Table 1 Abbreviations, geographical position, country of origin and MOTU of the 67 Radix locations sampled, number of individuals scored for COI, ITS-1 sequence variation and shell shape and whether data on the habitat structure for the site was available.

Umea

63.845

20.259

Schweden

4

6

2

Flensburg

54.699

9.505

Germany

1

7

X

2

Eggebek

54.614

9.372

Germany

1

-

2

Groβ Buchwald

54.172

10.073

Germany

1

-

2

Kühlungsborn

54.149

11.725

Germany

3

12

X

2

Riedensee

54.149

11.689

Germany

2

24

X

2

Bad Doberan

54.075

11.936

Germany

2

32

X

2

Lesno

53.945

17.718

Poland

1

8

X

6

Mistorf

53.884

12.175

Germany

3

4

X

2

Tressower See

53.851

11.323

Germany

4

4

X

4

Kosewo

53.834

21.382

Poland

1

3

X

1

Dywity

53.818

20.477

Poland

2

5

X

1

Klusy

53.803

22.120

Poland

2

7

X

1

River Jegrznia

53.730

22.706

Poland

1

-

6

Lake Rajgrodzkie

53.730

22.619

Poland

1

7

X

1

Roggeliner See

53.729

10.940

Germany

3

5

X

2

Czarne

53.682

16.925

Poland

2

-

2

Lake Drawsko

53.567

16.22

Poland

1

3

X

4

Czechowizna

53.333

22.886

Poland

1

7

1

Kierzkow

52.996

14.811

Poland

1

-

4

Osno, River Lenka

52.454

14.871

Poland

3

4

X

1

Bialobrzegi

51.650

20.962

Poland

2

3

X

6

Sömmerda

51.236

10.977

Germany

3

-

2

Sülze

51.087

11.625

Germany

3

49

X

2

Suchedniow

51.072

20.846

Poland

2

8

X

1

Oberurff

51.036

9.161

Germany

3

24

X

4

Maarfelder Maar

50.101

6.758

Germany

5

-

4

Steinrodsee

49.992

8.6

Germany

2

14

X

4

Groβ Gerau

49.935

8.479

Germany

3

9

X

2

Stuttgart-Mühlhausen

48.838

9.229

Germany

1

8

X

5

Glomel

48.225

-3.404

France

1

8

4

Glomel

48.225

-3.404

France

3

14

2

Rennes

48.106

-1.705

France

3

17

4

Bodensee

47.709

9.051

Germany

7

-

1

Bodensee

47.667

9.213

Germany

11

-

2

Bodensee

47.667

9.213

Germany

4

-

4

Estavayer-le-Lac

46.856

6.840

Switzerland

5

20

X

2

Bihar

46.747

22.210

Romania

1

-

4

Barrage des Rossens

46.720

7.109

Switzerland

6

24

X

2

Les Auges

46.615

7.181

Switzerland

6

6

25

X

2

Grandvillard

46.555

7.072

Switzerland

4

1

120

X

2

Grandvillard

46.554

7.074

Switzerland

3

2

-

2

Les Lys

46.502

6.989

Switzerland

3

2

13

X

5

Montbovon

46.492

7.047

Switzerland

3

11

X

2

Muraszemenye

46.478

16.609

Hungary

1

-

1

Lac de Hongrin

46.419

7.072

Switzerland

3

3

30

X

5

Villeneuve

46.399

6.890

Switzerland

6

6

19

X

1

Rennaz

46.385

6.895

Switzerland

2

2

27

X

2

Les Roches

46.364

6.938

Switzerland

2

24

X

2

Lac de Retaud

46.363

7.194

Switzerland

5

5

42

X

5

River Vegre

46.150

-0.226

France

3

3

X

2

Laval

45.830

4.804

France

4

38

2

Herbasse

45.117

4.974

France

2

18

2

Herbasse

45.117

4.974

France

2

18

4

Cazevielle

43.769

3.798

France

2

16

2

St. Laurent de la Cabrierisse

43.070

2.720

France

2

32

X

3

Argeles sur Mer

42.564

2.902

France

3

2

3

Rwan Lxjuka à Ljuka

42.541

18.374

Croatia

3

55

5

39.947

20.091

Albania

1

3

4