Triakidae, J.E.Gray, 1851

Haque, Alifa Bintha, White, William T., Cavanagh, Rachel D., Biswas, Aparna Riti & Hossain, Nazia, 2021, New records of elasmobranchs in the Bay of Bengal, Bangladesh: further taxonomic research is essential, Zootaxa 5027 (2), pp. 211-230 : 226

Family Triakidae

Three houndshark species have been previously recorded from Bangladesh, i.e. Mustelus manazo , M. mosis and Iago garricki ( Hoq et al. 2011; Habib et al. 2020).A total of 31 specimens of a second species of the Iago omanensis complex (which includes the poorly defined I. mangalorensis , if considered valid ( Sen et al. 2020; Weigmann 2016; Maduna & Bester-van der Merwe 2017)) were recorded in this study. There is a possibility the recorded Iago sp. could be a new species to science as two separate species ( Iago sp. A and Iago sp. B ) have been theorised to be present in the Indian waters ( Bineesh et al. 2017). This species is tentatively identified as Iago cf. omanensis ( Figure 18 ) pending further taxonomic investigation. It brings the total number of triakid species in Bangladesh to four, with the taxonomy of the Mustelus species in this region being investigated by one of the authors (WW).

Figures

FIGURE 18. Dorsal and ventral and head region image of Iago cf. omanensis from Cox’s Bazar (Female, TL= ~33 cm).