First insights into the phylogeny of the order Cribrariales (Amoebozoa, Myxomycetes), with the definite exclusion of the genus Enteridium

The order <i>Cribrariales</i> is among the least studied higher groups in the <i>Myxomycetes</i>, with numerous taxonomic problems and scarce molecular data available in public databases. Of the three genera currently accepted, viz. <i>Cribraria</i>, <i>Lindbladia</i>, and <i>Enteridium</i>, the last one shows a set of morphological characters clearly disagreeing with the two former ones. Using a representative sampling and two unlinked loci (nuclear and mitochondrial SSU), we assessed the phylogenetic relationships in the bright-spored <i>Myxomycetes (Lucisporomycetidae)</i> and concluded that the genus <i>Enteridium</i> must be excluded from the order <i>Cribrariales</i> and placed instead within the order <i>Trichiales</i>, family <i>Dianemataceae</i>. We provide detailed explanations of why this genus has been misclassified in previous studies, and define its morphological and molecular boundaries, performing two necessary new combinations. On the other hand, the phylogeny of the order <i>Cribrariales</i> s.str. shows three main lineages that are distinguished as three subgenera, viz. C. subg. Cribraria, C. subg. Dictydium, and C. subg. Ionokylix<b>subg. nov.</b>, the first one including the genus <i>Lindbladia</i> deeply nested and therefore treated as a heterotypic synonym of <i>Cribraria</i>.