Malformation in the crab Ucides cordatus (Linnaeus, 1763) (Crustacea, Brachyura, Ocypodidae), in São Vicente (SP), Brazil.


  • Marcelo Antônio Amaro Pinheiro UNESP/CLP
  • Tomas Roman de Toledo Profissional (Biólogo) recém-formado



Crab, Genotoxicity, Public Dump, Mangrove, Micronuclei, Pollution.


In the seventies, the region known as Baixada Santista was a large repository of environmental contamination mainly resulting from industrial waste. In effect, the contaminated residues came from different toxic substances including chemical, biochemical and others. Industrial waste was dumped or even stored in inadequate fragile ecological sites without any previous treatment and it resulted in significant amounts of air, soil and water pollution. A male specimen of U. cordatus presenting a malformation of the pollex (immovable finger) of its major claw (left) was captured in São Vicente city, raising concern to the local press and community. The immovable finger of the propodus segment in the claw of this specimen was modified into a structure in the form of a talon. This structure resembling an avian claw was comprised of five fixed ends united at the base. This might be a result from an injury of the original corpus structure while in a confrontation with another specimen. The newly found sample showed a high incidence of micronucleated cells in the haemolymph, approximately three times higher than normally reported. Perhaps this suggests the effect of an environmental influence in the morphology of the organism, most likely linked to the several sources of pollution in the region (public dump of Alemoa/Sambaiatuba, and the industrial conglomerate of Cubatão). We propose that similar measurements could be used in the estuarine area to assess and evaluate ecological risks and adverse biological effects.

Biografia do Autor

Marcelo Antônio Amaro Pinheiro, UNESP/CLP

Professor Doutor desde 1995, lotado como docente da Universidade Estadual Paulista (UNESP) desde 1994, na FCAV/UNESP Jaboticabal. Desde 2004'solicitou transferência para o Campus Experimental do Litoral Paulista (CLP), onde atua como docente responsável pela disciplina de Zoologia dos Invertebrados e Bentologia, bem como pesquisador atuante na linha de pesquisa "Biologia e Ecologia de Crustáceos Decápodos de Importância Econômica". É parecerista de vários periódicos no Brasil e Exterior, entre os quais: Journal of Crustacean Bology, Hydrobiologia, Marine Biology, Marine Biology Research, The Open Marine Biology Journal, Journal of Experimental Marine Biology and Ecology, Revista Brasileira de Zoologia, Nauplius, entre outras.

Tomas Roman de Toledo, Profissional (Biólogo) recém-formado

Profissional (Biólogo) recém-formado






Nota Breve