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Fig. 3 | BMC Evolutionary Biology

Fig. 3

From: Globins in the marine annelid Platynereis dumerilii shed new light on hemoglobin evolution in bilaterians

Fig. 3

Maximum likelihood tree of metazoan globin sequences. LG model of amino acid substitution was used and a SH-like test of a data set of 272 sequences from 24 metazoan species. To improve readibility and facilitate annotations, a simplified tree version is used (extensive version of the tree in Additional file 5). Gene names do not appear and branches have been color-coded according to the clade of the metazoan tree in which they occur (colour code in the box on the right). The tree is arbitrarily rooted outside of the natural clades. Green and red diamonds indicate a number of nodes that are supported by aLRT values superior to 0.75 and 0.95, respectively. The tree shows 5 groups (clades I–V, ), including 4 with well-supported nodes (clade I–IV), encompassing sequences of most bilaterian phyla. An additional well-supported node groups together only spiralian species sequences. Platynereis sequences are indicated by their names and thicker red branches

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