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 HETEROPIIDAE Dendy, 1892 DIAGNOSIS. — Leucosoleniida with a syconoid or leuconoid organization. The choanoskeleton is composed of a proximal layer of subatrial triactines and a distinct distal layer of pseudosagittal triactines and/or pseudosagittal tetractines, often separated by an intermediate layer that is supported by several rows of triactines and/or tetractines. The atrial skeleton is well-developed.