Genus Pastinachus

The current study confirmed two Pastinachus ater (Figure 7) specimens in Bangladesh and 18 specimens of Pastinachus solocirostris (Figure 8). It is assumed that, P. ater has been previously reported from Bangladesh as P. sephen (Roy et al. 2015), though a recent taxonomic study found that P. sephen is only found in the Western Indian Ocean (Red Sea to Pakistan) (Last & Manjaji-Matsumoto 2010). However, four specimens were morphologically very close to P. sephen and referred to as P. cf. sephen (Figure 9) needing further taxonomic work. We also recorded two specimens of a third species of Pastinachus, which are morphologically consistent with P. gracilicaudus . Further taxonomic examination is required, however, as differences were found between the NADH2 sequences of the Bangladesh as compared to Borneo specimens. This species is tentatively referred to as Pastinachus cf. gracilicaudus (Figure 10).