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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.
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