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''Elysia'' is a genus of sea slugs, marine gastropod molluscs in the family Plakobranchidae. These animals are colorful sea slugs, and they can superficially resemble nudibranchs, but are not very closely related to them. Instead they are sacoglossans, commonly known as sap-sucking slugs.〔Bouchet, P.; Gofas, S. (2010). Elysia Risso, 1818. In: Bouchet, P.; Gofas, S.; Rosenberg, G. (2010) World Marine Mollusca database. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=137928 on 2010-12-14〕 ''Elysia'' sea slugs graze on algae and some species such as ''E. viridis'' and ''E. chlorotica'' hijack the chloroplasts for themselves. The chloroplasts end up lining the slug’s digestive tract, enabling the slugs to survive solely by photosynthesis for several months at a time. This association is crucial for the development and maturing of the slug. Exactly how the slugs use the chloroplasts is unclear, as many of the proteins used are encoded in the genome of the host cell. These proteins, numbering in the hundreds, are manufactured in the cell’s nucleus, and then moved into the chloroplast, enabling it to survive.〔(BBC News item )〕 This genus was previously sometimes considered to be in the family Stiligeridae, and was also previously placed in the family Elysiiidae. ==Species== Species in the genus ''Elysia'' include:〔 * ''Elysia abei'' Baba, 1955 * ''Elysia amakusana'' Baba, 1955 * ''Elysia annedupontae'' Ortea, Caballer, Moro & Espinosa, 2005 * ''Elysia asbecki'' Wagele, Stemmer, Burghardt & Handeler, 2010〔Wagele, H., Stemmer, K., Burghardt, I., & Handeler, K. (2010). "Two new sacoglossan sea slug species (Opisthobranchia, Gastropoda): ''Ercolania annelyleorum'' sp. nov. (Limapontioidea) and ''Elysia asbecki'' sp. nov. (Plakobranchoidea), with notes on anatomy, histology and biology." ''Zootaxa'' 2676 (2010): 1-28.〕 * ''Elysia atroviridis'' Baba, 1955 * ''Elysia australis'' (Quoy & Gaimard, 1832) * ''Elysia babai'' Pruvot-Fol, 1946 * ''Elysia bangtawaensis'' Swennen, 1997 * ''Elysia bella'' (Pease, 1860) * ''Elysia bengalensis'' Swennen, 2011 * ''Elysia bennettae'' Thompson, 1973 * ''Elysia canguzua'' Er. Marcus, 1955 * ''Elysia catulus'' (Gould, 1870) * ''Elysia chilkensis'' Eliot, 1916 * ''Elysia chitwa'' Er. Marcus, 1955 * ''Elysia chlorotica'' Gould, 1870 - eastern emerald elysia, emerald elysia * ''Elysia clarki'' Pierce, Curtis, Massey, Bass, Karl & Finney, 2006 * ''Elysia coodgeensis'' (Angas, 1864) * ''Elysia cornigera'' Nuttall, 1989 * ''Elysia crispata'' Mørch, 1863 - lettuce slug * ''Elysia deborahae'' Ortea, Caballer, Moro & Espinosa, 2005 * ''Elysia degeneri'' Ostergaard, 1955 * ''Elysia diomedea'' (Bergh, 1894) * ''Elysia ellenae'' Ortea, Espinosa & Caballer, 2013 * ''Elysia eugeniae'' Ortea & Esponosa, 2002 * ''Elysia evelinae'' Marcus, 1957 * ''Elysia expansa'' (O'Donoghue, 1924) * ''Elysia filicauda'' Jensen & Wells, 1990 * ''Elysia flava'' Verrill, 1901 * ''Elysia flavipunctata'' Ichikawa, 1993 * ''Elysia flavomacula'' Jensen, 1990 * ''Elysia furvacauda'' Burn, 1958 * ''Elysia gordanae'' Thompson & Jaklin, 1988 * ''Elysia grandifolia'' Kelaart, E.F. (1858) * ''Elysia grandis'' Bergh, 1872 * ''Elysia haingsisiana'' Bergh, 1905 * ''Elysia hamatanii'' Baba, 1957 * ''Elysia hedgpethi'' Er. Marcus, 1961 * ''Elysia hendersoni'' Eliot, 1899 * ''Elysia hetta'' Perrone, 1990 * ''Elysia hirasei'' Baba, 1955 * ''Elysia japonica'' Eliot, 1913 * ''Elysia jibacoaensis'' Ortea, Moro, Caballer & Espinosa, 2011 * ''Elysia kushimotoensis'' Baba, 1957 * ''Elysia leeanneae'' Caballer, Ortea & Espinosa, 2013 * ''Elysia leucolegnote'' Jensen, 1990 * ''Elysia lobata'' Gould, 1852 * ''Elysia macnaei'' Marcus, 1982 * ''Elysia manriquei'' Ortea & Moro, 2009 * ''Elysia maoria'' Powell, 1937 * ''Elysia marcusi'' (Marcus, 1972) - synonym: ''Bosellia marcusi'' Marcus, 1972〔Händeler K., Grzymbowski Y. P., Krug P. J. & Wägele H. (2009) "Functional chloroplasts in metazoan cells - a unique evolutionary strategy in animal life". ''Frontiers in Zoology'' 6: 28. PMID 19951407.