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Table 1 Size ranges of the cnidae of Iosactis antarctica sp. nov. and I. vagabunda (data for I. vagabunda from Riemnn-Zürneck, 1997)

From: Another bipolar deep-sea anemone: new species of Iosactis (Actiniaria, Endomyaria) from Antarctica

Categories

Range of length and width of capsules (μm) I. antarctica sp. nov.

\( \bar{\rm X} \pm {\text{SD}} \)

S

N

F

Range of length and width of capsules (μm) I. vagabunda

PEDAL DISC

 Robust spirocysts

(23.0–44.0) × (7.0–10.0)

37.6 ± 4.2 × 8.1 ± 0.6

4/4

45

+/++

(27–33) × (7–8.5)

 Basitrichs 1

(13.0–16.0) × (3.0–4.0)

14.7 ± 1.0 × 3.0 ± 0.2*

4/4

23

−−−/+++

(11–12) × (2.5–3)

 Basitrichs 2

(25.0–35.0) × (3.0–5.0)

28.8 ± 2.2 × 4.0 ± 0.2

4/4

71

++/+++

(21–26) × (3.5–4)

SCAPUS

 Basitrichs 1

(13.4–19.3) × (2.8–4.1)

16.4 ± 1.3 × 3.3 ± 0.4

4/4

68

++/+++

(10.5–13.0) × (2.5–3)

 Basitrichs 2

(29.0–40.0) × (4.0–5.7)

35.4 ± 2.2 × 4.5 ± 0.4

4/4

62

+/+++

(23.5–30.0) × (3.5–4.5)

TENTACLES

 Basitrichs 1

(19.0–31.0) × (3.0–4.4)

22.9 ± 3.2 × 3.3 ± 0.5*

3/3

36

+/++

(19–25) × (3–3.5)

 Basitrichs 2

(44.0–55.0) × (4.0–5.0)

48.7 ± 2.5 × 4.7 ± 0.5

2/3

40

++/+++

(39–45) × (3.5–4.5)

ACTINOPHARYNX

 Basitrichs 1

(17.0–29.0) × (2.7–4.0)

22.3 ± 2.8 × 3.4 ± 0.5

4/4

62

+/+++

(13.5–26) × (3–3.5)

 Basitrichs 2

(39.0–57.0) × (4.0–5.0)

47.0 ± 3.9 × 4.8 ± 0.4

4/4

69

++/+++

(33–43) × (4–4.5)

FILAMENTS

 Basitrichs

(17.0–32.0) × (3.0–5.0)

25.8 ± 2.7 × 3.6 ± 0.5

4/4

66

+++

(15–22) × (3)

 M b-mastigophores

(31.0–45.0) × (5.6–7.0)

40.3 ± 3.6 × 6.1 ± 0.3*

4/4

32

+/+++

(33–40) × (5–6)

 M p-mastigophores

(29.0–41.0) × (4.0–7.0)

36.6 ± 3.0 × 5.8 ± 0.7*

4/4

37

+/++

(30–35) × (4.5–6)

  1. \( \bar{\rm X} \) mean length by mean width of capsules. SD standard deviation. S ratio of number of specimens in which each cnidae was found to number of specimens examined. N total number of capsules measured. F frequency, +++ = very common, ++ = common, + = rather common, −−− = sporadic. M Microbasic. Mean values marked with an asterisk are based on fewer than 40 capsules. Values from pooled samples of similar sizes