Open Access
Table 2
The relationship between host species and size of certain anatomical structures of measured specimens of Rhadinorhynchus laterospinosus collected off the Pacific coast of Vietnam in 2016.
| Worm sex | Character | Host species |
|||
|---|---|---|---|---|---|
| Auxis thazard (n = 12 males, 15 females) | Auxis rochei (n = 18 males, 18 females) | ||||
| Male | Trunk length (mm) | 5.75–11.25 (8.09) | 4.75–8.37 (6.33) | ||
| Female | Trunk length (mm) | 7.80–26.25 (16.01) | 8.00–21.25 (13.16) | ||
| Male | No. ant. trunk spines in row (dorsal, mid, vent.)* | 1–3 (2), 2–4 (3), 1–2 (2) | 1–3 (2), 2–4 (3), 1–2 (2) | ||
| Female | No. ant. trunk spines in row (dorsal, mid, vent.) | 1–4 (2), 1–4 (3), 2–4 (3) | 2–4 (3), 3–5 (4), 2–5 (3) | ||
| Male | No. post. trunk spines in row (vent., lateral) | 1–4 (3), 5–12 (8) | 0–8 (3), 2–23 (9) | ||
| Female | No. post. trunk spines in row (vent., lateral) | 0–13 (6), 1–19 (11) | 5–16 (10), 5–31 (17) | ||
| Male | L of ant. trunk spines (dorsal, mid, vent.) | 42–62 (50), 31–42 (36), 21–63 (42) | 31–73 (51), 31–52 (43), 31–62 (46) | ||
| Female | L of ant. trunk spines (dorsal, mid, vent.) | 52–86 (64), 42–73 (54), 51–62 (56) | 48–72 (60), 31–62 (48), 46–61 (53) | ||
| Male | L of ventral post. trunk spines (ant., mid, post.) | 40–62 (50), 42–66 (52), 20–42 (37) | 32–73 (54), 51–83 (63), 40–72 (64) | ||
| Female | L of ventral post. trunk spines (ant., mid, post.) | 42–81 (63), 62–96 (79), 42–73 (59) | 52–84 (64), 61–95 (78), 51–95 (67) | ||
| Male | L of lateral post. trunk spines (ant., mid, post.) | 22–32 (29), 31–52 (44), 31–43 (37) | 41–52 (40), 40–72 (47), 30–62 (40) | ||
| Female | L of lateral post. trunk spines (ant., mid, post.) | 31–72 (57), 63–86 (65), 42–70 (54) | 41–73 (52), 62–82 (68), 41–73 (55) | ||
| Female | Proboscis length (mm) | 1.25–1.82 (1.55) | 1.45–1.90 (1.71) | ||
| Proboscis hook rows | 15–17 (16.4) | 15–19 (17.3) | |||
| Hook length |
Dorsal |
Ventral |
Dorsal |
Ventral |
|
| Male | Apical prob. hook L | 37–40 (39) × 7–10 (9) | 42–50 (46) × 11–12 (12) | 35–47 (39) × 7–11 (10) | 37–50 (44) × 11–12 (11) |
| Male | Subapical prob. hook L × W | 45–55 (51) × 10–15 (12) | 52–62 (58) × 12–17 (15) | 42–60 (53) × 10–12 (12) | 47–63 (55) × 12–15 (13) |
| Male | Mid prob. hook L × W | 55–60 (58) × 12–14 (13) | 60–67 (65) × 14–18 (16) | 52–62 (59) × 12 | 60–77 (67) × 13–18 (15) |
| Male | Post. prob. hook L × W | 35–37 (36) × 8–11 (10) | 37–47 (42) × 11–13 (12) | 27–42 (35) × 7–10 (8) | 35–50 (41) × 9–12 (11) |
| Male | Basal prob. hook L × W | 50–60 (53) × 11–15 (13) | 56–72 (62) × 13–17 (15) | 47–55 (51) × 10–14 (11) | 55–72 (63) × 12–17 (14) |
| Female | Apical prob. hook L × W | 50–60 (54) × 10–12 (11) | 52–65 (59) × 11–15 (13) | 45–52 (48) × 10–15 (12) | 45–60 (53) × 12–15 (14) |
| Female | Subapical prob. hook L × W | 60–65 (62) × 13–17 (15) | 63–70 (66) × 15–17 (17) | 62–72 (65) × 12–20 (15) | 60–70 (66) × 14–20 (16) |
| Female | Mid prob. hook L × W | 70–77 (73) × 13–17 (15) | 73–80 (77) × 20–22 (21) | 70–77 (73) × 12–15 (14) | 75–78 (76) × 18–20 (19) |
| Female | Post. prob. hook L × W | 40–45 (42) × 10–11 (10) | 42–50 (48) × 10–15 (12) | 32–45 (40) × 10–12 (11) | 50–57 (54) × 10–15 (13) |
| Female | Basal prob. hook L × W | 65–72 (68) × 10–15 (12) | 72–82 (75) × 15–17 (16) | 57–82 (68) × 12–17 (14) | 75–87 (79) × 12–18 (16) |
| Male | Prob. Recept. L × W (mm) | 2.08–3.45 (2.45) × 0.14–0.35 (0.25) | 1.62–2.62 (2.28) × 0.15–0.30 (0.21) | ||
| Male | Anterior testis (mm) | 0.69–1.62 (1.19) × 0.31–0.50 (0.40) | 0.59–1.75 (0.98) × 0.22–0.52 (0.35) | ||
| Male | Posterior testis (mm) | 0.52–1.25 (0.99) × 0.25–0.57 (0.42) | 0.47–1.50 (0.84) × 0.22–0.47 (0.33) | ||
| Male | Ant. cement glands (mm) | 0.78–1.04 (0.95) × 0.17–0.32 (0.24) | 0.31–1.09 (0.64) × 0.10–0.27 (0.18) | ||
| Male | Post. cement glands (mm) | 0.78–1.25 (1.05) × 0.17–0.26 (0.21) | 0.36–1.09 (0.62) × 0.14–0.26 (0.16) | ||
| Male | Saefftigen’s pouch (mm) | 0.83–1.27 (1.08) × 0.18–0.27 (0.22) | 0.42–1.00 (0.78) × 0.15–0.26 (0.20) | ||
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