Opisthoproctus grimaldii Zugmayer, 1911

(Figure 8)

1995 Opisthoproctus grimaldii Smale MJ, Watson G, Hecht T, p. 26, plate 10, fig. A1

1999 Opisthoproctus grimaldii Rivaton J, Bourret P, pp. 194–195, plate 88, fig. 7–8

2013b Opisthoproctus grimaldii Schwarzhans W, plate 2, fig. 11

2013 Opisthoproctus grimaldi Nolf D, plate 41

Material: 1 specimen in total. Roxas (1) RGM 962099.

One eroded otolith (OL:OH= 0.63) reflects the characteristics of the recent Opisthoproctus grimaldii well. The outer surface has thin short furrows perpendicular to the dorsal and ventral rims and a markedly elevated smoothened middle part.