1. MARE-Marine and Environmental Sciences Centre, Department of Life Sciences; University of Coimbra; 3000-456 Coimbra Portugal
2. Nyctea Lda. - Serviços de Natureza e Ambiente Lda. Estrada da Luz - 161; Lisboa Portugal
3. Departament de Anatomy, Cell Biology and Zoology; University of Extremadura; Avenida de Elvas s/n 06071 Badajoz Spain