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 Leucascus 1. Skeleton composed only of triactines............................................................ L. protogenes - Skeleton composed of triactines and tetractines.............................................................. 2 2. Diactines present...................................................................................... 3 - Diactines absent....................................................................................... 4 3. Diactines are club-shaped....................................................................... L. clavatus - Diactines are microdiactines................................................................. L. albus sp. nov. 4. Tripods are present.................................................................................... 5 - Tripods are absent..................................................................................... 6 5. Only normal tripods......................................................................... L. leptoraphis - Some tripods with a fourth rudimentary actine........................................................ L. lobatus 6. Colour alive pink and atrial skeleton composed mainly of tetractines....................................... L. roseus - Atrial skeleton composed mainly of triactines............................................................... 7 7. Choanocyte tubes are mainly smooth............................................................... L. simplex - Choanocyte tubes are mainly hispid....................................................................... 8 8. Colour alive white....................................................................... L. neocaledonicus - Colour alive yellow....................................................................... L. flavus sp. nov.