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Table 1 Tooth and cusp numbers in the rostral and caudal regions of the mandible for different morphs of the Mexican tetra

From: Adaptive evolution of the lower jaw dentition in Mexican tetra (Astyanax mexicanus)

Group

SL (cm)

Total tooth number

Rostral cusp number

Caudal tooth number

Caudal cusp number

4 cusps

5 cusps

6 cusps

7 cusps

8 cusps

1 cusps

2 cusps

3 cusps

4 cusps

5 cusps

6 cusps

7 cusps

C-1

5.7

7

 

3

1

  

5

   

1

1

1

 

C-2

4.7

9

1

3

   

5

2

1

1

1

   

C-3

4.7

7

 

4

   

3

2

  

1

   

C-4

5.3

6

 

4

   

2

  

1

1

   

C-5

5.5

6

 

4

   

2

  

1

1

   

C-6

5.7

9

 

4

   

5

  

4

  

1

 

C-7

4.6

9

 

4

   

5

2

 

3

    

C-8

4.0

10

 

4

   

6

1

2

2

1

   

Average number of teeth

 

7.88 ± 1.55

     

3.88 ± 1.55

       

Average cusp/tooth

 

4.04

     

2.87

       

S-1

3.7

7

 

2

   

3

2

 

1

    

S-2

4.1

7

 

4

   

3

  

2

1

   

S-3

4.3

7

 

4

   

3

  

1

2

   

S-4

3.6

7

 

4

   

3

  

1

2

   

S-5

3.7

9

 

4

   

5

  

3

 

2

  

Average number of teeth

 

7.4 ± 0.89

     

3.4 ± 0.89

       

Average cusp/tooth

 

4.26

     

3.29

       

Non Sx-1

3.7

4

 

4

   

0

       

Non Sx-2

4.1

6

 

4

   

2

1

  

1

   

Non Sx-3

4.3

6

 

4

   

2

  

1

1

   

Non Sx-4

3.6

7

 

4

   

3

  

1

1

   

Non Sx-5

3.7

8

 

4

   

4

  

2

1

   

Average number of teeth

 

6.2 ± 1.48

     

2.2 ± 1.48

       

Average cusp/tooth

 

4.84

     

3.29

       

T-1

3.7

11

 

1

1

2

 

7

 

2

3

1

1

  

T-2

4.7

12

  

3

1

 

8

1

1

4

 

1

1

 

T-3

4.7

13

 

2

2

  

9

1

2

4

 

2

  

T-4

4.0

10

  

3

1

 

6

1

1

2

1

1

  

T-5

5.0

14

  

3

1

 

10

 

4

4

 

1

 

1

T-6

7.1

14

  

2

2

 

10

1

 

4

1

2

2

 

T-7

4.4

8

 

1

2

1

 

4

1

1

   

1

 

T-8

4.2

11

  

2

1

1

7

 

2

4

  

1

 

Average number of teeth

 

11.62 ± 2.06

     

7.62 ± 2.06

       

Average cusp/tooth

 

4.16

     

3.18

       

I-1

4.9

10

  

3

1

 

6

1

2

2

 

1

  

I-2

5.7

12

  

1

3

 

8

 

1

4

1

1

1

 

I-3

5.8

13

  

3

1

 

9

 

1

5

 

3

  

I-4

5.2

8

  

4

  

4

1

  

1

1

1

 

I-5

5.4

11

 

1

2

1

 

7

 

1

4

  

2

 

I-6

5.2

10

  

4

  

6

  

3

1

2

  

Average number of teeth

 

10.67 ± 1.75

     

6.67 ± 1.75

       

Average cusp/tooth

 

4.56

     

3.55

       
  1. C-1 to C-8, surface control fish; S-1 to S-5,surface surgery fish, surgery side; NonSx-1 to Non Sx-5, surface surgery fish non-surgery side; T-1 to T-8, Tinaja cavefish; I-1 to I-6, intermediates (F1 hybrids). The rostral teeth cusp number varies between four to eight cusps while the caudal teeth cusps number varies from one to seven cusps per tooth. Averages ± standard deviations are given. Standard Length (SL).
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