Abstract
In this study, we describe a new species of Latrunculia (Demospongiae: Poecilosclerida) from shallow waters in Rio de Janeiro, south-eastern Brazil. Latrunculia (Biannulata) janeirensis sp. nov. is cushion-shaped, brown in color, with raised oscular papillae and spherical or fungiform areolate porefields, a confused choanosomal skeleton without spicule tracts, and small styles. The developmental stages of the anisodiscorhabds have a thin axis and four whorls with irregular, non-ramified rays. The manubrium and the median whorl are only slightly larger than the apical and subsidiary whorls, making the spicule appear almost symmetrical. Fully developed anisodiscorhabds have a stout axis; the apical whorl is ramified, spined, with leaf-like rays. The manubrium is larger and smoother than the apical whorl, and the median and subsidiary whorls have pointed, spined rays fused only at their bases. This is the first species of Latrunculia described from Rio de Janeiro State and the second from Brazil. This new record extends the distribution of the subgenus Biannulata to the south-western Atlantic.
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Acknowledgments
Amanda Garcez helped with SEM operation in the ‘Centro de Microscopia Eletrônica do Museu Nacional’ (Rede Temática Monitoramento Ambiental Marinho, SAPE 4600225483). We thank Welington Vieira and Daniela Batista, who kindly sent us specimens and underwater photographs of the new species, and Mauricio Fernandes for the identification of the gastropod associated to the sponge. The suggestions of Dr. Michelle Kelly (National Institute of Water & Atmospheric Research, Auckland, New Zealand) and of an anonymous reviewer greatly improved the manuscript. We are grateful to Dr. Alvaro Monteiro (H. Lee Moffitt Cancer Center & Research Institute in Tampa, USA) for grammatical revision. We also thank the Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq), Fundação Carlos Chagas Filho de Apoio à Pesquisa (FAPERJ) and PETROBRAS for grants and fellowships.
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Cordonis, C., Moraes, F. & Muricy, G. A new species of Latrunculia (Biannulata) (Porifera: Demospongiae) from Rio de Janeiro, south-eastern Brazil. Mar Biodiv 43, 105–111 (2013). https://doi.org/10.1007/s12526-012-0132-5
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DOI: https://doi.org/10.1007/s12526-012-0132-5