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Table 2 Mitochondrial introgression across the flat periwinkle samples included in this study indicated as the number (and percentage) of individuals from one species carrying mitochondrial typical haplotypes from the other species. Codes are the same as in Table 1. Individuals were classified into species using morphology and nuclear markers except for those marked witha

From: Phylogeographic history of flat periwinkles, Littorina fabalis and L. obtusata

Locality

N COI + Cyt-b

Introgression

Code

(males/females)

N (%)

L. obtusata

 (1) oUS1a

10 (NA)

 

 (2) oUS2a

8 (NA)

 

 (3) oICa

10 (NA)

 

 (4) oSCa

9 (NA)

 

 (5) oNO1

15 (9/6)

 

 (6) oNO2

3 (1/2)

 

 (7) oSW1

12 (9/3)

 

 (8) oSW2

12 (10/2)

 

 (9) oWA1

12 (8/4)

1 (8%)

 (10) oWA2

9 (6/3)

4 (44%)

 (16) oSP3

34 (24/10)

 

 (17) oPT1

32 (24/8)

 

Total

166

5 (3%)

L. fabalis

 (3) fICa

3 (NA)

 

 (5) fNO1

12 (4/8)

6 (50%)

 (6) fNO2

8 (5/3)

4 (50%)

 (7) fSW1

11 (11/0)

8 (73%)

 (8) fSW2

11 (11/0)

11 (100%)

 (9) fWA1

9 (9/0)

 

 (10) fWA2

9 (9/0)

 

 (11) fIR

7 (7/0)

 

 (12) fEN

7 (7/0)

1 (14%)

 (13) fFR

8 (8/0)

 

 (14) fSP1

21 (14/7)

7 (33%)

 (15) fSP2

29 (22/7)

4 (14%)

 (18) fPT2

22 (10/12)

 

Total

157

41 (26%)

  1. aIndividuals from these sites were classified into species based on nuclear markers alone