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FIGURE 50. Rhabdochona rotundicaudatum Byrne, 1992. A in Guide to the Parasites of Fishes of Canada Part V: Nematoda

FIGURE 50. Rhabdochona rotundicaudatum Byrne, 1992. A. male, posterior end, lateral view; B. right spicule, lateral view; C. female, posterior end, lateral view. (Redrawn from Byrne 1992 a)

FIGURE 49. Rhabdochona ovifilamenta Weller, 1938. A in Guide to the Parasites of Fishes of Canada Part V: Nematoda

FIGURE 49. Rhabdochona ovifilamenta Weller, 1938. A. male, posterior end, lateral view; B. left spicule, distal tip; C. female, en face view; D. female, anterior end, dorsal view; E. mature eggs. NB: scale bars were not provided in the original for either B. or C. (Redrawn from Moravec & Arai 1971)

FIGURE 51. Rhabdochona zacconis Yamaguti, 1935. A in Guide to the Parasites of Fishes of Canada Part V: Nematoda

FIGURE 51. Rhabdochona zacconis Yamaguti, 1935. A. young female, anterior end, dorsal view; B. male, posterior end, lateral view; C. young male, left spicule, distal tip; D. young male, right spicule; E. female tail, dorsal view; F. eggs. (Redrawn from Moravec et al. 1981)

FIGURE 48. Rhabdochona milleri Choquette, 1951. A in Guide to the Parasites of Fishes of Canada Part V: Nematoda

FIGURE 48. Rhabdochona milleri Choquette, 1951. A. male, posterior end, lateral view; B. left spicule, distal tip; C. female, en face view; D. female, anterior end; E. mature eggs. NB: scale bars were not provided in the original for either B. or C. (Redrawn from Moravec & Arai 1971)

FIGURE 45. Rhabdochona cotti Gustafson, 1949. A in Guide to the Parasites of Fishes of Canada Part V: Nematoda

FIGURE 45. Rhabdochona cotti Gustafson, 1949. A. male, posterior end, lateral view; B. female, anterior end, lateral view; C. female tail, lateral view. (Redrawn from Moravec & Arai 1971)

FIGURE 46. Rhabdochona decaturensis Gustafson, 1949. A in Guide to the Parasites of Fishes of Canada Part V: Nematoda

FIGURE 46. Rhabdochona decaturensis Gustafson, 1949. A. female, anterior end, dorsal view; B. male, posterior end, lateral view; C. female tail, lateral view. (Redrawn from Moravec & Arai 1971)

FIGURE 43. Rhabdochona cascadilla Wigdor, 1918. A in Guide to the Parasites of Fishes of Canada Part V: Nematoda

FIGURE 43. Rhabdochona cascadilla Wigdor, 1918. A. male, posterior end, lateral view; B. right spicule, lateral view; C. female, head, lateral view; D. female, anterior end, lateral view; E. vulva, vagina and distal uterus, lateral view; F. embryonated egg. (Redrawn from Byrne 1992 a)

Fig. 6 in Integrated morphological and molecular characterization of the fish parasitic nematode Rhabdochona (Rhabdochona) gendrei Campana-Rouget, 1961 infecting Labeobarbus altianalis (Boulenger, 1900) in Kenya

Fig. 6. Bayesian inference phylogram of the cox1 mitochondrial gene region. Posterior probability support values are presented along branch nodes.

Fig. 4 in Integrated morphological and molecular characterization of the fish parasitic nematode Rhabdochona (Rhabdochona) gendrei Campana-Rouget, 1961 infecting Labeobarbus altianalis (Boulenger, 1900) in Kenya

Fig. 4. Rhabdochona (Rhabdochona) gendrei Campana-Rouget (1961) from Labeobarbus altianalis (Boulenger, 1900), scanning electron micrographs of a female. A (deirids shown by white circle), B, C – cephalic end dorsolateral and anterior views; D– lateral view of the excretory pore (as shown by white arrow); E – detail of vulva sub-ventral view; F, G – fully mature (larvated) eggs dissected out of the nematode body; H – tail tip (white arrows shows openings with a papilla); Abbreviations: a – amphids; c – submedian cephalic papilla; pt – anterior prostomal teeth.

