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Revista Brasileira de Zoologia

Print version ISSN 0101-8175

Rev. Bras. Zool. vol.19 no.4 Curitiba Dec. 2002 

Trididemnum maragogi sp. novo (Ascidiacea, Didemnidae) trom Alagoas, Northeastern Brazil1



Rosana Moreira da Rocha

Departamento de Zoologia, Universidade Federal do Paraná. Caixa Postal 19020, 81531-980 Curitiba, Paraná, Brasil. E-mail:




The new species of didemnid ascidian, Trididemnum maragogi sp. nov., is described from the Northeastern Brazilian coast. Many small colonies aggregate on calcareous algae. They are brown and more or less covered by spicules, depending on exposure to the sun, which suggests the presence of symbiotic algae. This species is characterized by a non pigmented zooid with a very long oral siphon bordered by six finger-like lobes, a branchial sac with anterior and posterior non perforated areas, a short muscular process on the esophageal peduncle and a testis with one large follicle partially surrounded by 6-7 coils of the sperm duct.

Key words: Ascidiacea taxonomy, Didemnidae, Trididemnum, Northeastern Brazil



Full text available only in PDF format.

Texto completo disponível apenas em PDF.



ACKNOWLEDGEMENTS. The author would like to thank the Electronic Microscopy Center of the Universidade Federal do Paraná for S.E.M. work and CNPq for a research grant. Thanks also to Jim Roper for reviewing the English text.



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Received in 10.VI.2002; accepted in 02.X.2002.



1 Contribuição número 1318 do Departamento de Zoologia, Universidade Federal do Paraná.

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