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 Genus Leucaltis Haeckel, 1872 TYPE SPECIES . — Leucaltis ( Leucaltusa ) clathria Haeckel, 1872 by subsequent designation (Dendy & Row 1913). DIAGNOSIS. — Leucaltidae with a body composed of large, ramified and anastomosed tubes. Each tube has a distinct strong cortex supported by large triactines and tetractines. The choanosome is organized in elongate, radial chambers, which open to the central atrial cavity. It is supported by apical actines of cortical tetractines and small scattered triactines and tetractines.