Fig. 3 in Integrated morphological and molecular characterization of the fish parasitic nematode Rhabdochona (Rhabdochona) gendrei Campana-Rouget, 1961 infecting Labeobarbus altianalis (Boulenger, 1900) in Kenya

Fig. 3. Rhabdochona (Rhabdochona) gendrei Campana-Rouget (1961) from Labeobarbus altianalis (Boulenger, 1900), light micrographs of an adult male. A – left (longer) and right (shorter) spicules (dorsolateral view); B– left (longer) and right (shorter – showing the boat-like shape) spicules (ventrolateral view); black and white arrows indicate left and right spicules respectively.

Fig. 1. A in Integrated morphological and molecular characterization of the fish parasitic nematode Rhabdochona (Rhabdochona) gendrei Campana-Rouget, 1961 infecting Labeobarbus altianalis (Boulenger, 1900) in Kenya

Fig. 1. A map of River Nyando, in Lake Victoria Basin, showing the study locations at Koru and Ahero.

Fig. 5 in Integrated morphological and molecular characterization of the fish parasitic nematode Rhabdochona (Rhabdochona) gendrei Campana-Rouget, 1961 infecting Labeobarbus altianalis (Boulenger, 1900) in Kenya

Fig. 5. Phylograms of the 28S rRNA gene region based on the A– maximum likelihood and B – Bayesian Inference analyses. Bootstrap and posterior probability support values are presented along branch nodes. The branch length was reduced to two (//) and three (///) times the scale bar.

Fig. 2 in Integrated morphological and molecular characterization of the fish parasitic nematode Rhabdochona (Rhabdochona) gendrei Campana-Rouget, 1961 infecting Labeobarbus altianalis (Boulenger, 1900) in Kenya

Fig. 2. Rhabdochona (Rhabdochona) gendrei Campana-Rouget (1961) from Labeobarbus altianalis (Boulenger, 1900), scanning electron micrographs of the male. A – cephalic end, subapical view; B – deirid; (circled); C, D – posterior end of male, ventrolateral view (white stars and white circles indicate a pair of lateral pre- and postanal papillae, respectively); E – right spicule; F – excised right spicule, following enzymatic digestion. Abbreviations: a – amphid; 1–11, and 1–9 – pairs of sub-ventral preanal papillae (in C); 1–5 – pairs of postanal papillae (in D).

Fig. 14. Ascarophis arctica Polyanskiy, 1952 from Gasterosteus aculeatus Linnaeus, scanning electron micrographs. A in Rhabdochona angusticaudata sp. n. (Nematoda: Rhabdochonidae) from the Japanese eel Anguilla japonica, and new records of some other nematodes from inland fishes in Japan

Fig. 14. Ascarophis arctica Polyanskiy, 1952 from Gasterosteus aculeatus Linnaeus, scanning electron micrographs. A – posterior end of male, ventral view; B – tail of male, subventral view (arrows indicate postanal papillae); C – precloacal region, subventral view (arrows indicate preanal papillae; note weakly-developed ventral precloacal ridges); D – posterior end of male, sublateral view (arrows indicate two posteriormost pairs of postanal papillae; note ventral precloacal ridges); E – broken female body with eggs; F – egg with filaments on both poles; G – egg with filaments only on one pole.

Fig. 11. Rhabdochona zacconis Yamaguti, 1935 in Rhabdochona angusticaudata sp. n. (Nematoda: Rhabdochonidae) from the Japanese eel Anguilla japonica, and new records of some other nematodes from inland fishes in Japan

Fig. 11. Rhabdochona zacconis Yamaguti, 1935 from Tribolodon hakonensis (Günther), scanning electron micrographs. A, B – cephalic end of male, subapical and apical views, respectively (arrows indicate sublabia); C – deirid; D – tail of male, lateral view (arrow indicates cloaca); E – eggs dissected out from uterus; F – eggs with polar filaments. Abbreviations: a – cephalic papilla; b – amphid.

