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FIG. 7. — Tachygonetria khallaayounei n in Descriptions of two new species of the genus Tachygonetria Wedl, 1862 (Nematoda, Pharyngodonidae) and redescriptions of five species parasites of Palaearctic Testudinidae

FIG. 7. — Tachygonetria khallaayounei n. sp.; A, cephalic end, en face of female; B, cephalic end, en face of male; C, caudal extremity, ventral view of male; D-F, scanning electron micrograph (SEM); D, cephalic end of female; E, cephalic end of male; F, caudal

FIG. 3 in Descriptions of two new species of the genus Tachygonetria Wedl, 1862 (Nematoda, Pharyngodonidae) and redescriptions of five species parasites of Palaearctic Testudinidae

FIG. 3. — Tachygonetria setosa Seurat, 1918; A, cephalic end, en face of female; B, cephalic end, en face of male; C, caudal extremity, ventral view of male; D-F, scanning electron micrograph (SEM); D, cephalic end of female; E, cephalic end of male; F, caudal

FIG. 6. — Tachygonetria marocana n in Descriptions of two new species of the genus Tachygonetria Wedl, 1862 (Nematoda, Pharyngodonidae) and redescriptions of five species parasites of Palaearctic Testudinidae

FIG. 6. — Tachygonetria marocana n. sp.; A, cephalic end, en face of female; B, cephalic end, en face of male; C, caudal extremity, ventral view of male; D-F, scanning electron micrograph (SEM); D, cephalic end of female; E, cephalic end of male; F, caudal

FIG. 5 in Descriptions of two new species of the genus Tachygonetria Wedl, 1862 (Nematoda, Pharyngodonidae) and redescriptions of five species parasites of Palaearctic Testudinidae

FIG. 5. — Tachygonetria palearcticus (Petter, 1966); A, cephalic end, en face of female; B, cephalic end, en face of male; C, caudal extremity, ventral view of male; D-F, scanning electron micrograph (SEM); D, cephalic end of female; E, cephalic end of male; F, caudal extremity of male, ventral view. Abbreviation: d, crescent-shaped cuticularized plates. Scale bars: A, B, 10 μm; C, 25 μm;

FIG. 1 in Descriptions of two new species of the genus Tachygonetria Wedl, 1862 (Nematoda, Pharyngodonidae) and redescriptions of five species parasites of Palaearctic Testudinidae

FIG. 1. — Tachygonetria numidica Seurat, 1918; A, cephalic end, en face of female; B, cephalic end, en face of male; C, caudal extremity, ventral view of male; D-F, scanning electron micrograph (SEM); D, cephalic end of female; E, cephalic end of male; F, caudal extremity of male, ventral view. Abbreviations: a, cephalic arc of broad line; b, superficial opaque lips; c, subjacent trans-

Fig. 5. A in Three new species of Mesacanthion Filipjev, 1927 (Nematoda: Thoracostomopsidae) from Argentine coasts

Fig. 5. A. Pharyngeal region of Mesacanthion longigubernaculum sp. nov., ♂, holotype (CNP-NEM 27442). B. Pharyngeal region of M. sanantoniensis sp. nov., ♂, paratype (CNP-NEM 848). C. Detail of M. longigubernaculum sp. nov., ♂, holotype (CNP-NEM 27442), showing cuticular striation. D. Gubernaculum of M. bifidum sp. nov., ♂, holotype (CNP-NEM 936). E. Detail of M. sanantoniensis sp. nov., ♂, paratype (CNP-NEM 848), showing cuticular striation.

Fig. 4 in Three new species of Mesacanthion Filipjev, 1927 (Nematoda: Thoracostomopsidae) from Argentine coasts

Fig. 4. Mesacanthion sanantoniensis sp. nov., ♂, holotype (CNP-NEM 849). A. Cephalic sense organs on anterior end. B. Posterior end, showing copulatory apparatus and precloacal supplement organ. C. Copulatory apparatus, spicules and gubernaculum. D. Gonads. Scale bars: 1 = 20 μm; 2 = 100 μm.

Fig. 3 in Three new species of Mesacanthion Filipjev, 1927 (Nematoda: Thoracostomopsidae) from Argentine coasts

Fig. 3. Mesacanthion longigubernaculum sp. nov., ♂, holotype (CNP-NEM 27442). A. Cephalic sense organs on anterior end. B. Posterior end, showing copulatory apparatus and precloacal supplement organ. C. Gonads. D. Copulatory apparatus, spicules and gubernaculum. Scale bars: 1 = 20 μm; 2 = 100 μm; 3 = 10 μm.

