Table 5.
Comparative measurements of gastrocotylid Monogenea. Measurements are in micrometres unless otherwise stated and indicated as the range followed by the mean. Abbreviations: NSW=New South Wales.
| Source | Present study | Unnithan (1968) | Present study | Bouguerche et al. (2019) | Bouguerche et al. (2019) | Nasir and Fuentes Zambrano (1983) |
|---|---|---|---|---|---|---|
| Monogenea | Gastrocotyle kurra | G. kurra | Allogastrocotyle bivaginalis | A. bivaginalis | A. bivaginalis | A. bivaginalis |
| Hosts (Scientific name) | Scomber australasicus | Caranx kurra (Syn. now as Decapterus kurroides) | Scomber australasicus | Trachurus picturatus | Trachurus lathami | Trachurus lathami |
| Hosts (Common name) | Blue mackerel | Redtail scad | Blue mackerel | Blue jack mackerel | Rough scad | Rough scad |
| Locality | Off the coast of NSW, Australia | Trivandrum and near places, Kerala, India | Off the coast of NSW, Australia | Off Algeria, Mediterranean Sea | Off Venezuela, Atlantic | Off Venezuela, Western Atlantic |
| No. of specimens | Ten (n = 10) | Seven (n = 7) | Three (n = 3) | Thirty-three (n = 33) | Holotype | Two specimens measured |
| Total body length (mm) | 1.60–2.10 (1.84) | 1.50–2.87 | 2.05–3.00 (2.54) | 1.18–2.68 (2.03; n = 26) | 1.76 | 1.75–2.21 |
| Body width (mm) | 0.32–0.60 (0.40) | 0.45–0.64 | 0.38–0.45 (0.43) | 0.31–1.93 (0.48; n = 26) | 0.42 | 0.46–0.50 |
| Anterior narrow neck (mm) | 0.70–1.00 (0.86) | – | – | – | – | – |
| Haptor length | 750–1200 (990) | 1880 | 730–925 (801.67) | 310–1870 (1143; n = 26) | 945.00 | 945.00 |
| Terminal lappet | 100–160 (122) x 75–100 (84) | 225 × 135 | 500 (n = 1) | – | – | 100–130 |
| Oral sucker length | 30–40 (34.50) | – | 38–40 (38.67) | 20–40 (29; n = 28) | 20 | 16–26 |
| Oral sucker width | 20–32 (25.40) | – | 35–40 (36.67) | 15–50 (29; n = 28) | 20 | 18–22 |
| Pharynx length | 42–50 (45.80) | 40–44 | 33–43 (37) | 30–50 (38; n = 24) | 30 | 54 |
| Pharynx width | 33–46 (38.50) | – | 32–40 (35.33) | 20–52 (36; n = 24) | 27 | 58 |
| Clamps number | 18–27 (23) | 16–29 | 26–28 (27) | 23–36 (32 ± 3; n = 29) | 32 | 32–33 |
| Clamp length (large) | 63–85 (77.50) | 60 × 76 | 55–58 (56) | 37–68 (55 ± 7; n = 48) | 55 | 50–56 |
| Clamp width (large) | 55–76 (63.60) | – | 45–48 (46.67) | 31–68 (42 ± 6; n = 46) | 33 | 41–44 |
| Genital atrium length | 40–48 (42.70) | – | 45–50 (46.67) | 25–50 (38 ± 6; n = 30) | 37 | – |
| Genital atrium width | 29–38 (32.40) | – | 40–45 (42.67) | 25–50 (39 ± 5; n = 30) | 30 | – |
| Number of atrial hooks | 17–19 (18) | – | 11–13 (12) | 11–13 (12; n = 20) | 12 | 12 |
| Atrial hooks length (large) | 14–17 (15.30) | – | 17–20 (18.50) | 13–25 (21 ± 3; n = 41) | 30 | 17–20 |
| Atrial hooks length (small) | 5–7 (5.70) | – | 10–14 (11.67) | – | – | – |
| Large hamuli (proximal anchor) length | 45–55 (50.30) | 40–44 | 33–35 (34) | 24–32 (29; n = 20) | 33 | 30–34 |
| Small hamuli (middle anchor) length | 17–20 (18) | 16 | – | – | – | – |
| Distal anchor (marginal's) length | 25–30 (26.50) | 20 | 10–15 (12.33) | 9–13 (11; n = 19) | 13 | – |
| Distance genital atrium-anterior end | 150–275 (233.57) | – | 160–200 (174.33) | 125–310 (206; n = 27) | 160 | 134–216 |
| Egg length | 300 (n = 1) | 225 × 75 to 255 × 90 | – | – | – | 80 |
| Egg width | 80 (n = 1) | – | – | – | – | 28 |
| Anterior filament | 250 (n = 1) | 300–375 | – | – | – | – |
| Posterior filament | 150 (n = 1) | 285–375 | – | – | – | – |