Fig. 16. Spintherobolus papilliferum, MZUSP 49408 in Systematics of Spintherobolus (Teleostei: Characidae: Cheirodontinae) from eastern Brazil

Fig. 16. Spintherobolus papilliferum, MZUSP 49408, adult female, 50.4 mm SL. Area of the anterior and posterior pseudotympanums of left side, anterior is to the right. The skin and scales were removed, exposing the muscles of the lateral body wall, pleural ribs of the fifth and sixth vertebrae (first and second pleural ribs), and the black, pigmented wall of the swimbladder. The larger black area to the left represents the pseudotympanum present in all cheirodontines. The somewhat obscured apical black area in the right upper part of the photograph is the area of the anterior pseudotympanum characteristic of the species of Spintherobolus. However, in adult S. papilliferus the anterior pseudotympanum is, in part, obscured by muscle tissue.