Table 2.
Measurements (μm) of adult worms of the family Echinochasmidae
| S. amurensis sp. nov. (this study) | S. aylacostoma (Ostrowski de Núñez and Quintana, 2008) | S. chasanensis (Besprozvannykh et al., 2017) | E. suifunensis (Besprozvannykh, 1991; this study) | E. milvi (Besprozvannykh, 1989; this study) | |||
|---|---|---|---|---|---|---|---|
| Holotype | Range (n = 7) | Mean | Range | Range | Range | Range | |
| Body length | 2700 | 2320–2770 | 2510 | 1728–2256 | 2341–2464 | 790–970 | 493–740 |
| Body width | 250 | 250–350 | 280 | 208–256 | 493–585 | 185–277 | 169–280 |
| Bw/Bl (%)a | 9.3 | 9.3–14.1 | 11.2 | – | 20–25 | 21.5–32.1 | 33.2–43.8 |
| Forebody length | 430 | 410–510 | 450 | – | 554–631 | 330–554 | 173–204 |
| Fo/Bl (%)a | 15.9 | 15.9–19.8 | 17.9 | – | 23.7–25.6 | 38.3–58.0 | 34.0–39.1 |
| Oral sucker length | 61 | 56–84 | 70 | 60–88 | 116–123 | 33–45 | 31–54 |
| Oral sucker width | 61 | 61–89 | 72 | 63–82 | 116–123 | 42–56 | 31–54 |
| Ventral sucker length | 156 | 156–220 | 184 | 142–173 | 212–266 | 72–84 | 70–90 |
| Ventral sucker width | 156 | 156–280 | 195 | 158–180 | 262–293 | 78–85 | 70–90 |
| Suckers length ratio | 1:2.56 | 1:2.0–3.28 | 1:2.63 | – | 1:1.83–2.29 | 1:1.9–2.1 | 1:2.2–2.5 |
| Suckers width ratio | 1:2.56 | 1:1.86–3.73 | 1:2.71 | – | 1:2.26–2.46 | 1:1.7–1.9 | 1:2.2–2.6 |
| Head-collar width | 184 | 162–220 | 193 | – | 273–289 | 145–156 | 160 |
| Collar spines length | 42–50 | 42–50 | – | 23.7–37.9 | 42–50 | 22–39 | 17–23 |
| Prepharynx length | 17 | 17–56 | 39 | 0–47 | 39–54 | – | 31 |
| Pharynx length | 89 | 67–109 | 86 | 69–95 | 116–119 | 50–67 | 28–54 |
| Pharynx width | 61 | 61–101 | 79 | 63–85 | 96–100 | 39–56 | 28–54 |
| Oesophagus length | 168 | 127–210 | 164 | 161–221 | 166–212 | 190 | 70–78 |
| Ovary length | 89 | 61–89 | 75 | 54–95 | 104–112 | 56–60 | 48 |
| Ovary width | 89 | 84–145 | 100 | 79–117 | 112–139 | 70 | 50 |
| Anterior testis length | 250 | 168–250 | 207 | 117–189 | 250–296 | 67 | 81–92 |
| Anterior testis width | 150 | 127–250 | 170 | 139–189 | 223–277 | 123–127 | 140 |
| Posterior testis length | 250 | 178–300 | 231 | 123–261 | 312–331 | 60–70 | 81 |
| Posterior testis width | 140 | 112–250 | 154 | 139–176 | 231–254 | 110–140 | 110 |
| Cirrus-sac length | 127 | 112–190 | 137 | 120–176 | 254–262 | 100 | 87–89 |
| Cirrus-sac width | 67 | 61–84 | 77 | 95–113 | 119–135 | 45–67 | 56 |
| Post-testicular field length | 1060 | 870–1080 | 960 | – | 832–893 | 173–190 | 58–116 |
| Pt/Bl (%)a | 39.3 | 36.7–39.3 | 38.2 | – | 35.5–37.6 | 19.6–22.0 | 11.4–22.1 |
| Eggs length | 84–89 | 84–95 | – | 88–104 | 81–92 | 78 | 78–100 |
| Eggs width | 61 | 56–67 | – | 35–60 | 50–54 | 45 | 45 |
a
Bw/Bl, body width as a percentage of body length; Fo/Bl, length of the forebody as a percentage of body length; Pt/Bl, post-testicular field length as a percentage of body length.