Carassius cf. gibelio ( Bloch, 1782 )

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

Carassius cf. gibelio ( Bloch, 1782)

Fig. 10D .

Material and dimensions.—See Table 2.

Description.—The general shape can be best described as an irregular rhombohedron. The edges are pronounced; only the posteromedial edge may be absent or weakly developed.

The lapilli of C. cf. carassius ( Fig. 10A, B, F 1 ) are especially well characterised because of their rhomboheric symmetry and the distinct concavity in the middle of the medial margin.

Figures

Fig.10. Utricular otoliths (lapilli) of Recent Carassius. A–C, F. Carassius cf. carassius (Linnaeus, 1758) from wild catches in Germany. A–C. BSPG 2003 IV 48b, 47, 48a respectively, in dorsal (A, B) and ventral (C) views. F. BSPG 2003 IV 46 in dorsal (F1) and anterior (F2) views. All lapilli, except F2, are represented as right ones (A–C, F1 are mirrored); F2 is represented as left lapillus. A, C display a lapilli pair. D. Carassius cf. gibelio (Bloch, 1782) from a wild catch in Germany, BSPG 2003 IV 44, in dorsal (D1) and anterior (D2) views, represented as right lapillus. E. Carassius auratus (Linnaeus, 1758) from breeding station, BSPG 2003 IV 162, in dorsal view, represented as right lapillus (mirrored). SEM−pictures (B–F), digital photographs (A).

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).