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14 results for “Gyrodactylus sp.”
Figure 2 in Gyrodactylus magadiensis n. sp. (Monogenea, Gyrodactylidae) parasitising the gills of Alcolapia grahami (Perciformes, Cichlidae), a fish inhabiting the extreme environment of Lake Magadi, Kenya
Figure 2. Line drawings of the haptoral sclerites and MCO of Gyrodactylus magadiensis n. sp. from Alcolapia grahami in Lake Magadi, Kenya. (A) Haptoral sclerites with hamulus (ha), dorsal bar (db), and ventral bar (vb); (B) marginal hook; (C) male copulatory organ (MCO). Scale bars – (A) 20 µm; (B and C) 5 µm.
Figure 4 in Gyrodactylus magadiensis n. sp. (Monogenea, Gyrodactylidae) parasitising the gills of Alcolapia grahami (Perciformes, Cichlidae), a fish inhabiting the extreme environment of Lake Magadi, Kenya
Figure 4. Evolutionary history of Gyrodactylus magadiensis n. sp. based on Bayesian Inference approaches using ITS sequences for selected gyrodactylids. Statistical support for Bayesian inference (BI) and maximum likelihood (ML) methods indicated at branch nodes with posterior probabilities and bootstrap support indicated, respectively (ML/BI).
Figure 1 in Gyrodactylus magadiensis n. sp. (Monogenea, Gyrodactylidae) parasitising the gills of Alcolapia grahami (Perciformes, Cichlidae), a fish inhabiting the extreme environment of Lake Magadi, Kenya
Figure 1. Collection sites from which Alcolapia grahami were collected. (A) Silhouette of Africa showing area of study; (B) map of study area indicating countries, water bodies, and relation of Lake Magadi to Nairobi; (C) fish spring lagoon of Lake Magadi from which the fish specimens were collected.
Figure 3 in Gyrodactylus magadiensis n. sp. (Monogenea, Gyrodactylidae) parasitising the gills of Alcolapia grahami (Perciformes, Cichlidae), a fish inhabiting the extreme environment of Lake Magadi, Kenya
Figure 3. Light (LM) and scanning electron (SEM) micrographs of the haptoral sclerites and male copulatory organ (MCO) of Gyrodactylus magadiensis n. sp. (A) Haptoral sclerites with hamulus (ha), dorsal bar (db), and marginal hooks (mh), GAP (LM); (B) hamulus (ha) and dorsal bar (db) after soft tissue digestion (SEM); (C) isolated marginal hook (SEM); (D) dorsal bar (LM); (E) dorsal view of dorsal bar (SEM); (F) ventral view of dorsal bar (SEM); (G) male copulatory organ (MCO) with large central spine and six spinelets, two large and four small (LM). Scale bars – (A and B) 20 µm; (C and G) 5 µm; (D–F) 10 µm.
Fig. 2 in Gyrodactylus molweni sp. n. (Monogenea: Gyrodactylidae) from Chelon richardsonii (Smith, 1846) (Mugilidae) from Table Bay, South Africa
Fig. 2. Light micrographs of the attachment hooks of Gyrodactylus molweni sp. n. A. The haptoral central hook complex of hamuli, and ventral bar. B. Hamulus. C. Marginal hook. Scale Bars = 10 μm.
Fig. 1 in Gyrodactylus molweni sp. n. (Monogenea: Gyrodactylidae) from Chelon richardsonii (Smith, 1846) (Mugilidae) from Table Bay, South Africa
Fig. 1. Gyrodactylus molweni sp. n. A. The haptoral central hook complex of hamuli (ham), dorsal (db) and ventral (vb) bars. B. Hamulus. C. Ventral bar (vb) which for this species bears large ventral bar processes (vbp) and a rhomboid-shaped ventral bar membrane (vbm). D. Male copulatory organ bearing a single principal spine (ps) and then a single row of four small spines, the outer two larger than the central pair. E. Marginal hook. Scale Bars = 10 μm.
Fig. 3 in Gyrodactylus molweni sp. n. (Monogenea: Gyrodactylidae) from Chelon richardsonii (Smith, 1846) (Mugilidae) from Table Bay, South Africa
Fig. 3. Comparison of the marginal hook sickle of Gyrodactylus molweni sp. n. (dotted outline) with those of Gyrodactylus species described from various mullet species and with a number of closely related species. Each pair of marginal hook sickles are aligned by their inner curved faces. A. G. molweni sp. n.; B. G. arcuatus Bychowsky, 1933 (drawn from a scanning electron micrograph of liberated hooks from specimens parasitizing Gasterosteus aculeatus L.); C. G. arcuatoides Huyse, Malmberg and Volckaert, 2004 (redrawn from Huyse et al., 2004); D. G. branchialis Huyse, Malmberg and Volckaert, 2004 (redrawn from Huyse et al., 2004); E. G. flavescensis Huyse, Malmberg and Volckaert, 2004 (redrawn from Huyse et al., 2004); F. G. gondae Huyse, Malmberg and Volckaert, 2004 (redrawn from Huyse et al., 2004); G. G. mugelus Rawson, 1973 (redrawn from Rawson, 1973); and, H. G. zhukovi Ling, 1963 (redrawn from Miroshnichenko and Maltsev, 1998).
