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Boury-Esnault, N.; Volkmer-Ribeiro, C. (1991). The Porifera: description of a new taxon Balliviaspongia wirrmanni n.g., n.sp. Pp. 295-301. In: Dejoux, C. & Iltis, A. (Eds), Lake Titicaca: a synthesis of limnological knowledge. Monographiae Biologicae, 68. (Kluwer Academic: Dordrecht, Boston, London): i-xxiv, 1.