1. Benthic Ecology Laboratory, U.E. Penedo, Campus Arapiraca, UFAL, Arapiraca, AL 57309-005, Brazil
2. Marine Science Laboratory, University of Southern Santa Catarina UNISUL, Tubarão, SC 88704-900, Brazil
3. Zoology Department, CB-UFPE, Recife, PE 50670-901, Brazil
4. Meiofauna Laboratory, UFCG, Campina Grande, PB 58428-830, Brazil