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  1. Approach to the phylogeny of Axinellidae ( Porifera ; Demospongiae) using morphological and molecular data
    By: Alvarez, B
    Type: Article
    In: Memoirs of The Queensland Museum
    Volume: 44
    Date: 1999
    Page Range: 43--43
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  2. A new sponge species, Ceratopsion crustosum (Demospongiae: Raspailiidae), from deep waters of the Gulf of Mexico
    By: Alvarez, B - Soest, Rob W. M. van.
    Type: Article
    In: Proceedings of The Biological Society of Washington
    Volume: 106
    Date: 1993
    Page Range: 629--632
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