Recent advances in ecology and systematics of sponges Sci. Mar. 57(4): 1993

FOREWORD

Foreword Mª Jesús Uriz and Klaus Rützler Sci. Mar. 57(4) : 0-0

RESEARCH ARTICLES

A prototype expert system involved in classificatory tasks for sponge identification Marta Domingo Sci. Mar. 57(4) : 273-282

A systematic revision of the central West Atlantic: Halichondrida (Demospongiae, Porifera). Part III: Description of valid species M.C. Diaz, S.A. Pomponi and R.W.M. Van Soest Sci. Mar. 57(4) : 283-306

Some new of poorly known sponges of the Balearic Islands (western Mediterranean) Maria Antonia Bibiloni Sci. Mar. 57(4) : 307-318

Taxonomy, phylogeny and biogeography of the marine sponge genus Rhabderemia Topsent, 1890 (Demospongiae, Poecilosclerida) R.W.M. Van Soest and J.N.A. Hooper Sci. Mar. 57(4) : 319-351

Redescriptions of some rare sponge species in the western Mediterranean M.J. Uriz and M. Maldonado Sci. Mar. 57(4) : 353-366

Cosmopolitism in sponges: The "complex" Guitarra fimbriata with description of a new species of Guitarra from the northeast Atlantic Nicole Boury-Esnault, Maurizio Pansini and M.J. Uriz Sci. Mar. 57(4) : 367-373

Spongionella foliascens: a new foliose Dendroceratid sponge from the western Atlantic Michelle Kelly-Borges, Shirley A. Pomponi and Jean Vacelet Sci. Mar. 57(4) : 375-379

The genus Terpios (Suberitidae) and new species in the "Lobiceps" complex Klaus Rützler and Kathleen P. Smith Sci. Mar. 57(4) : 381-393

Terpios hoshinota, a new cyanobacteriosponge threatening Pacific reefs Klaus Rützler and Katherine Muzik Sci. Mar. 57(4) : 395-403

Effects of reproduction in Clionia viridis (Hadromerida) on zooxanthellae Dolors Rosell Sci. Mar. 57(4) : 405-413

Influence of depth on the size of sponge spicules Giorgio Bavestrello, Michela Bonito and Michele Sarŕ Sci. Mar. 57(4) : 415-420

Silica content and spicular size variation during an annual cycle in Chondrilla nucula Schmidt (Porifera, Demospongiae) in the Ligurian Sea Giorgio Bavestrello, Michela Bonito and Michele Sarŕ Sci. Mar. 57(4) : 421-425

Antimicrobial activity of Southwestern Atlantic shallow-water marine sponges (Porifera) Guilherme Muricy, Eduardo Hajdu, Fabio V. Araujo and Allen N. Hagler Sci. Mar. 57(4) : 427-432

INDEX

Subject index, Author index, Taxonomic index - Sci. Mar. 57(4) : 433-443