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Achatinella Fuscobasis 63974826
''Achatinella'' is a tropical genus of colorful land snails in the monotypic Achatinellidae subfamily Achatinellinae. Species are arboreal pulmonate gastropod mollusks with some species called Oʻahu tree snails or kāhuli in the Hawaiian language. ''Achatinella'' species are all endemic to the island of Oahu in List of non-marine molluscs of Hawaii, Hawaii, and all remaining extant taxon, extant species are endangered species, endangered. They were once abundant and were mentioned extensively in Hawaiian folklore and songs, and their shells were used in Lei (Hawaii), lei and other ornaments. Many of the species are wiktionary:sinistral, sinistral or left-handed chirality in their spiral gastropod shell, shell coiling, whereas most gastropod shells are wiktionary:dextral, dextral, with a right handed spiral. Distribution There were 41 species of ''Achatinella'' endemic (ecology), endemic to the List of non-marine molluscs of Hawaii, Hawaiian island of Oʻahu, though only 13 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Achatinella Mustelina
''Achatinella mustelina'' is a species of air-breathing land snail, a terrestrial animal, terrestrial pulmonate gastropod mollusc in the family Achatinellidae. This species is Endemism, endemic to the Waianae Range of the island of Oahu, List of non-marine molluscs of Hawaii, Hawaii. All 13 subspecies of ''Achatinella mustelina'' were synonymized with the species by Holland & Hadfield (2007), because they are not monophyletic. Habitat ''Achatinella mustelina'' can be found in elevated forests that are dry, wet, or mesic. ''Achatinella mustelina'' attaches itself to leaves at the tops of native trees and shrubs such as ''Metrosideros polymorpha'', ''Dubautia plantaginea, Dubautia plantanginea'', ''Myrsine lessertiana'', ''Antidesma platyphyllum'' and ''Nestegis sandwicensis.'' Some individuals may live on a single tree for their entire lifetime. The range of temperature ''Achatinella mustelina'' typical live in is 20 degrees Celsius during the day and 16 degrees Celsius at nig ... [...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 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 Gastrop ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dextral
Sinistral and dextral, in some scientific fields, are the two types of chirality ("handedness") or relative direction. The terms are derived from the Latin words for "left" (''sinister'') and "right" (''dexter''). Other disciplines use different terms (such as dextro- and laevo-rotary in chemistry, or clockwise and anticlockwise in physics) or simply use left and right (as in anatomy). Relative direction and chirality are distinct concepts. Relative direction is from the point of view of the observer; a completely symmetric object has a left side and a right side, from the observer's point of view, if the top and bottom and direction of observation are defined. Chirality, however, is observer-independent: no matter how one looks at a right-hand screw thread, it remains different from a left-hand screw thread. Therefore, a symmetric object has sinistral and dextral directions arbitrarily defined by the position of the observer, while an asymmetric object that shows chirality may ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
