Chondrostoma nasus ( Linnaeus, 1758 )

Schulz-Mirbach, Tanja & Reichenbacher, Bettina, 2006, Reconstruction of Oligocene and Neogene freshwater fish faunas-an actualistic study on cypriniform otoliths, Acta Palaeontologica Polonica 51 (2), pp. 283-304 : 292

Chondrostoma nasus ( Linnaeus, 1758)

Fig. 11 .

Material and dimensions.—See Table 2.

Description.—The general shape is wide−ovate. It is rounded like a semicircle in the anterior portion and more or less trapezoid in the posterior part. The edges are rounded and distinctly visible. The medial and lateral margins are nearly straight or slightly convex and crenulated. The posterior margin is crenulated and may display a distinct concavity (e.g., Fig. 11A 1 ).

Figures

Fig. 11. Utricular otoliths (lapilli) of Recent Chondrostoma nasus (Linnaeus, 1758) from wild catches in Germany. A. BSPG 2003 IV 50 in dorsal (A1) and anterior (A2) views. C. BSPG 2003 IV 49 in dorsal view. Both represented as right lapilli (C mirrored). B. BSPG 2003 IV 51 in ventral view, represented as left lapillus. SEM−pictures (A, B), digital picture (C).

Fig. 1. Position and morphology of the otoliths in the head of a carp. A. Computer tomography (CT) of Recent Cyprinus carpio (Linnaeus, 1758) (BSPG 2003 IV 143) and its lapilli; 150 layers of frontal sections were carried out from the dorsal to the ventral side of the head. 3D reconstruction of the head with the position of the otoliths projected (A1), frontal section (layer 36), showing the position of lapillus and asteriscus (A2), and frontal section (layer 38), showing the position of sagitta and asteriscus (A3); right (A4) and left (A5) lapillus in dorsal views (A4 and A5 are digital photographs). B. Digital pictures of the otoliths of Recent Cyprinus carpio (Linnaeus, 1758): lapillus in dorsal view (B1), asteriscus in medial view (B2), and sagitta in medial view (B3) (posterior tip incomplete). Otoliths are represented as right ones (BSPG 2003 IV 156b, d, and e respectively).