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Fig. 3. Enchodelus laevis Thorns, 1939. - A in Enchodelus repis sp. n. and comments on E. laevis Thorne, 1939 and E. microdoroides Baqri & Jairajpuri, 1974 (Nematoda : Dorylaimoidea) from Korea

Fig. 3. Enchodelus laevis Thorns, 1939. - A: Posterior part ofoesophagus; B: Head; C:Vagina; D: Female tail; E: Male tail. r5mallesl unie ofscalebar = 10 f.lm.)

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Fig. 4 in On Some Species of Enchodelus Thorne, 1939 from India (Nematoda: Dorylaimidae)

Fig. 4 Embodc//ıf zonafus n. sp .. female. A: oesophageal region; B: anterior end; C: vulva; D: tail.

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Fig. 3. Enchodelu.rconstrictus n in On Some Species of Enchodelus Thorne, 1939 from India (Nematoda: Dorylaimidae)

Fig. 3. Enchodelu.rconstrictus n. sp. A: female, oesophageal region; B: female, anterior end; C: female gonad; D: female tail; E: male tail.

Fig. 5 in Additional data on Spinitectus petterae (Nematoda: Rhabditida) from Clarias gariepinus (Siluriformes: Clariidae) in the Vaal River system: conserved morphology or high intraspecific genetic variability?

Fig. 5. Scanning electron micrographs of immature female of Spinitectus petterae Boomker, 1993 collected from Clarias gariepinus (Burchell). A – apical view of cephalic region; B – vulva; C – conical tail end; D – conical tail. Abbrevations: A – anus; CA – caudal papilla; L – labium; MT – mucron tip; PL – pseudolabium.

Fig. 4 in Additional data on Spinitectus petterae (Nematoda: Rhabditida) from Clarias gariepinus (Siluriformes: Clariidae) in the Vaal River system: conserved morphology or high intraspecific genetic variability?

Fig. 4. Illustrations of Spinitectus petterae Boomker, 1993 – male, reproductive structures and tail end. A – lateral aspect of posterior section with left and right spicules, and associated structures; B – tip of left spicule from two views and tip of the right spicule with fleshy extension; C – ventral aspect of posterior section with caudal papillae and cloacal opening. Abbreviation: C – cloacal opening; CCO – cytoplasmic core opening; LS – left spicule; LSB – left spicule blade; LSS – left spicule shaft; M – manubrium; PcP – postcloacal papillae; PP – precloacal papillae; RP – rugosa plates; RS – right spicule; SM – spicule muscle; SP – spicular pouch; VD – vas deferens.

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Fig. 2 in Native species Maxvachonia chabaudi Mawson, 1972 (Nematoda: Cosmocercoidea) found in the invasive marine toad Rhinella marina (Linnaeus) (Anura: Bufonidae) in Australia

Fig. 2. Scanning electron micrographs of Maxvachonia chabaudi Mawson, 1972 from the marine toad Rhinella marina (Linnaeus) (Anura: Bufonidae) in Australia, male. A – anterior part of body (lateral ala arrowed), lateral view; B – cephalic end (amphid arrowed), apical view; C, G – posterior end of different individuals (white arrows showing precloacal papillae, black arrow showing lateral ala), lateral view; D – magnified image of precloacal papilla; E – magnified image of postcloacal papilla; F – magnified image of cloacal region (white arrow showing precloacal medio-ventral papilla, black arrows showing paracloacal papillae); H – tail (white arrows showing postcloacal papillae, black arrow showing phasmid), lateral view; I – magnified image of phasmid. Abbreviations: d – dorsal lip; g – tip of gubernaculum; i – inner flange of lips; v – ventrolateral lip.

Fig. 7 in Additional data on Spinitectus petterae (Nematoda: Rhabditida) from Clarias gariepinus (Siluriformes: Clariidae) in the Vaal River system: conserved morphology or high intraspecific genetic variability?

