# Aplidium

Aplidium is a genus of colonial sea squirts, tunicates in the family Polyclinidae. There are about 188 species in the genus found in shallow waters around the world.

## Species

The following species are listed in this genus according to the World Register of Marine Species:
* Aplidium abditum Kott, 2006
* Aplidium abyssum Kott, 1969
* Aplidium accarense (Millar, 1953)
* Aplidium acropodium Monniot & Gaill, 1978
* Aplidium acroporum Kott, 1992
* Aplidium adamsi Brewin, 1946
* Aplidium aegeaensis (Hartmeyer, 1904)
* Aplidium agulhaense (Hartmeyer, 1912)
* Aplidium albicans (Milne-Edwards, 1841)
* Aplidium altarium (Sluiter, 1909)
* Aplidium amorphatum Kott, 1963
* Aplidium amphibolum Millar, 1982
* Aplidium annulatum Sluiter, 1906
* Aplidium antillense (Gravier, 1955)
* Aplidium appendiculatum (Michaelsen, 1923)
* Aplidium arenatum (Van Name, 1945)
* Aplidium areolatum (Delle Chiaje, 1828)
* Aplidium asperum Drasche, 1883
* Aplidium aurorae (Harant & Vernières, 1938)
* Aplidium australiense Kott, 1963
* Aplidium bacculum Kott, 1992
* Aplidium balleniae Monniot & Monniot, 1983
* Aplidium benhami (Brewin, 1946)
* Aplidium bermudae (Van Name, 1902)
* Aplidium bilinguae Monniot & Monniot, 1983
* Aplidium bilingula Monniot & Monniot, 2006
* Aplidium brementi (Harant, 1925)
* Aplidium brevilarvacium Kott, 1963
* Aplidium brevisiphonis Millar, 1964
* Aplidium breviventer Monniot & Monniot, 2001
* Aplidium broomeiensis Millar, 1963
* Aplidium caelestis Monniot, 1987
* Aplidium caeruleum (Sluiter, 1906)
* Aplidium californicum (Ritter & Forsyth, 1917)
* Aplidium cellis Monniot, 1987
* Aplidium cerebrum Monniot & Monniot, 2001
* Aplidium challengeri Brunetti, 2007
* Aplidium chthamalum Millar, 1982
* Aplidium circulatum (Hartmeyer, 1912)
* Aplidium circumvolutum (Sluiter, 1900)
* Aplidium claviforme Hartmeyer, 1912
* Aplidium clivosum Kott, 1992
* Aplidium coei (Ritter, 1901)
* Aplidium colelloides (Herdman, 1886)
* Aplidium colini Monniot & Monniot, 1999
* Aplidium confusum Sanamyan, 2000
* Aplidium congregatum Kott, 1992
* Aplidium conicum (Olivi, 1792)
* Aplidium coniferum Kott, 1963
* Aplidium constellatum (Verrill, 1871)
* Aplidium constrictum (Sluiter, 1900)
* Aplidium controversum Monniot & Monniot, 1996
* Aplidium convergens Monniot & Monniot, 2006
* Aplidium cottrelli (Brewin, 1957)
* Aplidium crateriferum (Sluiter, 1909)
* Aplidium crustatum Monniot, Monniot, Griffiths & Schleyer, 2001
* Aplidium crustum Kott, 2008
* Aplidium cunhense Millar, 1967
* Aplidium cyaneum Monniot & Monniot, 1983
* Aplidium cyclophorum Monniot & Monniot, 2001
* Aplidium dakarensis (Peres, 1948)
* Aplidium densum (Giard, 1872)
* Aplidium depressum Sluiter, 1909
* Aplidium diaphanum (Drasche, 1883)
* Aplidium didemniformis Monniot & Gaill, 1978
* Aplidium directum Kott, 1973
* Aplidium disiphonium (Beniaminson, 1975)
* Aplidium distaplium Kott, 1992
* Aplidium draschei Brunetti, 2007
* Aplidium dubium (Ritter, 1899)
* Aplidium effrenatum (Herdman, 1886)
* Aplidium elatum Kott, 1972
* Aplidium elegans (Giard, 1872)
* Aplidium enigmaticum Monniot C. & Monniot F., 1973
* Aplidium erythraeum (Michaelsen, 1919)
* Aplidium eudistomum Kott, 2008
* Aplidium exiguum (Herdman, 1886)
* Aplidium exile (Van Name, 1902)
* Aplidium falklandicum Millar, 1960
* Aplidium fistulosum Monniot & Monniot, 1991
* Aplidium flavolineatum (Sluiter, 1898)
* Aplidium fluorescum Kott, 1992
* Aplidium foliaceum (Sluiter, 1900)
