Marshall, A.D., Pierce, S.J. and Bennett, M.B. 2008. Morphological measurements of manta rays (Manta birostris) with a description of a foetus from the east coast of Southern Africa. Zootaxa. 1717, 1 (Mar. 2008), 24–30. DOI:https://doi.org/10.11646/zootaxa.1717.1.2.