海天牛屬

海天牛屬（Elysia）是海天牛科下的一個屬，其下物種與裸鰓亞目生物外形相似，但並沒有太多的親緣關係。海天牛屬下的許多生物都有盜食體質，可吸收藻類的葉綠體化為己用，時效長達數月之久。不過至今其具體機制還不清楚。 海天牛屬下的種包括 Elysia abei Baba, 1955 Elysia amakusana Baba, 1955 Elysia annedupontae Ortea, Caballer, Moro & Espinosa, 2005 Elysia asbecki Wagele, Stemmer, Burghardt & Handeler, 2010 Elysia atroviridis Baba, 1955 Elysia australis Quoy & Gaimard, 1832 Elysia babai Pruvot-Fol, 1946 Elysia bangtawaensis Swennen, 1997 Elysia bella Pease, 1860 Elysia bennettae Thompson, 1973 Elysia canguzua Er. Marcus, 1955 Elysia catulus Gould, 1870 长角海天牛 Elysia chilkensis Eliot, 1916 Elysia chitwa Er. Marcus, 1955 綠葉海天牛 Elysia chlorotica Gould, 1870 Elysia clarki Pierce, Curtis, Massey, Bass, Karl & Finney, 2006 Elysia coodgeensis (Angas, 1864) Elysia cornigera Nuttall, 1989 Elysia crispata Mørch, 1863（图片 （页面存档备份，存于互联网档案馆）） Elysia deborahae Ortea, Caballer, Moro & Espinosa, 2005 Elysia degeneri Ostergaard, 1955 Elysia diomedea (Bergh, 1894) Elysia eugeniae Ortea & Esponosa, 2002 Elysia evelinae Marcus, 1957 Elysia expansa (O'Donoghue, 1924) Elysia fezi Vilella, 1968 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 halimedae Macnae, 1954 Elysia hamatanii Baba, 1957 Elysia hedgpethi Er. Marcus, 1961 Elysia hendersoni Eliot, 1899 Elysia hetta Perrone, 1990 Elysia hirasei Baba, 1955 日本海天牛 Elysia japonica Eliot, 1913 Elysia kushimotoensis Baba, 1957 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 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 華麗海天牛 Elysia ornata Swainson, 1840 Elysia papillosa A. E. Verrill, 1901 Elysia patagonica Munian & Ortea, 1997 Elysia patina Ev. Marcus, 1980 Elysia picta A. E. Verrill, 1901 Elysia pilosa Risbec, 1928 Elysia pratensis Ortea & Espinosa, 1996 Elysia punctata Kelaart, 1857 Elysia purchoni Thompson, 1977 Elysia pusilla Bergh, 1872 Elysia rufescens Pease, 1871 Elysia scops Ev. Marcus & Er. Marcus, 1967 Elysia serca Er. Marcus, 1955 Elysia setoensis Hamatani, 1968 Elysia siamensis Swennen, 1997 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 Elysia vreelandae Marcus & Marcus, 1970 Elysia yaeyamana Baba, 1936 Elysia zuleicae Ortea & Espinosa, 2002 被劃分到其他屬的生物： Elysia arena Carlson & Hoff, 1978：Pattyclaya arena的異名 Carlson & Hoff, 1978 Elysia gracilis Risbec, 1928：Thuridilla gracilis的異名 Risbec, 1928 Elysia picta A. E. Verrill, 1901：Thuridilla picta的異名 A. E. Verrill, 1901 Elysia splendida Grube, 1861：Thuridilla hopei的異名 Vérany, 1853 Elysia vataae Risbec, 1928：Thuridilla vataae的異名 Risbec, 1928 Bouchet, Gofas S. Bieler R, Bouchet P, Gofas S, Marshall B, Rosenberg G, La Perna R, Neubauer TA, Sartori AF, Schneider S, Vos C, ter Poorten JJ, Taylor J, Dijkstra H, Finn J, Bank R, Neubert E, Moretzsohn F, Faber M, Houart R, Picton B, Garcia-Alvarez O , 编. Elysia Risso, 1818. MolluscaBase. 2017-12-09 [2018-05-15] –通过WoRMS.  BBC News item. [2014-02-25]. （原始内容存档于2013-08-17）.  Elysia. ITIS.  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. Patrick J. Krug, Jann E. Vendetti and Ángel A Valdés. 2016. Molecular and Morphological Systematics of Elysia Risso, 1818 (Heterobranchia: Sacoglossa) from the Caribbean region. Zootaxa. 4148(1) DOI: 10.11646/zootaxa.4148.1.1 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. doi:10.1186/1742-9994-6-28 PMID 19951407. Powell A. W. B., New Zealand Mollusca, William Collins Publishers Ltd, Auckland, New Zealand 1979 ISBN 0-00-216906-1 Jensen K.R. (2007) Biogeography of the Sacoglossa (Mollusca, Opisthobranchia). Bonner Zoologische Beiträge 55:255–281 Händeler K. & Wägele H. (2007) Preliminary study on molecular phylogeny of Sacoglossa and a compilation of their food organisms. Bonner Zoologische Beiträge 55: 231-254. 维基共享资源上的相关多媒体资源：海天牛屬 YouTube上的Video of Elysia diomedea in Costa Rica