Anatomical study on the pre branchial region of Sphyrna lewini (Griffith & Smith) and Rhizoprionodon lalandii (Valenciennes) (Elasmobranchii, Carcharhiniformes) related with the cephalofoil in Sphyrna Rafinesque. Revista Brasileira de Zoologia, 14(2), 347–370
DOI: 10.1590/S0101-81751997000200009
