Netuma thalassina

Johari, Adibah, Kocsis, László, Roslim, Amajida & Haziq, Ilman, 2025, Otolith morphometric analysis of North Bornean Ariidae (Siluriformes): new insights and taxonomic implications, Zootaxa 5660 (4), pp. 451-474 : 463

Netuma thalassina (n= 16) ( Fig. 6 , Supplementary data 7)

These otoliths share a majority of the N. bilineata otoliths’ features, including having prominent Amp, Mn, and shallow ILb. This makes the two Netuma species quite indistinguishable from each other. However here, some N. thalassina otoliths tend to have compact straight Sl (n= 5), and most of them have compact curved Sl (n= 11).

Figures

FIGURE 6. Left lapilli otolith of ariid taxa with elongated and rounded otolith. Lapillus 1 is elongated, and lapilli 2 to 6 are rounded. 1: Osteogeneiosus militaris; 2: Hexanematichthys sagor; 3: Netuma bilineata; 4: Netuma thalassina; 5: Plicofollis argyropleuron; 6: Plicofollis nella, a: Ventral view; b: Dorsal view; c: Mesial view, Scale bar: 1mm.