This short communication had compared distribution through times between two taxa: Actiniaria and Rugosa. This analysis can to see distribution larval is unlucky when planulae larvae swimming to find out a substratum and this distribution disappeared

Cnidarians are the most primitive metazoans, but their evolutionary relationships are poorly understood, although recent studies present several phylogenetic hypotheses. Here, we collected 266 complete cnidarian mitochondrial genomes and re‐evaluated

The hydrozoan family Eirenidae is known scientifically for its morphological plasticity and challenges in species identification. We used an integrative taxonomic approach based on morphological, molecular and life history evidence to systematically assess