* Aplidium formosum Kott, 2006
* Aplidium fragile (Redikorzev, 1927)
* Aplidium fuegiense (Cunningham, 1871)
* Aplidium fumigatum Herdman, 1886
* Aplidium funginum (Sluiter, 1898)
* Aplidium galeritum (Hartmeyer, 1912)
* Aplidium gastrolineatum Kott, 1992
* Aplidium gelasinum Kott, 1992
* Aplidium gelatinosum (Medioni, 1970)
* Aplidium geminatum Kott, 1992
* Aplidium gibbulosum (Savigny, 1816)
* Aplidium gilvum Millar, 1982
* Aplidium glabrum (Verrill, 1871)
* Aplidium glaphyrum Millar, 1982
* Aplidium globosum (Herdman, 1886)
* Aplidium gracile Monniot & Monniot, 1983
* Aplidium griseum Kott, 1992
* Aplidium grisiatum Kott, 1998
* Aplidium haesitans Monniot, Monniot, Griffiths & Schleyer, 2001
* Aplidium haouarianum (Pérès, 1956)
* Aplidium herdmani Brunetti, 2007
* Aplidium hians (Monniot & Gaill, 1978)
* Aplidium hortulus Brunetti, 2007
* Aplidium hyacinthum Kott, 2008
* Aplidium hyalinum (Pérès, 1956)
* Aplidium imbutum Monniot & Monniot, 1983
* Aplidium incubatum Kott, 1992
* Aplidium indicum (Renganathan & Monniot, 1984)
* Aplidium inflorescens Kott, 1992
* Aplidium intextum Monniot & Monniot, 2001
* Aplidium inversum (Pérès, 1959)
* Aplidium irregulare (Herdman, 1886)
* Aplidium jacksoni Kott, 1963
* Aplidium japonicum (Tokioka, 1949)
* Aplidium knoxi (Brewin, 1956)
* Aplidium kottae Brunetti, 2007
* Aplidium kurilense (Beniaminson, 1974)
* Aplidium laevigatum (Herdman, 1886)
* Aplidium laticum Kott, 2006
* Aplidium lebedi Sanamyan, 1998
* Aplidium lenticulum Kott, 1992
* Aplidium lineatum Monniot & Monniot, 1996
* Aplidium litum Monniot & Monniot, 2006
* Aplidium lobatum Savigny, 1816
* Aplidium lodix Kott, 1992
* Aplidium longithorax Monniot, 1987
* Aplidium longum Monniot, 1970
* Aplidium loricatum (Harant & Vernières, 1938)
* Aplidium lubricum (Sluiter, 1898)
* Aplidium lunacratum Kott, 1992
* Aplidium macrolobatum Kott, 1992
* Aplidium magellanicum Sanamyan & Schories, 2003
* Aplidium magnilarvum Kott, 1992
* Aplidium marchei (Monniot, 1969)
* Aplidium maritimum (Brewin, 1958)
* Aplidium maroccanum (Sluiter, 1927)
* Aplidium maru Monniot & Monniot, 1987
* Aplidium mauritaniae Sluiter, 1915
* Aplidium mediterraneum (Hartmeyer, 1909)
* Aplidium meridianum (Sluiter, 1906)
* Aplidium mernooensis (Brewin, 1956)
* Aplidium millari Monniot & Monniot, 1994
* Aplidium minisculum Kott, 1992
* Aplidium miripartum Monniot & Monniot, 1983
* Aplidium monile Monniot, Monniot, Griffiths & Schleyer, 2001
* Aplidium monoophorum Millar, 1975
* Aplidium monotonicum (Tokioka, 1954)
* Aplidium multilineatum Kott, 1992
* Aplidium multipapillatum Millar, 1975
* Aplidium multiplicatum Sluiter, 1909
* Aplidium multisulcatum Millar, 1977
* Aplidium mutabile (Sars, 1851)
* Aplidium nadaense (Nishikawa, 1980)
* Aplidium nema Monniot F. & Monniot C., 1976
* Aplidium nordmanni (Milne-Edwards, 1841)
* Aplidium nottii (Brewin, 1951)
* Aplidium novaezealandiae Brewin, 1952
* Aplidium oamaruensis (Brewin, 1950)
* Aplidium ocellatum Monniot C. & Monniot F., 1987
* Aplidium opacum Kott, 1963
* Aplidium ordinatum (Sluiter, 1906)
* Aplidium ornatum Kott, 1992
* Aplidium orthium Millar, 1982
* Aplidium ovum Monniot & Gaill, 1978
* Aplidium paessleri (Michaelsen, 1907)
* Aplidium pallidum (Verrill, 1871)
* Aplidium panis Kott, 2008
* Aplidium pantherinum (Sluiter, 1898)
* Aplidium paralineatum Kott, 1992
* Aplidium parastigmaticum Kott, 1992
* Aplidium parvum Kott, 1963
* Aplidium patriciae Brunetti, 2007
