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A new sibling species of Notobryon (Gastropoda, Nudibranchia) from the Caribbean Sea

  • M. Caballer (a1) (a2) and J. Ortea (a3)

Abstract

A new Scyllaeidae of the genus Notobryon is described from Guadeloupe, in the Lesser Antilles. Notobryon caribbaeus sp. nov. is characterized by having the anterior pair of body lobes remarkably bigger than the posterior pair, a stomach with eight triangular plates, a black and very wide ampulla, a lemon-shaped bursa copulatrix and a complex and well-differentiated sponge-like prostate. The first Caribbean records of Notobryon were provisionally assigned to the Australian species Notobryon cf. wardi and later transferred to Notobryon panamica. However, the structure of the male genital system is one of the main morphological characters to discriminate species in the genus and the presence of a prostate in N. caribbaeus sp. nov. distinguishes it from N. panamica, which remains confined to the eastern Pacific. Of the remaining four species in the world, only Notobryon bijecurum shares this character, but its external anatomy is different: it lacks a bursa copulatrix and the deferent duct is much shorter. Notobryon caribbaeus sp. nov. was captured in the context of an intensive expedition (‘Karubenthos’) organized by the Muséum National d'Histoire Naturelle, Paris and its description raises the total inventory of sea slugs in Guadeloupe to 150.

Copyright

Corresponding author

Correspondence should be addressed to: M. Caballer, Muséum National d'Histoire Naturelle, 55 rue de Buffon, 75005 Paris, France email: manuelcaballergutierrez@hotmail.com

References

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Baba, K. (1937) Two new species of the nudibranchiate genus Notobryon from Sagami Bay, Japan. Venus: the Japanese Journal of Malacology 7, 165170.
Baba, K. (1949) Opisthobranchia of Sagami Bay collected by His Majesty the Emperor of Japan. Tokyo: Iwanami Shoten.
Odhner, N.H. (1936) Nudibranchia Dendronotacea—a revision of the system. Mémoires du Musée Royal d'Histoire Naturelle de Belgique 2, 10571128.
Ortea, J., Espinosa, J., Buske, Y. and Caballer, M. (2013) Additions to the inventory of the sea slugs (Opisthobranchia and Sacoglossa) from Guadeloupe (Lesser Antilles, Caribbean Sea). Revista de la Academia Canaria de Ciencias XXV, 163194.
Ortea, J., Espinosa, J., Caballer, M. and Buske, Y. (2012) Initial inventory of the sea slugs (Opisthobranchia and Sacoglossa) from the expedition Karubenthos, held in may 2012 in Guadaloupe (Lesser Antilles, Caribbean Sea). Revista de la Academia Canaria de Ciencias XXIV, 153182.
Pola, M., Camacho-Garcia, Y.E. and Gosliner, T.M. (2012) Molecular data illuminate cryptic nudibranch species: the evolution of the Scyllaeidae (Nudibranchia: Dendronotina) with a revision of Notobryon. Zoological Journal of the Linnean Society 165, 311336.
Valdés, Á., Hamann, J., Behrens, D.W. and DuPont, A. (2006) Caribbean sea slugs: a field guide to the opisthobranch mollusks from the tropical Northwestern Atlantic. Silverdale, WA: Sea Challengers Natural History Books.

Keywords

A new sibling species of Notobryon (Gastropoda, Nudibranchia) from the Caribbean Sea

  • M. Caballer (a1) (a2) and J. Ortea (a3)

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