Straight-Chain Acetylenes as Chemotaxonomic Markers of the Marine Haplosclerida -- Relationships Within and Between the Orders of Demospongiae that Lack a Mineral Skeleton -- Unreliability of Demosponge Skeletal Characters: The Example of Halichondria panicea -- Spicule Form and Morphogenesis in the Calcareous Sponge Leuconia fistulosa (Johnston) -- Biogeographic Scenarios of Marine Demospongiae -- A Biogeographic and Evolutionary Survey of the Genus Tethya (Porifera, Demospongiae) -- Toward a Panbiogeography of the Seas: Sponge Phylogenies and General Tracks -- A Two-Sponge Associations from Komun Island, Korea -- Sponges as Biomarkers of the Aquatic Environment: Application of Molecular Probes -- Molecular Biological and Paleontological Evidence that Eumetazoa, Including Porifera (Sponges), are of Monophyletic Origin -- Molecular Evidence for Early Evolution of Metazoa -- Larval Flagellated Cells Transform to Choanocytes in Demosponge Metamorphosis -- The Ultrastructure of Spermatozoa and Its Structural Change in the Choanocytes of Sycon calcaravis Hozawa -- The Involvement of Two Carrier Cells in Fertilization and the Ultrastructure of the Spermiocyst in Sycon calcaravis -- Exogenous Cyclic AMP (cAMP) and Dibutyryl-Cyclic AMP (DB-cAMP) Induce in vitro -- Morphological Variations in the Choanocytes of Clathrina cerebrum (Porifera, Calcarea) -- Fusion and Cytoplasmic Streaming are Characteristics of at Least Two Hexactinellids: Examination of Cultured Tissue from Aphrocallistes vastus -- Factors Influencing Tissue Reconstitution by Dissociated Sponge Cells -- Three-Dimensional Architecture of the Canal System of Some Hadromerids (Porifera, Demospongiae) -- An Ultrastructural Study of the Contractile Filament in the Pinacocyte of a Freshwater Sponge -- Crustacean Infauna of the Demosponge Halichondria okadai (Kadota) with Reference to the Life Cycle of Gnathia sp. (Isopoda: Gnathiidea) -- Taxonomy and Distribution of Brazilian Spongillites -- Status of Freshwater Sponge Study in China -- A Study of the Freshwater Sponges of the Lakes in Yunnan -- A Scanning Electron Microscopy Study on Spicules, Gemmule Coats, and Micropyles of Japanese Freshwater Sponges -- Radiosensitivity of Freshwater Sponge Gemmules -- Endogenous Circanual Rhythm, Like a Biological Clock, Controls Gemmule Germination in Spongilla alba -- Feasibility Studies of the Space Experiment on the Development of the Freshwater Sponge Ephydatia fluviatilis -- Freshwater Sponge Culture in the Aquarium -- The Whys and Whats of Sponge Chemistry: Why Chemists Extract Sponges and What Problems Does This Cause? -- Manzamine-Related Alkaloids from Okinawan Marine Sponges -- Likely Microbial Participation in the Production of Bioactive Marine Sponge Chemical Constituents -- Andrimid, an Antimicrobial Substance in the Marine Sponge Hyatella, Produced by an Associated Vibrio Bacterium -- Antifouling and Metamorphosis-Promoting Compounds from the Marine Sponges Pseudoceratina purpurea and Agelas mauritiana -- Antifouling Compounds against Barnacle (Balanus amphitrite) Larvae from the Marine Sponge Acanthella cavernosa -- The Sponge in the History of Japanese Biology

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