* Aplidium pellucidum (Leidy, 1855)
* Aplidium pentatrema (Monniot, 1972)
* Aplidium pererratum (Sluiter, 1912)
* Aplidium peresi Monniot, 1970
* Aplidium peruvianum Sanamyan & Schories, 2004
* Aplidium petrense Michaelsen, 1916
* Aplidium petrosum Kott, 1992
* Aplidium phortax (Michaelsen, 1924)
* Aplidium pictum Monniot & Monniot, 2001
* Aplidium pliciferum (Redikorzev, 1927)
* Aplidium polarsterni Tatian, Antacli & Sahade, 2005
* Aplidium polybunum (Redikorzev, 1927)
* Aplidium polyglossum Redikorzev, 1930
* Aplidium polytrema (Monniot C. & Monniot F., 1983)
* Aplidium powelli (Brewin, 1958)
* Aplidium profundum (Sluiter, 1909)
* Aplidium proliferum (Milne-Edwards, 1841)
* Aplidium pronum Kott, 1975
* Aplidium propinquum (Van Name, 1945)
* Aplidium protectans (Herdman, 1899)
* Aplidium pseudolobatum (Pérès, 1956)
* Aplidium pseudoradiatum Millar, 1982
* Aplidium punctum (Giard, 1873)
* Aplidium pusillum Monniot & Monniot, 1991
* Aplidium quadrisulcatum Millar, 1960
* Aplidium quadriversum Millar, 1982
* Aplidium quinquesulcatum Millar, 1977
* Aplidium radiatum (Sluiter, 1906)
* Aplidium radicosum (Monniot C. & Monniot F., 1979)
* Aplidium recumbens (Herdman, 1886)
* Aplidium retiforme (Herdman)
* Aplidium rhabdocormi Nishikawa, 1990
* Aplidium ritteri (Sluiter, 1895)
* Aplidium robustum Kott, 1992
* Aplidium rosaceum Monniot & Monniot, 2001
* Aplidium rosarium Kott, 1992
* Aplidium rubricollum Kott, 1963
* Aplidium rubripunctum Monniot & Monniot, 1997
* Aplidium rubrum (Tokioka, 1962)
* Aplidium ruzickai Sanamyan & Gleason, 2009
* Aplidium sacciferum Monniot & Monniot, 2001
* Aplidium sagamiense (Tokioka, 1967)
* Aplidium sagresensis Ramos-Espla, Turon & Vazquez, 1993
* Aplidium sarasinorum (Fiedler)
* Aplidium scabellum (Michaelsen, 1924)
* Aplidium schaudinni Hartmeyer, 1903
* Aplidium schultzei Hartmeyer, 1913
* Aplidium scyphus Monniot & Monniot, 1991
* Aplidium seeligeri Millar, 1960
* Aplidium siderum Monniot & Monniot, 1983
* Aplidium siphonum (Brewin, 1956)
* Aplidium soldatovi (Redikorzev, 1937)
* Aplidium solidum (Ritter & Forsyth, 1917)
* Aplidium solum Monniot & Monniot, 1974
* Aplidium spauldingi (Ritter, 1907)
* Aplidium spitzbergense Hartmeyer, 1903
* Aplidium spongiforme (Herdman, 1886)
* Aplidium stanleyi Millar, 1960
* Aplidium stellatum (Verrill, 1871)
* Aplidium stelliferum (Sluiter, 1900)
* Aplidium tabachniki Sanamyan & Sanamyan, 1999
* Aplidium tabarquensis Ramos-Espla, 1991
* Aplidium tabascum Kott, 1992
* Aplidium takii (Tokioka, 1959)
* Aplidium tasmaniensis Sanamyan & Sanamyan, 1999
* Aplidium tenuicaudum (Beniaminson, 1974)
* Aplidium thomasi Brewin, 1948
* Aplidium thomsoni Brewin, 1946
* Aplidium translucidum (Ritter, 1901)
* Aplidium traustedti Millar, 1977
* Aplidium tridentatum (Daumézon, 1909)
* Aplidium triggsense Kott, 1963
* Aplidium tuberosum Kott, 2008
* Aplidium turbinatum (Savigny, 1816)
* Aplidium undulatum Monniot & Gaill, 1978
* Aplidium unicornum Millar, 1982
* Aplidium uouo Monniot & Monniot, 1987
* Aplidium urgorrii Vazquez, 1994
* Aplidium uteute Monniot & Monniot, 1987
* Aplidium vanhoeffeni Hartmeyer, 1911
* Aplidium variabile (Herdman, 1886)
* Aplidium vastum (Sluiter, 1912)
* Aplidium vemense Millar, 1968
* Aplidium vexillum Monniot & Gaill, 1978
* Aplidium violaceum (Hartmeyer, 1912)
* Aplidium vulcanium Monniot & Monniot, 2001
* Aplidium wroomeiensis Millar, 1963
* Aplidium yamazii (Tokioka, 1949)
* Aplidium yezoense Tokioka, 1967