No longer Demospongiae: Homoscleromorph formal nimination as a fourth class of porifera

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Gazave, Eve | Lapébie, Pascal | Ereskovsky, Alexander | Vacelet, Jean | Renard, Emmanuelle | Cárdenas, Paco | Borchiellini, Carole

Edité par CCSD ; Springer -

International audience. Over the past few years, there has been growing interest among the sponge community in the phylogenetic position of the Homoscleromorpha (i.e. within or outside the class Demospongiae). Recent molecular analyses clearly show that the Homoscler-omorpha forms a distinct clade separated from the Demospongiae and is composed of two families, Oscarellidae and Plakinidae. Within the currently more widely accepted hypothesis of a monophyletic Porifera, we formally propose here to raise Homos-cleromorpha to the class rank (the fourth one). We, therefore, provide a definition and a formal diagnosis. In the supplementary materials, we also present an alternative classification of the Homoscleromorpha, following the PhyloCode.

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