RESEARCH ARTICLE A metameric origin for the

re te m ib be er se-sh im What is “sufficient ” has to be decided in each case ” tions evolved independently in several metazoan lineages [4-6]. Defenders of both views have advanced valuable Starunov et al. BMC Evolutionary Biology (2015) 15:25 DOI 10.1186/s12862-015-0299-zthe other side, intriguing similarities have nevertheless75013 Paris, France Full list of author information is available at the end of the articlearguments in recent years. On one side, the overall pic-ture of current knowledge seems to suggest that the ways segments are made in distant groups of segmented bilaterians, such as insects and vertebrates, are very di-vergent at morphogenetic, cellular and genetic levels. O