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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).