FIGURES 32–38 in Gyrodactylus jarocho sp. nov. and Gyrodactylus xalapensis sp. nov. (Platyhelminthes: Monogenea) from Mexican poeciliids (Teleostei: Cyprinodontiformes), with comments on the known gyrodactylid fauna infecting poeciliid fish
FIGURES 32–38. Gyrodactylus jarocho sp. nov. from Xiphophorus hellerii Heckel. 32. Light micrograph of the haptoral central hook complex showing the hamuli, the dorsal and the ventral bar (ventral view); 33. Light micrograph of the marginal hook; 34–35. Light micrographs of the marginal hook sickles; 36. Drawing of the central hook complex; 37. Drawing of the marginal hook sickle; 38. Drawing of the male copulatory organ (MCO). Scale bars: Figures 32, 33 and 36 = 5 µm; Figures 34, 35, 37 and 38 = 3 µm.
FIGURES 39–46 in Gyrodactylus jarocho sp. nov. and Gyrodactylus xalapensis sp. nov. (Platyhelminthes: Monogenea) from Mexican poeciliids (Teleostei: Cyprinodontiformes), with comments on the known gyrodactylid fauna infecting poeciliid fish
FIGURES 39–46. Gyrodactylus xalapensis sp. nov. from Heterandria bimaculata Heckel. 39. Light micrograph of the haptoral central hook complex showing the hamuli, the dorsal and the ventral bar (ventral view); 40–41. Light micrographs of the marginal hooks; 42. Light micrograph of the marginal hook sickle; 43. Light micrographs of the male copulatory organ (MCO); 44. Drawing of the central hook complex; 45. Drawing of the marginal hook sickle; 46. Drawing of the MCO. Scale bars: Figures 39–41 and 44 = 5 µm; Figures 42, 43, 45 and 46 = 3 µm.
FIGURE 31 in Gyrodactylus jarocho sp. nov. and Gyrodactylus xalapensis sp. nov. (Platyhelminthes: Monogenea) from Mexican poeciliids (Teleostei: Cyprinodontiformes), with comments on the known gyrodactylid fauna infecting poeciliid fish
FIGURE 31. Principal components analysis plot (Factor1 vs Factor2) of Gyrodactylus bullatarudis Turnbull, 1956, Gyrodactylus cytophagus Paperna, 1968, Gyrodactylus poeciliae Harris & Cable, 2000, Gyrodactylys rasini Lucký, 1973 and Gyrodactylus xalapensis sp. nov. (13 ln-transformed variables; n = 29 specimens). The specimens of G. xalapensis sp. nov. (ellipse 1) are clearly separated from G. rasini (ellipse 2). Separation of the specimens is effected by the several hamulus variables acting along Factor1 (total length (HTL), shaft length (HSL), point length (HPL), aperture distance (HA), distal shaft width (HDSW) and the proximal shaft width (HPSW)) and by point curve angle of the hamulus (CosHPCA), the total length (MHTL) and shaft length (MHSL) of the marginal hook acting through Factor2. Plot codes: a. G. bullatarudis from Poecilia mexicana Steindachner; b. G. bullatarudis from Xiphophorus hellerii Heckel; d. G. xalapensis sp. nov. from Heterandria bimaculata Heckel; e. G. bullatarudis paratype from Poecilia sphenops Valenciennes; j. G. poeciliae from Poecilia caucana (Steindachner); l. G. cytophagus from Aplocheilichthys pumilus (Boulenger); m. G. rasini from X. hellerii.
FIGURE 30 in Gyrodactylus jarocho sp. nov. and Gyrodactylus xalapensis sp. nov. (Platyhelminthes: Monogenea) from Mexican poeciliids (Teleostei: Cyprinodontiformes), with comments on the known gyrodactylid fauna infecting poeciliid fish
FIGURE 30. Principal Components Analysis plot (Factor1 vs Factor2) of the 13 point-to-point measurements made on 45 gyrodactylids collected from a range of poeciliid hosts. Separation of the specimens is principally influenced by the hamulus total length (HTL), shaft length (HSL), point length (HPL) and aperture distance (HA) acting along Factor1 in a negative direction, and the inner (CosIHAA) and outer (CosHAA) hamulus angles acting along Factor1 in a positive direction. The total length (MHTL) and the shaft length (MHSL) of the marginal hook are key variables in the separation of specimens along Factor2. The raw ellipses highlight the specimens of Gyrodactylus xalapensis sp. nov. from Heterandria bimaculata Heckel (1), and Gyrodactylus jarocho sp. nov. from Xiphophorus hellerii Heckel (2). Plot codes: a. Gyrodactylus bullatarudis Turnbull, 1956 from Poecilia mexicana Steindachner; b. G. bullatarudis from X. hellerii; c. G. j a ro c h o sp. nov. from X. hellerii; d. G. xalapensis from H. bimaculata; e. G. bullatarudis paratype from Poecilia sphenops Valenciennes; f. Gyrodactylus costaricensis Kritsky & Fritts, 1970 from P. sphenops; g. Gyrodactylus gambusiae Rogers & Wellborn, 1965 from Gambusia affinis Baird & Girard; h. Gyrodactylus pictae Cable, van Oosterhout, Barson & Harris, 2005 from Micropoecilia (=Poecilia) picta Regan; i. Gyrodactylus turnbulli Harris, 1986 from Poecilia reticulata Peters; j. Gyrodactylus poeciliae Harris & Cable, 2000 from Poecilia caucana Steindachner; k. Gyrodactylus milleri Harris & Cable, 2000 from P. caucana; l. Gyrodactylus cytophagus Paperna, 1968 from Aplocheilichthys pumilus Boulenger; m. Gyrodactylus rasini Lucký, 1973 from X. hellerii.