Fig. 7. Phylogenetic relationships of Spinitectus spp. based on available cox1 mtDNA for Spinitectus based on Bayesian inference (BI)), with Rhabdochona xiphophori Caspeta-Mandujano, Moravec et Salgado-Maldonado, 2001 as the designated outgroup. Posterior probability (BI) and 1,000 bootstrap replicate (maximum likelihood (ML)) support indicated (BI/ML), nodes with less than 0.5 (50 %) support not annotated. Data shaded in colour from indicated geographical locality or river system, and three haplotypes recorded from the Vaal River system indicated (VRS1–VRS3).

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.

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Fig. 3 in Native species Maxvachonia chabaudi Mawson, 1972 (Nematoda: Cosmocercoidea) found in the invasive marine toad Rhinella marina (Linnaeus) (Anura: Bufonidae) in Australia

Fig. 3. Scanning electron micrographs of Maxvachonia chabaudi Mawson, 1972 from the marine toad Rhinella marina (Linnaeus) (Anura: Bufonidae) in Australia, female. A – anterior part of body (excretory pore and vulva arrowed), ventral view; B – magnified im- age of excretory pore; C – magnified image of vulva; D – cephalic end (amphids arrowed), apical view; E – egg (small nipple arrowed); F – tail, lateral view; G – magnified image of tail tip. Abbreviations: d – dorsal lip; v – ventrolateral lip.

Fig. 2 in Additional data on Spinitectus petterae (Nematoda: Rhabditida) from Clarias gariepinus (Siluriformes: Clariidae) in the Vaal River system: conserved morphology or high intraspecific genetic variability?

Fig. 2. Light and scanning electron micrographs of adult females of Spinitectus petterae Boomker, 1993 collected from Clarias gariepinus (Burchell). A – neck showing spines on annular rings; B – first three rings on neck, rings indicated numerically and spine length measurement illustrated; C – apical view of the cephalic region; D – lateral view of cephalic region; E – apical view of cephalic structures; F – excretory pore; G – diminishing spines; H – posterior end; inlay gonopore with vulva I – posterior end with gonopore, vulva position indicated; J – conical tail tip; K – conical tail and mucron tip. Abbreviations: A – anus; AP – amphid; CP – cephalic papillae; L – labia; MT – mucron tip; PL – pseudolabia; PS – porous structure; OO – oral opening; V – vulva; SL – sublabium.

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.

Fig. 6 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. 6. Paraquimperia tenerrima (von Linstow, 1878) from Anguilla anguilla (Linnaeus), Czech Republic, scanning electron micrographs of mouth. A – apical view; B – subdorsal view. Abbreviations: a – amphid; b – cephalic papilla; c – two tooth-like structures of neighbouring sectors of mouth mound; d – oesophageal tooth.

Fig. 9 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. 9. Rhabdochona angusticaudata sp. n. from Anguilla japonica Temminck et Schlegel, scanning electron micrographs. A – cephalic end of male, lateral view; B – cephalic end of female, apical view; C – cephalic end of male, apical view; D – mouth region of female, apical view (arrow indicates sublabium); E – cephalic end of male (another specimen) with more numerous (16) anterior teeth, apical view; F – deirid. Abbreviations: a – amphid; b – cephalic papilla.

Fig. 1. A in Additional data on Spinitectus petterae (Nematoda: Rhabditida) from Clarias gariepinus (Siluriformes: Clariidae) in the Vaal River system: conserved morphology or high intraspecific genetic variability?

Fig. 1. A – map of South Africa; B – map of the river systems in the inlay showing the sampling sites where Spinitectus petterae Boomker, 1993 was collected in Clarias gariepinus (Burchell). Abbreviations: 1 – down-stream of the Vaal River Barrage; 2 – in the Vaal Dam reservoir; 3 – down-stream of the Grootdraai Dam; 4 – Crocodile River.