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FIGURE 4. Marine triclads. a in Updated inventory and distribution of free-living flatworms from Tunisian waters

FIGURE 4. Marine triclads. a Cleared whole mount of Procerodes dohrni. Note the presence of horn-shaped auricles in the anterior margin of body arrowheads. The pharynx ph is located in the second third of body. The testes (arrows) are distributed between intestinal ramifications ir. Penis papilla pp. b Cleared whole mount of Procerodes lobatus. Note the presence of flat auricles appearing as anterior marginal expansions (folds) arrowheads. The pharynx ph is located in the second half of body. Testes (arrows) are superimposed with intestine ramifications ir; penis papillae pp. c Cleared whole mount of Cerbussowia cerruti. The pharynx ph is located in the last third of body. A pair of oval shaped testes t and piriform ovaries ov are located anteriorly to the pharynx; vas deferens vd; intestine ramifications ir. d Procerodes lobatus. Dorsal view e Cercyra hastata. Ventral view showing everted pharynx ph and pigmented anterior end pae. f Cercyra hastata. Dorsal view. g Cleared whole mount of male specimen of Sabussowia dioica. The pharynx ph is located in the posterior part of the body. Testis (arrows) are distributed in all parts of the body. h Cleared whole mount of female specimen of Sabussowia dioica showing spermatophore (arrowhead) being impregnated to the marginal tissue of the body. Ovaries ov are located behind cerebral area. i Cleared whole mount of female specimen of Sabussowia dioica showing cocoon cc in uterus. Scale bars: 4a–c: 0.5mm; 4d: 0.5mm; 4e–f: 1mm; 4g–i: 1 mm.

FIGURE 2 in Updated inventory and distribution of free-living flatworms from Tunisian waters

FIGURE 2. Polyclads from Tunisian waters. Dorsal view in all panels, anterior to the left. a Leptoplana mediterranea. b Leptoplana tremellaris. c Echinoplana celerrima. d Theama mediterranea; the depicted specimen was collected in Calvi, Corse. e Imogine mediterranea. f Discocelis tigrina. g Cestoplana rubrocinta. h Comoplana agilis. i Prosthiostomum siphunculus. j Prostheceraeus moseleyi. k Thysanozoon brocchii. l Pseudoceros maximus. m Yungia aurantiaca n hatching in Leptoplana tremellaris. o hatched four-eyed juvenile of Leptoplana tremellaris. Scale bars: 2a–c, 2e–m: 5 mm; 2d, 2n–o: 100 microns.

FIGURE 2 in An updated species checklist for free-living marine nematodes from the world's largest mangrove ecosystem, Sundarbans

FIGURE 2. New distributional records of free-living marine nematodes from Indian Sundarbans a) Halalaimus filicollis b) H. longistriatus c) Ptycholaimellus macrodentatus d) Microlaimus longispiculum e) Dorylaimopsis timmi f) Daptonema timmi

FIGURE 1 in An updated species checklist for free-living marine nematodes from the world's largest mangrove ecosystem, Sundarbans

FIGURE 1. Aerial photograph of Sundarbans mangroves ecoregion along with sampling points (circle—Timm's 1956–1968; square—Sinha et al. 1987; triangle—present study) across major rivers considered for data aggregation as part of this study

FIGURE 9 in Free-living nematodes of the genus Syringolaimus de Man, 1888 (Nematoda, Enoplida, Ironidae) from the Angola Basin, South-East Atlantic Abyss

FIGURE 9. Syringolaimus elegans sp. n. posterior body. A: holotype male, tail; B: holotype male, spicules and precloacal region; C: juvenile, tail. Scale bars: A, C = 100 µm, B = 20 µm.

FIGURE 8 in Free-living nematodes of the genus Syringolaimus de Man, 1888 (Nematoda, Enoplida, Ironidae) from the Angola Basin, South-East Atlantic Abyss

FIGURE 8. Syringolaimus elegans sp. n., anterior body. A: holotype male, anterior end; B: juvenile, anterior end. C: holotype male, pharyngeal region. Scale bars: A–B = 20 µm; C = 100 µm.

FIGURE 5. Syringolaimus smolae. A in Free-living nematodes of the genus Syringolaimus de Man, 1888 (Nematoda, Enoplida, Ironidae) from the Angola Basin, South-East Atlantic Abyss

FIGURE 5. Syringolaimus smolae. A: head of a male; B: head of a female; C: pharyngeal region of a male. Scale bars: A–B = 20 µm; C = 50 µm.

FIGURE 2. Syringolaimus annae. A in Free-living nematodes of the genus Syringolaimus de Man, 1888 (Nematoda, Enoplida, Ironidae) from the Angola Basin, South-East Atlantic Abyss

FIGURE 2. Syringolaimus annae. A: male, entire body; B: female, entire body; C: male, anterior end; D: female, anterior end. Scale bars: A–B = 200 µm; C–D = 20 µm.

FIGURE 1 in Free-living nematodes of the genus Syringolaimus de Man, 1888 (Nematoda, Enoplida, Ironidae) from the Angola Basin, South-East Atlantic Abyss

FIGURE 1. Male tails of Syringolaimus species arranged from top to bottom with increasing of relative length (expressed in c- index); tail shape is expressed in ratio of anterior conical and posterior cylindrical portions.

