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Table 1.

Morphometric comparisons among species of Pararhadinorhynchus.

P. mugilis P. coorongenis P. magnus n. sp.
Characters Johnston & Edmunds [22]
Edmunds [15]
This paper
Males Females Males Females Male Females
Trunk size (mm) 3.1–11.4 × 0.23–0.61 3.9–19.2 × 0.22–0.69 7.0–11.0 × 0.40–0.70 9.0–15.0 × 0.45–0.55 22.50–43.75 (35.22) × 0.60–1.20 (0.93) 57.00–71.25 (63.17) × 0.77–1.37 (1.14)
Proboscis size 900 × 200 900 × 200 500–580 × 0.12–0.23 510–520 × 0.15–0.22 648–950 (840) × 95–130 (108) 915–1170 (1025) × 100–125 (112)
Hook rows/per row 18/16–17 18/16–17 14–16 (16)/8–10 (9) 14–16 (16)/8–10 (9) 15–16 (15.25)/22–25 (24.50) 14–16 (15.25)/24–27 (25.50)
Longest & smallest hooks 21 & 5 (Fig. 11) 21 & 5 (Fig. 11) 50 & 25 (Fig. 2) 50 & 25 (Fig. 2) ——– 35 & 22
Hook roots Shorter than blades, post. hooks rootless Shorter than blades, post. hooks rootless As long as blades, post. 4 hook rootless As long as blades, post. 4 hook rootless As long as blades, reduced posteriorly As long as blades, reduced posteriorly
Neck size 0.15–0.25 × ——– 0.15–0.25 × ——– 150 × ——– 150 × ——– 166–208 (192) × 166–260 (246) 187–208 (198) × 229–239 (232)
Receptacle size (mm) 0.61–1.3 × 0.12–0.20 0.61–1.3 × 0.12–0.20 0.6–0.8 × 0.18–0.26 0.6–0.8 × 0.18–0.26 1.30–2.18 (1.86) × 0.16–0.25 (0.21) 1.40–2.25 (1.91) × 0.19–0.24 (0.21)
Cephalic ganglion size ——– ——– ——– ——– 187–260 (213) × 20–78 (58) 230–364 (299) × 73–83 (78)
Lemnisci size (mm) 0.80 × ——– (as long as recept.) 0.80 × ——– (as long as recept.) Twice as long as receptacle Twice as long as receptacle Twice or same as long as receptacle Twice or same as long as receptacle
Ant. testis size (mm) 0.28–1.1 × 0.08–0.24 N/A 0.45–1.05 × 0.35–0.45 N/A 1.12–2.20 (1.82) × 0.62–1.07 (0.91) N/A
Post. Testis size (mm) 0.27–1.1 × 0.08–0.23 N/A 0.50–0.9 × 0.34–0.43N/A 1.25–2.25 (1.89) × 0.57–0.87 (0.75) N/A
Cement gland size (mm) 0.45–2.5 × ——– N/A 2, long & slender N/A 4.25–10.62 (7.52) × 0.17–0.25 (0.22) and 0.25–0.37 (0.32) N/A
Cement gl. Duct size (mm) ——– N/A ——– N/A 1.07–1.75 (1.36) × 0.11–0.18 (0.14) N/A
Safftigen’s pouch size (mm) ——– N/A ——– N/A 1.04–1.62 (1.27) × 0.26–0.37 (0.30) N/A
Bursa size (mm) ——– N/A ——– N/A 0.75–0.87 (0.81) × 1.00 N/A
Fem. reproductive syst. N/A ——– N/A 2.8–3.4 N/A 1.60–1.72 (1.66)
Vagina length N/A 150 (ganglionic complex ?) N/A ——– N/A 0.19–0.21 (0.20)
Uterus length (mm) ——– 1.1–1.4 N/A ——– N/A 0.88–1.09 (0.99)
Uterine bell length N/A 200 N/A ——– N/A 260–340 (300)
Uterus glands area length N/A ——– N/A ——– N/A 0.21–0.27 (0.24)
Egg size N/A 52–62 × 13–18 N/A 42–46 × 8–10 N/A 52–65 × 15–18
Gonopore Terminal Terminal Terminal Terminal Terminal Subterminal
Host Mugil cephalus Mugil cephalus Aldrichetta forsteri Aldrichetta forsteri Scatophagus argus Scatophagus argus
Geography Australia Australia Australia Australia Vietnam Vietnam

Range (mean) measurements are in micrometers unless otherwise specified.

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