Keratosa is 'n subklas binne die stam van die Porifera (sponsdiere). Dendroceratida Dictyoceratida Grant, R.E. 1861. Tabular view of the primary divisions of the Animal Kingdom, intended to serve as an outline of an elementary course of recent Zoology (Cainozoology), or the Natural history of existing animals. Walton and Maberly: London. i–vi + 1–91.