Linnaeus
Linnaeus
thought, species were fixed, there would be no problem, but evolutionary processes cause species to change continually, and to grade into one another. A species is often defined as the largest group of organisms in which two individuals can produce fertile offspring , typically by sexual reproduction . While this definition is often adequate, when looked at more closely it is problematic . For example, with hybridisation , in a species complex of hundreds of similar microspecies , or in a ring species , the boundaries between closely related species become unclear
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Binomial Nomenclature
BINOMIAL NOMENCLATURE, also called BINOMINAL NOMENCLATURE or BINARY NOMENCLATURE, is a formal system of naming species of living things by giving each a name composed of two parts, both of which use Latin grammatical forms , although they can be based on words from other languages. Such a name is called a BINOMIAL NAME (which may be shortened to just "binomial"), a BINOMEN, BINOMINAL NAME or a SCIENTIFIC NAME; more informally it is also called a LATIN NAME. The first part of the name identifies the genus to which the species belongs; the second part – the SPECIFIC NAME or SPECIFIC EPITHET – identifies the species within the genus. For example, humans belong to the genus Homo
Homo
and within this genus to the species Homo
Homo
sapiens . Tyrannosaurus
Tyrannosaurus
rex is probably the most widely known binomial
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Carl Semper
CARL GOTTFRIED SEMPER (July 6, 1832, Altona, Hamburg – May 29, 1893, Würzburg ) was a German ethnologist and animal ecologist. He attended the Hanover Polytechnic from 1851-1854 and achieved a Ph.D. in zoology from the University of Würzburg in 1856. He traveled to the Philippines and Palau two years later, staying in the region until 1865 in association with Museum Godeffroy . Semper published several works detailing his observations and experiences among Pacific peoples. In addition to his written work, he delivered lectures at the Lowell Technological Institute (now merged into the University of Massachusetts Lowell ) near Boston and maintained a large collection of animal specimens. His work in Palau is especially noted as comprising one of the very few reliable accounts of cultural practices that are today severely diminished by Westernization . Semper is also praised for his humane and even-handed attitude toward indigenous cultures
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Pulmonate
informal group PULMONATA Cuvier , 1814 TAXONOMIC SUBDIVISIONS * informal group Basommatophora
Basommatophora
* clade Eupulmonata 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
Pulmonata
as traditionally defined was found to be polyphyletic in a molecular study per Jörger et al., dating from 2010. Pulmonata
Pulmonata
are known from the Carboniferous
Carboniferous
Period to the present. Pulmonates have a single atrium and kidney, and a concentrated, symmetrical, nervous system
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Gastropod
See text . DIVERSITY 65,000 to 80,000 species The GASTROPODA or GASTROPODS, more commonly known as SNAILS AND SLUGS , are a large taxonomic class within the phylum Mollusca . The class Gastropoda includes snails and slugs of all kinds and all sizes from microscopic to large. There are many thousands of species of sea snails and sea slugs , as well as freshwater snails , freshwater limpets , land snails and land 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 . There are 611 families of gastropods known, of which 202 are extinct and appear only in the fossil record
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International Union For Conservation Of Nature
The INTERNATIONAL UNION FOR CONSERVATION OF NATURE (IUCN), officially INTERNATIONAL UNION FOR CONSERVATION OF NATURE AND NATURAL RESOURCES is an international organization working in the field of nature conservation and sustainable use of natural resources . It is involved in data gathering and analysis, research, field projects, advocacy, and education. IUCN's mission is to "influence, encourage and assist societies throughout the world to conserve nature and to ensure that any use of natural resources is equitable and ecologically sustainable." Over the past decades, IUCN has widened its focus beyond conservation ecology and now incorporates issues related to sustainable development in its projects. Unlike many other international environmental organisations, IUCN does not itself aim to mobilize the public in support of nature conservation
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Special
SPECIAL or SPECIALS may refer to: CONTENTS * 1 Music * 2 Film and television * 3 Other uses * 4 See also MUSIC * Special (album) , a 1992 album by Vesta Williams * "Special" (Garbage song) , 1998 * "Special" (Mew song) , 2005 * "Special" (Stephen Lynch song) , 2000 * The Specials
The Specials
, a British band * "Special", a song by Violent Femmes on The Blind Leading the Naked * "Special", a song on
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Palau
Coordinates : 7°30′N 134°30′E / 7.500°N 134.500°E / 7.500; 134.500 Republic
Republic
of Palau Beluu er a Belau (Palauan ) Flag Seal ANTHEM: Belau rekid Our Palau STATUS Sovereign state
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Endemism
ENDEMISM is the ecological state of a species being unique to a defined geographic location, such as an island, nation, country or other defined zone, or habitat type; organisms that are indigenous to a place are not endemic to it if they are also found elsewhere. The extreme opposite of endemism is cosmopolitan distribution . An alternative term for a species that is endemic is PRECINCTIVE, which applies to species (and subspecific categories) that are restricted to a defined geographical area. CONTENTS * 1 Etymology * 2 Overview * 3 Threats to highly endemistic regions * 4 Notes * 5 References * 6 Further reading * 7 External links ETYMOLOGYThe word endemic is from New Latin
New Latin
endēmicus, from Greek ενδήμος, endēmos, "native". Endēmos is formed of en meaning "in", and dēmos meaning "the people". The term "precinctive" has been suggested by some scientists, and was first used in botany by MacCaughey in 1917
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Mollusk
See text . DIVERSITY 85,000 recognized living species. Cornu aspersum (formerly Helix aspersa) – a common land snail The MOLLUSC (or MOLLUSK /ˈmɒləsk/ ) composes the large phylum MOLLUSCA of invertebrate animals. Around 85,000 extant species of molluscs are recognized. 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 in anatomical structure, but also in behaviour and in habitat. The phylum is typically divided into 9 or 10 taxonomic classes , of which two are entirely extinct
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Family (biology)
In biological classification , FAMILY (Latin : familia, plural familiae) is one of the eight major taxonomic ranks ; it is classified between order and genus . A family may be divided into subfamilies , which are intermediate ranks above the rank of genus . In vernacular usage , a family may be named after one of its common members; for example, walnuts and hickory trees belong to the family Juglandaceae , commonly known as the walnut family. What does or does not belong to a family—or whether a described family should be recognized at all—are proposed and determined by practicing taxonomists. There are no hard rules for describing or recognizing a family, or any taxa. Taxonomists often take different positions about descriptions of taxa, and there may be no broad consensus across the scientific community for some time
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Conservation Status
The CONSERVATION STATUS of a group of organisms (for instance, a species ) indicates whether the group still exists and how likely the group is to become extinct in the near future. Many factors are taken into account when assessing conservation status: not simply the number of individuals remaining, but the overall increase or decrease in the population over time, breeding success rates, and known threats. Various systems of conservation status exist and are in use at international, multi-country, national and local levels as well as for consumer use
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