Figure 6 from: Hasegawa N, Kajihara H (2019) A redescription of Syncarpa composita (Ascidiacea, Stolidobranchia) with an inference of its phylogenetic position within Styelidae. ZooKeys 857: 1-15. https://doi.org/10.3897/zookeys.857.32654

Figure 6 Phylogenetic relationship of 28 styelid ascidians. ML tree generated from concatenated sequences of 18S (1582 bp) and COI (686 bp). Numbers on nodes indicate bootstrap values and, where applicable, posterior probabilities. Scale bar indicates number of substitutions per site. B, P, and S represented Botryllinae, Polyzoinae, and Styelinae.