Fig. 2 in Three new species of Mesacanthion Filipjev, 1927 (Nematoda: Thoracostomopsidae) from Argentine coasts

Fig. 2. Mesacanthion bifidum sp. nov. A. Cephalic sense organs on anterior end of female paratype (CNP- NEM 983). B. Cephalic sense organs on male holotype (CNP-NEM 936). C. Female paratype (CNP- NEM 983) showing vulva and gonadal apparatus. D. Precloacal supplement organ of male holotype (CNP-NEM 936). E. Posterior end of male holotype (CNP-NEM 936). F. Copulatory apparatus, spicules and gubernaculum of male holotype (CNP-NEM 936). G. Gonads of male holotype (CNP-NEM 936). H. Posterior end of female paratype (CNP-NEM 983). Scale bars: 1 = 20 μm; 2 = 100 μm; 3 = 200 μm.

Fig. 1 in Three new species of Mesacanthion Filipjev, 1927 (Nematoda: Thoracostomopsidae) from Argentine coasts

Fig. 1. Map showing the study sites; map of sampling areas. A. ʻSan Antonio Oeste river estuaryʼ, Río Negro Province. B. ʻPuerto Madryn cityʼ and ʻBahía Kaiserʼ, Chubut Province. C. ʻRada Tillyʼ, Chubut Province.

Fig. 16 in Description of five new and six known species of the genus Basirotyleptus Jairajpuri, 1964 (Nematoda: Dorylaimida: Tylencholaimoidea) from the Western Ghats, India

Fig. 16. Basirotyleptus siddiqii sp. nov., ♀. A–B, D–G. Holotype (AMU/ZD/NC/Basirotyleptus siddiqii/1). C. Paratype 1 (AMU/ZD/NC/Basirotyleptus siddiqii/2). A. Entire specimen. B–C. Anterior region. D. Anterior region showing amphid. E. Pharyngeal region. F. Genital system. G. Posterior region.

Fig. 13 in Description of five new and six known species of the genus Basirotyleptus Jairajpuri, 1964 (Nematoda: Dorylaimida: Tylencholaimoidea) from the Western Ghats, India

Fig. 13. Basirotyleptus goaensis sp. nov., ♀ (LM photographs). A–B, D–M. Paratypes (AMU/ZD/NC/ Basirotyleptus goaensis/2–6). A, D–F, H, K. Paratype 1. B, G, J. Paratype 2. C. Holotype (AMU/ ZD/NC/Basirotyleptus goaensis/1). I. Paratype 4. L. Paratype 5. M. Paratype 3. A–B. Anterior region. C–D. Anterior region showing amphid. E. Pharyngeal region. F–G. Pharyngeal bulb. H. Cuticle showing punctations. I–K. Genital system. L. Posterior region. M. Posterior end. Scale bars: A–D, F–H, J–K, M = 10 µm; E, I = 20 µm.

Fig. 5 in Description of five new and six known species of the genus Basirotyleptus Jairajpuri, 1964 (Nematoda: Dorylaimida: Tylencholaimoidea) from the Western Ghats, India

Fig. 5. Basirotyleptus acus Goseco, Ferris & Ferris, 1974, ♀ (AMU/ZD/NC/Basirotyleptus acus/1–4) (LM photographs). A–C. Anterior region. D. Anterior region showing amphid. E. Pharyngeal region. F–G. Pharyngeal bulb. H. Genital system. I. Vulval region. J–K. Posterior region. L. Posterior end. Scale bars = 10 µm.

Fig. 12 in Description of five new and six known species of the genus Basirotyleptus Jairajpuri, 1964 (Nematoda: Dorylaimida: Tylencholaimoidea) from the Western Ghats, India

Fig. 12. Basirotyleptus goaensis sp. nov., ♀. A–E, G. Paratypes (AMU/ZD/NC/Basirotyleptus goaensis/2–6). A. Paratype 7. B, D, G. Paratype 4. C. Paratype 2. E. Paratype 1. F. Holotype (AMU/ ZD/NC/Basirotyleptus goaensis/1). A. Entire specimen. B. Anterior region. C. Anterior region showing amphid. D. Pharyngeal region. E. Pharyngeal bulb. F. Genital system. G. Posterior region.

Fig. 1. Basirotyleptus basiriJairajpuri, 1964 in Description of five new and six known species of the genus Basirotyleptus Jairajpuri, 1964 (Nematoda: Dorylaimida: Tylencholaimoidea) from the Western Ghats, India

Fig. 1. Basirotyleptus basiriJairajpuri, 1964 (AMU/ZD/NC/ Basirotyleptus basiri/1–3) (LM photographs). A –B. Female, anterior region. C. Female, anterior region showing amphid. D. Female, pharyngeal region. E–F. Female, pharyngeal bulb. G–I. Female, genital system. J–K. Female, posterior region. L–M. Male, posterior end. Scale bars = 10 µm.

