Ariosoma, Swainson, 1838

Van Hinsbergh, Victor W. M. & Helwerda, Renate A., 2019, Fish Otoliths from the Cabarruyan Piacenzian-Gelasian fauna found in the Philippines, Zootaxa 4563 (3), pp. 401-443 : 403

Ariosoma sp.

(Figure 1)

Material: 1 specimen in total. AndaDeVos (1) RGM 962092.

Description: One eroded right otolith (OL:OH=1.06) is available, which displays the general round shape and sulcus of Ariosoma . The ventral rim is rounded with the posterior part more strongly curved than the anterior part. The dorsal rim is divided in three almost straight parts separated by blunt mid-dorsal and postdorsal angles. The inner side is convex in both directions with a supramedian sulcus. The ostial part of the sulcus bends upwards towards the anterior-dorsal margin; the dorsal part is rather straight and runs to the posterior side, where it is somewhat widened. The outer surface is smooth and convex, but less than the inner side, and displays two slightly concave depressions at the pre- and postdorsal part.