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Table 1 Diagnosis traits comparison chart (modified from Hinojosa et al., 2016) between the sighted individual, M. birostris, M. alfredi, and the putative additional species off Yucatán (Hinojosa et al., 2016). Present: 1; absent: 0

From: Southernmost record of the Giant Manta Ray Mobula birostris (Walbaum, 1792) in the Eastern Pacific

Visible diagnosis traits Sighted Mobula sp M. birostris M. alfredi Yucatán manta ray
Mouth color (white:0; black:1) 1 1 0 0; 1
Black dorsal surface 1 1 1 1; brown
Triangular-shaped shoulder patches in supra-branchial region (Unless melanistic form) melanistic 1; melanistic 0 1; melanistic
Dark spots between the five gill slits or pectoral fins 0 0 1 0
Calcified mass with an embedded spine on the dorsum of tail immediately posterior to dorsal fin 1 1 0 1