Figure 2 in Suction feeding preceded filtering in baleen whale evolution

Figure 2. Wear patterns on representative teeth of NMV P252567, suggesting suction feeding in an aetiocetid. A, left upper canine or first premolar; B, double-rooted postcanine 1; C,?lower double-rooted postcanine 2; D,?lower double-rooted postcanine 3; E, micro-computed tomography cross section of postcanine 1, showing the depth and rounded edges of the horizontal striations (marked by large black arrows). A–C are shown in lingual, labial and anterior/posterior view, D in lingual view only.图2。NMV P252567号标本代表性牙齿的磨损模式，表明该艾提欧鲸类（aetiocetid）具有抽吸摄食（suction feeding）的习性。A：左上颌犬齿或第一前臼齿；B：双根第1枚后齿；C：？下颌双根第2枚后齿；D：？下颌双根第3枚后齿；E：第1枚后齿的显微计算机断层扫描（micro-computed tomography）横截面，显示大型黑色箭头标注的水平条纹的深度与圆钝边缘。A~C分别以舌侧、唇侧以及前/后视角展示，D仅以舌侧视角展示。