Taxonomic revision of Leucascus Dendy, 1892 (Porifera: Calcarea) with revalidation of Ascoleucetta Dendy & Frederick, 1924 and description of three new species Author Cavalcanti, Fernanda F. Author Rapp, Hans Tore Author Klautau, Michelle text Zootaxa 2013 3619 3 275 314 journal article 10.11646/zootaxa.3619.3.3 2719c069-24fe-4cd6-967d-aea11f80e344 1175-5326 221852 92C07D63-F2F5-4898-A7FE-4937F4D5A043 Key to the species of Ascoleucetta 1. Atrial skeleton composed of spicules exclusive of this region........................................... A. amitsba - Atrial skeleton composed of spicules occurring also in other regions of the sponge.................................. 2 2. Diactines are present................................................................................... 3 - Diactines are absent..................................................................... A. sagittata sp. nov. 3. Microdiatines around the inhalant apertures....................................................... A. ventricosa - Trichoxeas around the inhalant apertures......................................................... A. compressa