Hexanematichthys sagor

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 : 462

Hexanematichthys sagor (n= 14) ( Fig. 6 , Supplementary data 7)

Except for the antero-mesial margin of these otoliths, the mesial, posterior, and distal margins are well-rounded and convex. This results in a wide distal area and distal margin, and overall, makes the otoliths look circular shaped. They have wide Msd, and prominent Amp, and most (n= 8) show tubular curved Sl, while others (n= 6) have compact curved Sl. Their Mn is very prominent, and they have deeply bent ILb.

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.