FIGURES 1–14. A in Gyrodactylus jarocho sp. nov. and Gyrodactylus xalapensis sp. nov. (Platyhelminthes: Monogenea) from Mexican poeciliids (Teleostei: Cyprinodontiformes), with comments on the known gyrodactylid fauna infecting poeciliid fish
FIGURES 1–14. A size invariant comparison of the marginal hook sickles of two new species of Gyrodactylus with the nine species previously recorded infecting poeciliids. 1. Gyrodactylus jarocho sp. nov.; 2. Gyrodactylus xalapensis sp. nov.; 3. Gyrodactylus bullatarudis Turnbull, 1956 (re-examination); 4. Overlay of G. bullatarudis with G. j a ro c h o sp. nov. (broken line); 5. Overlay of G. bullatarudis with G. xalapensis sp. nov. (broken line); 6. Gyrodactylus costaricensis Kritsky & Fritts, 1970 (re–examination); 7. Overlay of G. costaricensis with G. j a ro c h o sp. nov. (broken line); 8. Overlay of G. costaricensis with G. xalapensis sp. nov. (broken line); 9. Gyrodactylus cytophagus Paperna, 1968 (reexamination); 10. Overlay of G. cytophagus with G. ja ro c ho sp. nov. (broken line); 11. Overlay of G. cytophagus with G. xalapensis sp. nov. (broken line); 12. Gyrodactylus gambusiae Rogers & Wellborn, 1965 (re-examination); 13. Overlay of G. gambusiae with G. j a ro c h o sp. nov. (broken line); 14. Overlay of G. gambusiae with G. xalapensis sp. nov. (broken line). Scale bars = 3 µm.
FIGURES 47–52 in Gyrodactylus jarocho sp. nov. and Gyrodactylus xalapensis sp. nov. (Platyhelminthes: Monogenea) from Mexican poeciliids (Teleostei: Cyprinodontiformes), with comments on the known gyrodactylid fauna infecting poeciliid fish
FIGURES 47–52. Light photographs and drawings of Gyrodactylus milleri Harris & Cable, 2000 (holotype), showing the three different sizes and morphologies of the marginal hook sickles. 47, 50. Small marginal hook sickle; 48, 51. Medium sized marginal hook sickle; 49, 52. Large marginal hook sickle. Scale bar = 3 µm.
FIGURES 15–29. A in Gyrodactylus jarocho sp. nov. and Gyrodactylus xalapensis sp. nov. (Platyhelminthes: Monogenea) from Mexican poeciliids (Teleostei: Cyprinodontiformes), with comments on the known gyrodactylid fauna infecting poeciliid fish
FIGURES 15–29. A size invariant comparison of the marginal hook sickles of two new species of Gyrodactylus with the nine species previously recorded infecting poeciliids. 15. Gyrodactylus milleri Harris & Cable, 2000 (re-examination of the small, common form of marginal hook); 16. Overlay of G. milleri with G. j aroc h o sp. nov. (broken line); 17. Overlay of G. milleri with G. xalapensis sp. nov. (broken line); 18. Gyrodactylus pictae Cable, van Oosterhout, Barson & Harris, 2005 (re-examination); 19. Overlay of G. pictae with G. ja ro c ho sp. nov. (broken line); 20. Overlay of G. pictae with G. xalapensis sp. nov. (broken line); 21. Gyrodactylus poeciliae Harris & Cable, 2000 (re-examination); 22. Overlay of G. poeciliae with G. jaroc h o sp. nov. (broken line); 23. Overlay of G. poeciliae with G. xalapensis sp. nov. (broken line); 24. Gyrodactylus rasini Lucký, 1973 (re-examination); 25. Overlay of G. r a s i n i with G. j a ro c ho sp. nov. (broken line); 26. Overlay of G. rasini with G. xalapensis sp. nov. (broken line); 27. Scanning electron micrograph of Gyrodactylus turnbulli Harris, 1986 from Andrew P. Shinn's collection (re-examination); 28. Overlay of G. turnbulli with G. j a ro c ho sp. nov. (broken line); 29. Overlay of G. turnbulli with G. xalapensis sp. nov. (broken line). Scale bars = 3 µm.
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