Skip to main content

Advertisement

Table 6 Timing and order of canal segment enclosure (Stage III) and ossification (Stage IV)

From: Heterochrony, modularity, and the functional evolution of the mechanosensory lateral line canal system of fishes

   Enclosure (Stage III) Ossification (Stage IV)
Species Canal neuromast Mean fish size Min. canal diameter Mean fish size Min. canal diameter
Tramitichromis SO1 13.2 83.8 17.0 137.2
sp. SO2 9.8 86.7 14.0 105.8
  SO3 9.2 83.7 13.3 91.0
  SO4 8.3 100.4 12.0 95.9
  SO5 8.4 98.0 12.1 77.9
  MD1 --* N/A --** ---
  MD2 13.7 102.1 17.0 116.9
  MD3 11.8 101.5 13.4 89.7
  MD4 12.4 116.2 14.3 101.4
  MD5 14.5 130.0 15.0 149.7
Aulonocara SO1 17.3 186.6 18 231.4
stuartgranti SO2 15.8 143.0 18.7 225.7
  SO3 14.9 176.8 18.7 227.6
  SO4 11.3 100.4 15.1 120
  SO5 11.1 115.7 15.5 147.2
  MD1 17.3 217.8 --** ---
  MD2 15.0 113.9 19 212.8
  MD3 16.0 112.5 17.2 206.9
  MD4 16.5 166.6 18.5 203.6
  MD5 14.4 167.2 17.7 208.2
  1. Mean fish size and minimum canal diameter at which individual canal segments in the supraorbital (SO) and mandibular (MD) canals in Tramitichromis and Aulonocara were enclosed (Stage III) and ossified (Stage IV), as derived from histological material. See Figure 2 for definition of stages. Ascending values of mean fish size at enclosure and ossification among segments within a canal were used to infer the order of canal enclosure and ossification within that canal (see text for additional details). *Not enclosed; **Not ossified.