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Table 3 Measurements [in μm] and pt values of selected morphological structures of animals of Richtersius coronifer s.s. (Richters, 1903) from the Billefjorden population. (Specimens mounted in Hoyer’s medium; N – number of specimens/structures measured, RANGE refers to the smallest and the largest structure among all measured specimens; SD – standard deviation; * – proposed new neotype)

From: A new redescription of Richtersius coronifer, supported by transcriptome, provides resources for describing concealed species diversity within the monotypic genus Richtersius (Eutardigrada)

Character

N

Range

Mean

SD

Neotype*

μm

pt

μm

pt

μm

pt

μm

pt

Body length

30

499

1027

701

1125

771

898

164

117

984

1057

Buccopharyngeal tube

 Buccal tube length

30

68.5

100.5

 

 

85.2

10.0

93.1

 Stylet support insertion point

30

51.2

74.4

72.1

75.6

63.0

74.0

7.2

1.1

68.8

73.9

 Buccal tube external width

30

5.6

10.5

7.6

11.0

8.0

9.4

1.3

1.0

9.5

10.2

 Buccal tube internal width

30

1.2

3.5

1.7

3.8

1.9

2.3

0.4

0.5

1.9

2.0

 Ventral lamina length

30

32.0

47.6

40.1

51.3

39.3

46.2

4.8

3.0

43.3

46.5

Placoid lengths

 Macroplacoid 1

30

7.5

15.5

10.2

15.9

11.9

13.9

2.5

1.8

11.4

12.2

 Macroplacoid 2

30

6.2

11.5

8.7

12.6

8.9

10.4

1.5

1.1

10.1

10.8

 Macroplacoid row

30

14.8

28.5

20.8

31.3

22.2

25.9

3.7

2.5

22.9

24.6

Claw 1 heights

 External base

25

9.2

17.6

13.0

20.6

14.0

16.5

2.5

1.8

16.8

18.0

 External primary branch

25

20.9

31.4

27.4

36.7

26.3

31.2

3.0

2.4

28.7

30.9

 External secondary branch

24

12.1

25.4

16.9

30.9

17.7

20.8

3.6

3.0

22.1

23.7

 External base/primary branch (cct)

25

42.0

59.2

 

 

53.0

5.1

58.5

 Internal base

25

8.6

16.6

12.2

19.3

13.4

16.0

2.3

1.7

12.8

13.7

 Internal primary branch

26

20.8

30.8

25.2

36.5

26.6

31.5

2.5

2.6

26.1

28.0

 Internal secondary branch

25

10.7

21.5

14.7

25.9

16.0

19.0

3.2

2.7

?

?

 Internal base/primary branch (cct)

24

40.2

57.8

 

 

50.6

4.3

49.0

Claw 2 heights

 External base

25

9.6

19.0

13.6

20.9

14.5

16.9

2.7

1.8

15.4

16.5

 External primary branch

29

23.2

33.7

27.9

38.7

28.5

33.4

3.0

2.3

30.5

32.8

 External secondary branch

27

11.3

22.9

15.5

25.0

18.2

21.0

3.1

2.2

22.9

24.6

 External base/primary branch (cct)

25

40.7

58.2

 

 

51.0

5.5

50.5

 Internal base

26

9.0

18.2

12.7

21.3

14.6

16.9

2.5

1.7

15.6

16.8

 Internal primary branch

28

23.7

35.2

27.6

37.2

28.9

33.9

3.1

2.4

30.1

32.3

 Internal secondary branch

28

12.8

21.8

16.5

25.5

17.2

20.0

2.7

1.8

19.7

21.2

 Internal base/primary branch (cct)

26

38.0

57.6

 

 

49.9

5.4

51.8

Claw 3 heights

 External base

22

9.7

18.4

13.9

20.6

14.7

17.2

2.7

1.6

17.5

18.8

 External primary branch

25

24.0

40.7

30.3

41.2

29.1

34.5

4.4

2.8

31.4

33.7

 External secondary branch

23

12.0

23.1

17.5

25.3

18.4

21.6

3.6

2.4

22.1

23.7

 External base/primary branch (cct)

22

39.3

57.6

 

 

50.5

5.2

55.7

 Internal base

22

9.8

20.6

14.1

21.3

14.1

16.7

2.8

1.9

15.8

17.0

 Internal primary branch

22

22.6

42.4

30.6

42.9

28.8

34.4

4.4

2.9

31.2

33.5

 Internal secondary branch

22

11.5

29.2

15.7

31.7

16.9

20.0

4.1

3.3

19.6

21.1

 Internal base/primary branch (cct)

22

40.2

57.3

 

 

48.7

4.5

50.6

Claw 4 heights

 Anterior base

25

12.6

22.0

15.1

25.7

17.3

20.5

2.6

2.4

18.9

20.3

 Anterior primary branch

26

29.1

44.4

32.4

52.6

35.8

42.7

4.0

4.9

39.8

42.7

 Anterior secondary branch

25

13.6

28.0

19.5

35.9

20.5

24.3

3.8

3.7

23.3

25.0

 Anterior base/primary branch (cct)

24

41.3

54.5

 

 

47.6

3.6

47.5

 Posterior base

26

11.4

23.5

16.1

24.3

17.2

20.5

2.8

2.1

22.1

23.7

 Posterior primary branch

28

27.2

42.2

29.5

49.3

35.0

41.6

3.8

4.0

40.0

43.0

 Posterior secondary branch

27

12.8

27.3

18.1

29.1

20.0

23.6

4.0

3.1

25.9

27.8

 Posterior base/primary branch (cct)

26

41.1

56.8

 

 

48.7

4.5

55.3