Calcareous sponges from New Caledonia Author Borojevic, Radovan Departamento de Histologia e Embriologia, Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Caixa Postal 68021, 21941 - 970 Rio de Janeiro (Brazil) radovan @ iq. ufrj. br radovan@iq.ufrj.br Author Klautau, Michelle Federal de Ensino Tecnologico de Quimica, Unidade de Rio de Janeiro, Senador Furtado 121 / 125, Maracana, 20270 - 021 Rio de Janeiro (Brazil) text Zoosystema 2000 22 2 187 201 journal article 10.5281/zenodo.5399987 1638-9387 5399987 Family LEUCALTIDAE Dendy & Row, 1913 DIAGNOSIS. — Clathrinida with either a tubular, ramified or anastomosed cormus with many oscula, or in the form of single tubes with a large terminal single osculum. The tubes have a large atrium surrounded by a strong wall composed of a distinct cortex and a choanosome. The cortical skeleton is composed of large tangential triactines and/or tetractines. The choanoskeleton can be absent, reduced to apical actines of cortical tetractines, or contains small and irregularly dispersed triactines and tetractines.