Fig. 13. Ascarophis arctica Polyanskiy, 1952 from Gasterosteus aculeatus Linnaeus, scanning electron micrographs. A–C in Rhabdochona angusticaudata sp. n. (Nematoda: Rhabdochonidae) from the Japanese eel Anguilla japonica, and new records of some other nematodes from inland fishes in Japan

Fig. 13. Ascarophis arctica Polyanskiy, 1952 from Gasterosteus aculeatus Linnaeus, scanning electron micrographs. A–C – cephalic end of female, lateral, apical and dorsoventral views, respectively; D – region of female mouth (another specimen), sublateral view; E – tail of female, ventral view; F – deirid; G – distal end of left spicule, ventral view. Abbreviations: a – amphid; b – cephalic papilla c – phasmid; d – anus; l – labium; p – pseudolabium with anterior tooth-like projection; s – sublabium.

Fig. 10 in Rhabdochona angusticaudata sp. n. (Nematoda: Rhabdochonidae) from the Japanese eel Anguilla japonica, and new records of some other nematodes from inland fishes in Japan

Fig. 10. Rhabdochona angusticaudata sp. n. from Anguilla japonica Temminck et Schlegel, scanning electron micrographs. A, B – anterior end of female body, sublateral and dorsoventral views (arrow indicates deirid); C – tail of male, lateral view; D – region of male tail with last postanal papilla and phasmid, lateral view; E – tail of gravid female, ventral view; F – vulva of gravid female, ventral view. Abbreviations: e – cloacal aperture; h – caudal papilla of last postanal pair; i – phasmid; k – anus.

Fig. 7. Heliconema anguillae Yamaguti, 1935 in Rhabdochona angusticaudata sp. n. (Nematoda: Rhabdochonidae) from the Japanese eel Anguilla japonica, and new records of some other nematodes from inland fishes in Japan

Fig. 7. Heliconema anguillae Yamaguti, 1935 from Anguilla japonica Temminck et Schlegel, scanning electron micrographs. A, B – cephalic end, subapical views (arrow indicates amphid); C – tail of male, sublateral view; D – ventral precloacal ridges and first two pairs of preanal papillae, ventral view; E – tail of male, ventral view; F – tail tip of male, ventral view (arrows indicate phasmids). Abbreviations: a – cephalic papilla; b – submedian tooth; c – lateral tooth; d – pseudolabial lateroterminal depression; e – cloacal aperture; f – papillae of first two preanal pairs; g – small ventral postanal papilla.

Fig. 8 in Rhabdochona angusticaudata sp. n. (Nematoda: Rhabdochonidae) from the Japanese eel Anguilla japonica, and new records of some other nematodes from inland fishes in Japan

Fig. 8. Rhabdochona angusticaudata sp. n. from Anguilla japonica Temminck et Schlegel. A – anterior part of male body, lateral view; B, C – anterior end of male, dorsoventral and lateral views, respectively; D – cephalic end of female, lateral view; E – cephalic end of male, apical view; F – deirid; G, H – distal end of left spicule (different specimens), lateral views; I – egg; J – female tail, lateral view; K – right spicule, lateral view; L – posterior end of male, lateral view; M – tail tip of female.

Fig. 2 in Rhabdochona angusticaudata sp. n. (Nematoda: Rhabdochonidae) from the Japanese eel Anguilla japonica, and new records of some other nematodes from inland fishes in Japan

Fig. 2. Hysterothylacium haze (Machida, Takahashi et Masuuchi, 1978) from Acanthogobius flavimanus (Temminck et Schlegel), scanning electron micrographs. A – anterior end of female with distinct lateral alae, dorsal view; B – cephalic end, apical view; C – dorsal lip; D – subventral lip; E – caudal end of male, lateral view (arrow indicates double papilla); F – distribution of papillae on caudal end, lateral view (another specimen; arrow indicates double papilla); G – posterior end of male, ventral view. Abbreviations: a – double cephalic papilla; b – single cephalic papilla; d – dorsal lip; e – amphid; i – interlabium; s – spicule.