original description(ofClavelina nana Lahille, 1890)Lahille, M. F. (1890). Recherches sur les Tuniciers des cotes de France. Toulouse. 330p.[details]
redescriptionPérez-Portela, R.; Duran, S.; Palacín, C.; Turon, X. (2007). The genus Pycnoclavella (Ascidiacea) in the Atlanto-Mediterranean region: a combined molecular and morphological approach. Invertebrate Systematics. 21(2): 187-205., available online athttps://doi.org/10.1071/is06015[details] Available for editors