Open Access
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 |
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