FIGURE 7 in Free-living nematodes of the genus Syringolaimus de Man, 1888 (Nematoda, Enoplida, Ironidae) from the Angola Basin, South-East Atlantic Abyss

FIGURE 7. Syringolaimus elegans sp. n., entire. A: holotype male; B: paratype juvenile. Scale bars: A–B = 500 µm.

FIGURE 3. Syringolaimus annae. A in Free-living nematodes of the genus Syringolaimus de Man, 1888 (Nematoda, Enoplida, Ironidae) from the Angola Basin, South-East Atlantic Abyss

FIGURE 3. Syringolaimus annae. A: male, anterior body; B: female, anterior body; C: male, tail; D: female, tail; E: male, pericloacal region. Scale bars: A–E = 50 µm.

FIG. 2 in Three new species of free-living nematodes from the Bohai Sea, China

FIG. 2. Pictorial key to species of Setosabatieria. (a) S. hilarula; (b) S. fibulata; (c) S. jingjingae. Bar scales: heads =10 µm, tails=30 µm for (a) and (b); head = 10 µm, tail = 10 µm for (c). (a) and (b) from Platt (1985).

FIG. 1 in Three new species of free-living nematodes from the Bohai Sea, China

FIG. 1. Setosabatieria jingjingae sp. nov. (a) Lateral view of female head-end; (b) lateral view of male head-end; (c) lateral view of male head and oesophageal region; (d) lateral view of female tail; (e) lateral view of male tail-end; (f) lateral view of male copulatory apparatus. Bar scales: 10 µm.

FIG. 4 in Three new species of free-living nematodes from the Bohai Sea, China

FIG. 4. Belbolla zhangi sp. nov. (a) Lateral view of male head-end; (b) lateral view of male head and oesophageal region; (c) lateral view of male copulatory apparatus; (d) lateral view of female tail; (e) lateral view of male tail-end. Bar scales: 10 µm for (a) and (c); 50 µm for (b), (d) and (e).

FIG. 3 in Three new species of free-living nematodes from the Bohai Sea, China

FIG. 3. Amphimonhystera circula sp. nov. (a) Lateral view of male head-end; (b) lateral view of tail-end. Bar scales:10 µm.

Figure 7 in Free-living calamyzin chrysopetalids (Annelida) from methane seeps, anoxic basins, and whale falls

Figure 7. Micospina auribohnorum gen. et sp. nov. Line drawing, Costa Rican specimen SIO-BIC A1934: A, anterior body dorsal view; B, anterior body ventral view. Abbreviations: I, cirri of segment I; II, parapodia and cirri of segment II; III, parapodia of segment III; la, lateral antennae; mp, mouth papillae; p, palp.

Figure 6 in Free-living calamyzin chrysopetalids (Annelida) from methane seeps, anoxic basins, and whale falls

Figure 6. Micospina auribohnorum gen. et sp. nov. SEM, Costa Rican specimens SIO-BIC A1599: A, anterior body, dorsal; Dorsal view B, notochaetae; C, anterior end, anteroventral view, arrow indicates nuchal organ; D, neurochaetal blade detail; E, neurochaetal bifid joint detail. Abbreviations: I, cirri of segment I; II, parapodia and cirri of segment II; III, parapodia of segment III; IV, parapodia of segment IV; c, cilia; dc1, dorsal cirrus segment I; e, oocytes; la, lateral antennae; mp, mouth papillae; p, palps; pl, prechaetal lobe.

Figure 9 in Free-living calamyzin chrysopetalids (Annelida) from methane seeps, anoxic basins, and whale falls

Figure 9. Boudemos flokati gen. et comb. nov., California, adult specimen LACM 2781: A, anterior-body dorsal and ventral parapodium; B, detail of anterior segments I–III, left side, ventral view; C, superior neurochaeta; D, mid-group neurochaeta. Abbreviations: I–III, segments 1–3; dc, dorsal cirrus; vc, ventral cirrus. Boudemos ardabilia gen. et comb. nov., Skagerrak, adult specimen NHM 2008.367: E, ovigerous female, mid-body dorsal and ventral parapodium; F, neurochaetae detail. Abbreviations: bs, bifid shaft; dc, dorsal cirrus; e, oocytes; pl, prechaetal lobe; vc, ventral cirrus.

Figure 5 in Free-living calamyzin chrysopetalids (Annelida) from methane seeps, anoxic basins, and whale falls

Figure 5. Micospina auribohnorum gen. et sp. nov. Live adults. A, B, San Diego, holotype SIO-BIC A3641, ovigerous female: A, entire body; B, detail anterior end. C–E, Costa Rica, SIO-BIC A1427: C, D, ovigerous female; E, male. Abbreviations: dc1, dorsal cirrus segment I; e, oocytes; la, lateral antennae; pc, pygidial cirri; py, pygidium; s, sperm.

Figure 4 in Free-living calamyzin chrysopetalids (Annelida) from methane seeps, anoxic basins, and whale falls

Figure 4. Vigtorniella zaikai. Line drawings, adult, NTM W.25871. A, anterior end, ventral view. B, jaw detail. C, mid-- body notochaetal fascicle. D, notochaetal detail. E, superior neurochaeta. F–H, mid and lower neurochaetae. I, spinigerous whip-like neurochaeta, segment II. Abbreviations: I, cirri of segment I; II, cirri and neuropodia of segment II; III, parapodia of segment III; j, jaws; la, lateral antennae; mp, mouth papillae; p, palp.