Bigeye Houndshark

description

(Figs. 4 G, 16 D – G) The existence of undescribed diversity in the Iago omanensis (Norman) species complex from elsewhere across the globe (see Naylor et al. 2012 a) complicates identification of the specimens of this genus examined in Sri Lanka, six of which (SL- 79, SL- 80, SL- 81, SL- 82, SL- 83, and SL- 84) were collected at the Mutur landing site in the Eastern Province in 2018, and one of which (SL- 114) was collected at the Peliyagoda Fish Market in Colombo, in the Western Province. Based on morphology, we initially thought we had encountered two different species of Iago. In one case (i. e., SL- 80; Fig. 16 F), the second dorsal fin was only slightly larger than the anal fin, and the anal fin origin was located slightly anterior to the middle of the second dorsal fin with the anal fin posterior rear tip extending posterior to that of the second dorsal fin; this specimen has been deposited in the BRT Ichthyology Collection (BRT-I 0020). In contrast, in the other six specimens (SL- 79 [Fig. 16 D], SL- 81, SL- 82, SL- 83, SL- 84, and SL- 114), the second dorsal fin was conspicuously larger than the anal fin and the anal fin origin was only slightly posterior to the origin of

New insights into the identities of the elasmobranch fauna of Sri Lanka