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Balaenoptera acutorostrata Lacepede, 1804

J. G. Mead

Figure 20. Diagram of a 1-2 year old, young minke whale skull showing approximate positions of a series of transverse sections made with a saw, which are shown in Figures 21-26. Specimen D23-72 (USNM485832). Identification of fused regions were based on surface features and on disarticulated fetal specimens, shown in Figures 82-102. Figure 21. Transverse sections through a young minke whale skull at the locations indicated in Figure 20, at the anterior end of the rostrum. Individual sections are not precisely to the same scale. a) Dimensions not determined but to the same scale as b; b) 3 cm x 5 cm; c) 6cm x 10 cm; d) 15 cm x 7 cm. Figure 22. Transverse sections through a young minke whale skull at the locations indicated in Figure 20, in the middle of the rostrum. Individual sections are not precisely to the same scale. a) 19 cm x 9 cm; b) 22 cm x 9 cm; c) 26 cm x 9.5 cm. Figure 23. Transverse sections through a young minke whale skull at the locations indicated in Figure 20, through the narial region at the base of the rostrum. Individual sections are not precisely to the same scale. a) 28.5 cm x 13 cm; b) 33.5 cm x 16 cm. Figure 24. Transverse sections through a young minke whale skull at the locations indicated in Figure 20, through the anterior portions of the braincase. Individual sections are not precisely to the same scale. a) 51 cm x 21 cm; b) dimensions not determined. Figure 25. Transverse sections through a young minke whale skull at the locations indicated in Figure 20, through the vertex region, ethmoid region, and supraoccipital. Individual sections are not precisely to the same scale. a) 53 cm x 23 cm; b) 56 cm x 24 cm. Figure 26. Transverse section through a young minke whale skull at the location indicated in Figure 20, behind the vertex region. Dimensions are 59.5 cm x 23 cm.

Date

20 May 1972

Medium

Skull

Department

NMNHMAMMALS

Institution

NMNH - Vertebrate Zoology - Mammals Division

Object number

nmnhvz_7508474