〕 * ''Elysia margaritae'' Fez, 1962 * ''Elysia mercieri'' (Pruvot-Fol, 1930) * ''Elysia minima'' Ichikawa, 1993 * ''Elysia nealae'' Ostergaard, 1955 * ''Elysia nigrocapitata'' Baba, 1957 * ''Elysia nigropunctata'' (Pease, 1871) * ''Elysia nisbeti'' Thompson, 1977 * ''Elysia obtusa'' Baba, 1938 *'' Elysia oerstedii'' Mørch, 1859 * ''Elysia orientalis'' Ortea, Moro, Caballer & Espinosa, 2011 * ''Elysia ornata'' (Swainson, 1840) - ornate elysia * ''Elysia papillosa'' A. E. Verrill, 1901 - papillose elysia * ''Elysia patagonica'' Munian & Ortea, 1997 * ''Elysia patina'' Ev. Marcus, 1980 * ''Elysia pilosa'' Risbec, 1928 * ''Elysia pratensis'' Ortea & Espinosa, 1996 * ''Elysia punctata'' Kelaart, 1857 * ''Elysia purchoni'' Thompson, 1977 * ''Elysia pusilla'' Bergh, 1872 - synonym: ''Elysiella pusilla'' * ''Elysia rufescens'' (Pease, 1871) * ''Elysia sarasuae'' Ortea, Moro, Caballer & Espinosa, 2011 * ''Elysia scops'' Ev. Marcus & Er. Marcus, 1967 * ''Elysia serca'' Er. Marcus, 1955 - Caribbean seagrass elysia, seagrass elysia * ''Elysia setoensis'' Hamatani, 1968 * ''Elysia siamensis'' Swennen, 1997 * ''Elysia singaporensis'' Swennen, 2011 * ''Elysia slimora'' Er. Marcus & Ev. Marcus, 1966 * ''Elysia stylifera'' (Jensen, 1997) * ''Elysia subornata'' A. E. Verrill, 1901 * ''Elysia sugashimae'' Baba, 1955 * ''Elysia thompsoni'' Jensen, 1993 * ''Elysia timida'' Risso, 1818 * ''Elysia tokarensis'' Baba, 1957 * ''Elysia tomentosa'' Jensen, 1997 * ''Elysia translucens'' Pruvot-Fol, 1957 * ''Elysia trilobata'' Heller & Thompson, 1983 * ''Elysia trisinuata'' Baba, 1949 * ''Elysia tuca'' Ev. Marcus and Er. Marcus, 1967 * ''Elysia verrucosa'' Jensen, 1985 * ''Elysia viridis'' (Montagu, 1804) - plant-sucking slug * ''Elysia vreelandae'' Marcus & Marcus, 1970 * ''Elysia yaeyamana'' Baba, 1936 * ''Elysia zuleicae'' Ortea & Espinosa, 2002 ;Species brought into synonymy: * ''Elysia arena'' Carlson & Hoff, 1978: synonym of ''Pattyclaya arena'' (Carlson & Hoff, 1978) * ''Elysia bedeckta'' MacFarland, 1966: synonym of ''Elysia hedgpethi'' Er. Marcus, 1961 * ''Elysia cauze scops'' Ev. Marcus & Er. Marcus, 1967: synonym of ''Elysia scops'' Ev. Marcus & Er. Marcus, 1967 * ''Elysia gracilis'' Risbec, 1928: synonym of ''Thuridilla gracilis'' (Risbec, 1928) * ''Elysia halimedae'' Macnae, 1954: synonym of ''Elysia pusilla'' (Bergh, 1871) * ''Elysia picta'' A. E. Verrill, 1901: synonym of ''Thuridilla picta'' (A. E. Verrill, 1901) * ''Elysia pruvotfolae'' Er. Marcus, 1957: synonym of ''Elysia crispata'' Mørch, 1863 * ''Elysia schrammi'' Mörch, 1863: synonym of ''Elysia crispata'' Mørch, 1863 * ''Elysia splendida'' Grube, 1861: synonym of ''Thuridilla hopei'' (Vérany, 1853) * ''Elysia thysanopoda'' Bergh, 1905: synonym of ''Thuridilla thysanopoda'' (Bergh, 1905) * ''Elysia vataae'' Risbec, 1928: synonym of ''Thuridilla vataae'' (Risbec, 1928) * ''Elysia verrilli'' Pruvot-Fol, 1946: synonym of ''Elysia crispata'' Mørch, 1863 :Taxon inquerendum: * ''Elysia fezi'' Vilella, 1968 * ''Elysia pruvotae'' Risbec, 1953 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Elysia (gastropod)」の詳細全文を読む スポンサード リンク
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