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Annette F. Govindarajan, Ann Bucklin, Laurence P. Madin, A molecular phylogeny of the Thaliacea, Journal of Plankton Research, Volume 33, Issue 6, June 2011, Pages 843–853,...

Systematic division of ascidian species following the Ascidiacea World Database. https://doi.org/10.1371/journal.pone.0020657.s001. Supplementary material from Shenkar N, Swalla...

Steven J. Hageman, Complexity Generated by Iteration of Hierarchical Modules in Bryozoa, Integrative and Comparative Biology, Volume 43, Issue 1, February 2003, Pages 87–98,...

Paulyn Cartwright, Developmental Insights into the Origin of Complex colonial Hydrozoans, Integrative and Comparative Biology, Volume 43, Issue 1, February 2003, Pages 82–86,...

JOHN S. RYLAND (1997) Reproduction in Zoanthidea (Anthozoa: Hexacorallia), Invertebrate Reproduction & Development, 31:1-3, 177-188, DOI: 10.1080/07924259.1997.9672575

Catherine S. McFadden, Juan A. Sánchez, Scott C. France, Molecular Phylogenetic Insights into the Evolution of Octocorallia: A Review, Integrative and Comparative Biology,...

LISBETH FRANCIS, Contrast Between solitary and Clonal Lifestyles in the Sea Anemone Anthopleura elegantissima, American Zoologist, Volume 19, Issue 3, August 1979, Pages...

Berking, S., 2007. Generation of bilateral symmetry in Anthozoa: a model. Journal of theoretical biology, 246(3), pp.477-490.

Grigory Genikhovich, Ulrich Technau; On the evolution of bilaterality. Development 1 October 2017; 144 (19): 3392–3404. doi: https://doi.org/10.1242/dev.141507

Dunn, C.W., Leys, S.P. and Haddock, S.H., 2015. The hidden biology of sponges and ctenophores. Trends in ecology & evolution, 30(5), pp.282-291.

Schilthuizen, M. and Davison, A., 2005. The convoluted evolution of snail chirality. Naturwissenschaften, 92(11), pp.504-515.

Chia, Fu-Shiang. “Systematics of the Six-Rayed Sea Star, Leptasterias, in the Vicinity of San Juan Island, Washington.” Systematic Zoology, vol. 15, no. 4, 1966, pp. 300–06....

Frederick H. C. Hotchkiss, On the Number of Rays in Starfish, American Zoologist, Volume 40, Issue 3, June 2000, Pages 340–354, https://doi.org/10.1093/icb/40.3.340

Grabowsky, G.L., 1994. Symmetry, locomotion, and the evolution of an anterior end: a lesson from sea urchins. Evolution, 48(4), pp.1130-1146.

Smirnov, A.V. Sea cucumbers symmetry (Echinodermata: Holothuroidea). Paleontol. J. 48, 1215–1236 (2014). https://doi.org/10.1134/S0031030114120107

Paul, C.R.C. and Smith, A.B., 1984. The early radiation and phylogeny of echinoderms. Biological Reviews, 59(4), pp.443-481.