Skip to main content
Fig. 7 | BMC Evolutionary Biology

Fig. 7

From: Taxon-specific expansion and loss of tektins inform metazoan ciliary diversity

Fig. 7

Phylogenetic tree to illustrate the evolution of Tektin-4 in bilaterian species. This phylogenetic analysis includes the Tektin-4 sequences identified in bilaterian species. The 23 spiralians include six mollusks (Ac, Bg, Ob, Lg, Cg, Pf), 12 platyhelminthes (Cs, Ov, Sch, Scm, Scj, Eg, Emu, Taa, Tas, Hmi, Sme, and Mli), three annelids (Pd, Ct, Hr), and one brachiopod (La). The ecdysozoans include many insects, two chelicerates (Pt, Smi), one myriapod (Sma), and one priapulid (Pc). The invertebrate deuterostomes are represented by one echinoderm (Sp), one hemichordate (Sk), one cephalochordate (Bf), and one urochordate (Ci). The vertebrate deuterostomes are represented by three teleost fish (Dr, Tr, and Ch), one holostei fish (Lo), one chondrichthyes (Cm), one sarcopterygian fish (Lc), three amphibian (Xl, Amb, Nvi), one reptile (Cpb) two avians (Ap, Gg), and three mammal species (Oa, Mm, Hs). In addition, Tektin-3/5 sequences from B. floridae, S. kowalevskii, S. purpuratus, D. melanogaster and T. castaneum were included as an outgroup. The tree was rooted with N. vectensis Tektin-1/4/3/5A. Both Bayesian and Maximum Likelihood analyses were performed using Mr. Bayes and RAxML, respectively. The Bayesian tree topology is shown. Node support is shown for non-terminal nodes. Posterior probability values from Mr. Bayes and bootstrap values from RAxML are shown above or below each node, respectively. Diamonds indicate support less than 80%. “X” under a node indicates that this node was not recovered in the RAxML maximum likelihood tree. The large colored boxes group Tektin-4 sequences of the three major bilaterian branches, the spiralians (green), the ecdysozoans (blue), and the deuterostomes (orange). The smaller colored boxes within ecdysozoans and spiralians highlight two gene duplications of tektin-4 at the base of insect lepidopterans (purple), and one duplication in the Platyhelminthes lineage including the planarian Sm and the parasitic trematodes and cestodes, but excluding the flatworm Mli (dark green), respectively. Note that only two platyhelminthes species retained both Tektin-4a and -4b (Sme and Cs), while others lost one of the duplicates (Eg, Emu, Ov, Taa, Tas, Hmi, Sch, Scm, Scj). Note that tektin-4 exists as a single copy gene in most extant species with only one additional duplicated Tektin-4 gene observed in the spiralian leech (Hr). Species abbreviations and accession numbers for each sequence are provided in Additional file 5

Back to article page