Paraulopus, Sato & Nakabo, 2002

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 : 408-410

Paraulopus cf. brevirostris

(Figure 22)

1980 Chlorophthalmus brevirostris Rivaton J, Bourret P , pp. 226–227, plate 104, fig. 6–9

2013 Paraulopus brevirostris Nolf D , plate 54

Material: 1 specimen in total. Roxas (1) RGM 962326.

Otolith with an oblique-oval shape (OL:OH=1.69). The dorsal rim starts at the transition of ostium and cauda; it is rounded and displays several undulations. A posterior depression gives the impression of a posterior blunted angle just before the contact of dorsal and ventral rims. The ventral rim is smooth and displays its deepest point

PLATE 2

markedly to the anterior side. Its anterior part of is strongly curved, while the posterior part of it is rather straight. The inner surface is convex. The supramedian sulcus consists of a complex wedge-shaped ostium and a long narrow cauda that has a constant width and bends ventrally towards but does not reach the posterior rim. The characteristic ostium consists of a lower spatula-shaped part that is slightly directed in anterio-ventral direction and a flat dorsal extension that lies above it and is separated by a thin ridge, as visible in the SEM picture (Figure 22b). A shallow dorsal depression lies above the anterior part of the cauda. The outer surface is convex along the rims and flat in its middle with a shallow irregular dorso-central depression.

The dorsally extended ostium and overall shape suggests a close relationship to the extant Paraulopus brevirostris . We cannot exclude that it represents a juvenile specimen, in which the dorsal field may be less expanded as in adult specimens.