Comparative morphometric traits differentiation and phenotypic correlations between Achatina achatina (Linne, 1758) and Achatina fulica (Bowdich, 1822) snails with four and five whorls Journal title: Journal of Animal Science and Veterinary Medicine Authors: B. Okon, L. A Ibom, A. Halilu, P. O. Onwuka Subject(s):