Fig. 7. Basirotyleptus minutus Khan, 1987 in Description of five new and six known species of the genus Basirotyleptus Jairajpuri, 1964 (Nematoda: Dorylaimida: Tylencholaimoidea) from the Western Ghats, India

Fig. 7. Basirotyleptus minutus Khan, 1987, ♀ (AMU/ZD/NC/Basirotyleptus minutus/1) (LM photographs). A–B. Anterior region. C. Anterior region showing amphid. D. Pharyngeal region. E–F. Pharyngeal bulb. G. Vulval region. H. Genital system. I. Posterior region. J–K. Posterior end. Scale bars = 10 µm.

Fig. 17 in Description of five new and six known species of the genus Basirotyleptus Jairajpuri, 1964 (Nematoda: Dorylaimida: Tylencholaimoidea) from the Western Ghats, India

Fig. 17. Basirotyleptus siddiqii sp. nov., ♀ (LM photographs). A–B, E, I–K. Holotype (AMU/ZD/ NC/Basirotyleptus siddiqii/1). C–D, F–H. Paratype 1 (AMU/ZD/NC/Basirotyleptus siddiqii/2). A. Entire specimen. B–C. Anterior region. D. Pharyngeal region. E. Anterior region showing amphid. F. Pharyngeal bulb. G. Vulval region. H–I. Genital system. J. Posterior region. K. Posterior end. Scale bars: A = 20 µm; B–K = 10 µm.

Fig. 9 in Description of five new and six known species of the genus Basirotyleptus Jairajpuri, 1964 (Nematoda: Dorylaimida: Tylencholaimoidea) from the Western Ghats, India

Fig. 9. Basirotyleptus conicaudatus sp. nov. (LM photographs). A, C–I. Holotype, ♀ (AMU/ZD/ NC/Basirotyleptus conicaudatus/1). B. Paratype 1, ♀ (AMU/ZD/NC/Basirotyleptus conicaudatus/2). J–K. Paratype 2, ♂ (AMU/ZD/NC/Basirotyleptus conicaudatus/2). A–B. Female, anterior region. C. Female, anterior region showing amphid. D. Female, pharyngeal region. E. Female, pharyngeal bulb. F–G. Female, genital system. H. Female, posterior region. I. Female, posterior end. J–K. Male, posterior end. Scale bars = 10 µm.

Fig. 2 in Description of five new and six known species of the genus Basirotyleptus Jairajpuri, 1964 (Nematoda: Dorylaimida: Tylencholaimoidea) from the Western Ghats, India

Fig. 2. Basirotyleptus pini Siddiqi & Khan, 1964, ♀ (AMU/ZD/NC/Basirotyleptus pini/1–3) (LM photographs). A–B. Anterior region. C. Anterior region showing amphid. D. Pharyngeal region. E–F. Pharyngeal bulb. G. Genital system. H. Vulval region. I. Posterior region. J. Posterior end. Scale bars =10 µm.

Fig. 15 in Description of five new and six known species of the genus Basirotyleptus Jairajpuri, 1964 (Nematoda: Dorylaimida: Tylencholaimoidea) from the Western Ghats, India

Fig. 15. Basirotyleptus neocaudatus sp. nov. (LM photographs). A, C–D, J–M. Paratypes (AMU/ ZD/NC/Basirotyleptus neocaudatus/2–4). A, D. Paratype 6, ♀. B. Specimen 14, ♀ (AMU/ZD/NC/ Basirotyleptus neocaudatus/9). C. Paratype 4, ♀. E. Specimen 21, ♀ (AMU/ZD/NC/Basirotyleptus neocaudatus/11). F. Specimen 24, ♀ (AMU/ZD/NC/Basirotyleptus neocaudatus/12). G. Specimen 25, ♀ (AMU/ZD/NC/Basirotyleptus neocaudatus/12). H–I. Holotype, ♀ (AMU/ZD/NC/Basirotyleptus neocaudatus/1). J. Paratype 2, ♀. K. Paratype 1, ♀. L–M. Paratype, ♂. A–C. Female, anterior region. D. Female, anterior region showing amphid. E. Female, pharyngeal region. F–G. Female, pharyngeal bulb. H. Female, genital system. I. Vulval region. J. Female, posterior region. K. Female, posterior end. L. Male, posterior region. M. Male, posterior end. Scale bars =10 µm.