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Fig. 1 | BMC Genomics

Fig. 1

From: Cestode strobilation: prediction of developmental genes and pathways

Fig. 1

Platyhelminth evolutionary relationships and segmentation features. The phylogenomic tree (left) was built by MrBayes software with the VT + I + G evolutive model, for 1,688,000 generations, and with a set of 285 orthologs shared by all species. Platyhelminth species are highlighted, with the trematodes (flukes) shaded in light gray and the cestodes (tapeworms) shaded in dark gray. The numbers at the branches are Bayesian posterior probability values. Acelomated (platyhelminths), pseudocoelomated (nematodes), and coelomated (mollusk and annelid) species and corresponding segmentation features are indicated: external segmentation refers to segmented external structures derived from the epidermis (e.g. proglottids in cestodes); neural segmentation refers to ganglia repetition along the longitudinal axis (e.g. the “ladder-like” nervous system of cestodes); segmented structures refer to repeated organs or other anatomical features derived from the mesoderm (e.g. the repeated gonads in cestodes). Cartoons (right) illustrate the metamerism in flukes and full strobilation in tapeworms. Y = yes; N = no; n.a. = not applicable

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