URMO taxon details
original description
(of ) Alder, J. (1863). Observations on the British Tunicata with descriptions of several new species. <em>Ann. Mag. Nat. Hist., ser.3.</em> 11: 153-173. [details] 
basis of record
Monniot, C. (2001). Ascidiacea & Sorberacea. <em>In: Costello, M.J. et al. (Ed.) (2001). European register of marine species: a check-list of the marine species in Europe and a bibliography of guides to their identification. Collection Patrimoines Naturels.</em> 50: pp. 352-355. (look up in IMIS) [details]
additional source
Muller, Y. (2004). Faune et flore du littoral du Nord, du Pas-de-Calais et de la Belgique: inventaire. [Coastal fauna and flora of the Nord, Pas-de-Calais and Belgium: inventory]. <em>Commission R�gionale de Biologie R�gion Nord Pas-de-Calais: France.</em> 307 pp., available online at http://www.vliz.be/imisdocs/publications/145561.pdf [details]
additional source
Vazquez, E.; Ramos-Elspa, A. A.; Turon, X. (1995). The genus Polycarpa (Ascidiacea, Styelidae) on the Atlantic and Mediterranean coasts of the Iberian Peninsula. <em>J. Zool., Lond.</em> 237: 593-614. [details] Available for editors 
additional source
van der Land, J. (ed). (2008). UNESCO-IOC Register of Marine Organisms (URMO). , available online at http://www.marinespecies.org/urmo/ [details]
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