Table 8 Data on mature and pre-spent male individuals of Muusoctopus sibiricus (Løyning, 1930) [62]. Immature individuals are detailed in SM.01 Table S4. Both individuals are males

Area

LS

ESS

Maturity stage

Pre-spent

(V₃)

Mature

(V₂)

ML, mm

38

39

TL, mm

179

177

Ventral ML, mm

37

36

Mantle width, mm

40

35

Head length, mm

11

10

Head width, mm

30

22

Eye diameter, mm

8.0

9.0

Lens diameter, mm

2.0

2.4

Funnel length, mm

24.0

21.0

Free funnel

length, mm

11.0

11.0

Web depth, mm

(min – max)

26–38

26–44

Web formula

c > a = b > d > e

b > d > a = c > e

Arm length, mm

(min – max)

122–130

112–128

Arm formula

2 > 1 = 3 > 4

1 > 2 > 3 > 4

Sucker count

(min – max)

84–88

84–94

Normal sucker diameter

(max), mm

4.0

4.0

Enlarged suckers,

diameter (min – max), mm

and location

6.0–9.0;

7–12 pairs

5.0–8.0;

8–12 pairs

Gill length, mm

16

19.0

Gill lamellae count,

outer/inner

10/10

10/10

Gill lamellae count,

inner

10

10

Hectocotylized arm

length, mm

123

112

Hectocotylized arm

sucker count

60

64

Ligula length, mm

14.5

15.0

Ligula width, mm

3.5

3.0

Calamus length, mm

2.5

2.3

Number of spermatophores

52

49

Spermatophore length, mm

(min – max)

61.1–63.5

46.3–56.2