Cell position (tier) | Number of cells/row | Number of cilia/cell | Length of cilia (μm) | Arrangement of cilia |  |  |
---|---|---|---|---|---|---|
Apical | ? | 3 × (15-20)* | 40-50 | tuft |  |  |
Pretrochal 1 | 6-8 | numerous | 10-15 | scattered | Â | Â |
Pretrochal 2 | 8-10 | numerous | 10-15 | scattered | Â | Â |
Prototrochal | 14-16 | 6 × (20-25)* | 25-35 | adapical row |  |  |
Posttrochal 1 | 10-12 | numerous | 10-15 | scattered | Â | Â |
Posttrochal 2 | 12-14 | numerous | 10-15 | adapical row | Â | Â |
Posttrochal 3 | 2 | 30-40 | 10-15 | tuft | Â | Â |