Pérez-Portela, R., Goodwin, C.E., Picton, B.E. and Turon, X. 2010. Pycnoclavella stolonialis n. sp. (Tunicata: Ascidiacea), with phylogenetic and distributional remarks on the genus in Europe. Zootaxa. 2407, 1 (Mar. 2010), 51–66. DOI:https://doi.org/10.11646/zootaxa.2407.1.3.