Information:  - Sea snail is a common name for snails that normally live in saltwater, in other words marine gastropods. The taxonomic class Gastropoda also includes snails that live in other habitats, such as land snails and freshwater snails. Many species of sea snails are edible and exploited as food sources by humans.  - Desmopteridae is a family of pelagic sea snails or `` sea butterflies '' , marine gastropod mollusks in the superfamily Cymbulioidea . This family has no subfamilies ( according to the taxonomy of the Gastropoda by Bouchet & Rocroi , 2005 ) . Desmopterus Chun , 1889 is the type genus of the family Desmopteridae . The species are protandric hermaphrodites . There is no shell , no protoconch and no longer any supporting tissue . The body consists almost completely of the two big parapodia ( winglike flaps ) .  - Cymbulioidea is a taxonomic superfamily of pelagic "sea butterflies", one group of swimming sea snails. They are holoplanktonic opisthobranch gastropod molluscs in the clade Thecosomata.    'desmopteridae' is related to which object entity through the relation of 'parent taxon'?  Choices: - cymbulioidea  - gastropoda  - thecosomata
thecosomata
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Information:  - A stratovolcano, also known as a composite volcano, is a conical volcano built up by many layers (strata) of hardened lava, tephra, pumice, and volcanic ash. Unlike shield volcanoes, stratovolcanoes are characterized by a steep profile and periodic explosive eruptions and effusive eruptions, although some have collapsed craters called calderas. The lava flowing from stratovolcanoes typically cools and hardens before spreading far due to high viscosity. The magma forming this lava is often felsic, having high-to-intermediate levels of silica (as in rhyolite, dacite, or andesite), with lesser amounts of less-viscous mafic magma. Extensive felsic lava flows are uncommon, but have travelled as far as .  - Pogranichny ( Russian :  ) is a shield volcano in central Kamchatka . It is the highest and the easternmost among three shield volcanoes located north - east of Cherny volcano in the central Sredinny Range .  - Sredinny Range is a mountain range in Kamchatka, Russia, at . It stretches from northeast to southwest along the center of the peninsula and is made up of volcanoes, mostly shield volcanoes and stratovolcanoes. The highest peak of the range is Ichinsky, a stratovolcano some ) high. The Sredinny Range is separated from the north-south running coastal (Vostochny) range to the east, by the Central Kamchatka Depression.  - A volcano is a rupture in the crust of a planetary-mass object, such as Earth, that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface.  - Lava is the molten rock expelled by a volcano during an eruption. The resulting rock after solidification and cooling is also called "lava". The molten rock is formed in the interior of some planets, including Earth, and some of their satellites. The source of the heat that melts the rock within the earth is geothermal energy. When first erupted from a volcanic vent, lava is a liquid usually at temperatures from .   - Ichinsky (or  , "Ichinskaya sopka") is a large stratovolcano located in the central part of Kamchatka Peninsula, Russia. At , it is the highest peak of the Sredinny Range, the central range of the peninsula. Ichinsky is also among the largest volcanoes in Kamchatka, with a volume of about .  - The viscosity of a fluid is a measure of its resistance to gradual deformation by shear stress or tensile stress. For liquids, it corresponds to the informal concept of "thickness"; for example, honey has a much higher viscosity than water.  - Mafic is an adjective describing a silicate mineral or igneous rock that is rich in magnesium and iron, and is thus a portmanteau of magnesium and ferric. Most mafic minerals are dark in color, and common rock-forming mafic minerals include olivine, pyroxene, amphibole, and biotite. Common mafic rocks include basalt, dolerite and gabbro. Mafic rocks often also contain calcium-rich varieties of plagioclase feldspar.   - A shield volcano is a type of volcano usually built almost entirely of fluid lava flows. They are named for their low profile, resembling a warrior's shield lying on the ground. This is caused by the highly fluid lava they erupt, which travels farther than lava erupted from stratovolcanoes. This results in the steady accumulation of broad sheets of lava, building up the shield volcano's distinctive form. The shape of shield volcanoes is due to the low viscosity of their mafic lava.    'pogranichny volcano' is related to which object entity through the relation of 'instance of'?  Choices: - adjective  - building  - color  - concept  - deformation  - fluid  - geothermal energy  - liquid  - mineral  - mountain  - object  - part  - peninsula  - range  - rock  - running  - shape  - shield volcano  - stratovolcano  - volcano  - water
mountain
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