Table 1 Morphological measurements (mean ± 1 standard deviation followed by the range in parentheses) of Gyrodactylus salinae n. sp. from Aphanius fasciatus (Valenciennes) collected from Cervia Saline, Italy, compared with those of Gyrodactylus rugiensoides Huyse et Volckaert, 2002 from Pomatoschistus minutus (Pallas) collected from Texel, The Netherlands (paratypes acc. nos. BMNH 2002.2.14.2-3)
Variable | Gyrodactylus salinae n. sp. (n = 15) | Gyrodactylus rugiensoides Huyse et Volckaert, 2002 (n = 2) |
|---|---|---|
Total body length | 447 ± 63.3 (375-575) | 787.5 (700-875) |
Total body width | 116 ± 26.7 (88-163) | 159 (155-162.5) |
Opisthaptor length × width | 75 ± 8.9 (60-88) × 80 ± 5.7 (70-88) | 112.5 (110-115) × 147.5 (145-150) |
Anterior pharynx bulb length × width | 18.8 ± 3.1 (15.0-24.5) × 22.1 ± 2.4 (19.5-27.2) | 32.9 (30.1-35.7) × 48.3 (46.8-49.7) |
Posterior pharynx bulb length × width | 8.1 ± 0.7 (6.6-8.8) × 24.6 ± 2.4 (21.8-29.0) | 34.1 (27.7-40.5) × 78.4 (76.5-80.4) |
MCO length × width | 14.4 ± 2.1 (11.9-18.5) × 12.7 ± 2.7 (10.1-17.6)1 | 14.8 (13.6-15.9) × 15.1 (14.0-16.1) |
Hamulus (H) | Â | Â |
H aperture | 17.9 ± 0.8 (17.0-19.6) | 18.0 (17.5-18.5) |
H proximal shaft width | 7.0 ± 0.6 (6.3-8.1) | 8.1 (7.6-8.6) |
H point length | 24.8 ± 0.5 (23.9-25.9) | 29.9 (29.3-30.5) |
H distal shaft width | 4.1 ± 0.4 (3.2-4.6) | 5.4 (5.3-5.4) |
H shaft length | 31.9 ± 2.9 (28.2-37.3) | 33.8 (33.5-34.2) |
H inner curve length | 3.8 ± 0.6 (2.3-4.6) | 3.9 (3.5-4.3) |
H aperture angle (°) | 36.6 ± 1.2 (33.8-37.9) | 32.5 (30.7-34.4) |
H point curve angle (°) | 12.2 ± 2.3 (7.4-15.4) | 10.1 (9.4-10.7) |
Inner H aperture angle (°) | 41.4 ± 1.3 (39.2-43.5) | 38.5 (36.4-40.7) |
H root length | 16.8 ± 0.9 (14.7-18.3) | 19.4 (19.2-19.7) |
H total length | 51.7 ± 1.6 (48.7-54.6) | 58.1 (57.9-58.2) |
Dorsal bar (DB) | Â | Â |
DB total length | 20.9 ± 1.7 (18.1-22.9) | 25.6 (23.8-27.4) |
DB width | 1.9 ± 0.2 (1.6-2.2) | 1.8 (1.7-1.9) |
DB attachment point length | 9.4 ± 0.4 (8.8-9.9) | 8.7 (8.6-8.7) |
Ventral bar (VB) | Â | Â |
VB total width | 25.0 ± 1.1 (23.5-26.7) | 26.2 (25.3-27.1) |
VB total length | 22.5 ± 1.6 (19.2-25.5) | 20.4 (20.4-20.5) |
VB process-to-mid length | 3.0 ± 0.5 (2.1-4.0) | 2.0 (1.8-2.3) |
VB median length | 6.2 ± 0.4 (5.6-6.8) | 6.2 (5.9-6.6) |
VB process length | 2.9 ± 0.4 (2.1-3.5) | 1.2 (1.1-1.3) |
VB membrane length | 13.2 ± 1.1 (10.7-15.2) | 11.9 (11.8-11.9) |
Marginal hook (MH) | Â | Â |
MH total length | 26.8 ± 0.6 (25.9-27.6) | 30.7 (30.7-30.8) |
MH shaft length | 20.8 ± 0.3 (20.2-21.5) | 24.3 (24.1-24.5) |
MH sickle length | 6.3 ± 0.2 (6.1-6.6) | 6.6 (6.3-6.9) |
MH sickle proximal width | 4.0 ± 0.2 (3.6-4.4) | 4.3 (4.2-4.3) |
MH toe length | 1.8 ± 0.1 (1.6-2.0) | 1.7 (1.6-1.7) |
MH sickle distal width | 3.6 ± 0.2 (3.3-4.0) | 3.7 (3.5-3.9) |
MH aperture | 5.6 ± 0.2 (5.4-6.0) | 5.7 (5.6-5.7) |
MH instep/arch height | 0.6 ± 0.1 (0.5-0.7) | 0.5 (0.5-0.6) |