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Fig. 4 | BMC Evolutionary Biology

Fig. 4

From: Evolution of dental tissue mineralization: an analysis of the jawed vertebrate SPARC and SPARC-L families

Fig. 4

Favored model for the evolution of gene content and ameloblastic expression in gnathostomes. A cladogram shows the classically accepted phylogenetic relationships of Scyliorhinus canicula (S.c.), Raja clavata (R.c.), Lepisosteus oculatus (L.o.), Danio rerio (D.r.), Takifugu rubripes (T.r.), Latimeria chalumnae (L.c.), Xenopus tropicalis (X.t.) and Mus musculus (M.m.), as well as putative ancestral situations and polarized evolutionary changes. Pentagons summarize the gene content identified in each species and inferred to have existed in their last common ancestor. Ameloblastic gene expression status is summarized as transcribed (blue), undetected (white) or unknown (grey). Dotted arrows represent unresolved ambiguities with respect to the origin of the SCPP members. See text for details and references

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