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Fig. 2 in Positive association between PTN polymorphisms and schizophrenia in Northeast Chinese Han population.

Fig. 2. Synoptic illustration of mantle extensions of the genus Durgella. A, B: four mantle extensions with left dorsal lobe undivided. C, D: five mantle extensions with left dorsal lobe divided into anterior and posterior left dorsal lobes. White arrow indicates pneumostome or breathing pore.

Fig. 7 in Fig. 1 in Positive association between PTN polymorphisms and schizophrenia in Northeast Chinese Han population.

Fig. 7. Generalized Additive Models (GAMs) showing relationships between square rooted abundance of the species and explanatory variables. Only significant relationships with unimodal distributions are shown. Abbreviation: Dev. expl., Deviance explained, i.e., a variable showing variance explained by GAMs. Shaded stripes indicate 95% confidence interval.

Fig. 6 in Fig. 1 in Positive association between PTN polymorphisms and schizophrenia in Northeast Chinese Han population.

Fig. 6. Classification tree for the occurrence of a) V. lilljeborgi, b) V. genesii and c) V. geyeri at 327 sites. Numbers at each node indicate that the species was: absent/low population density/high population density, respectively. See Materials and Methods for details. The major splitter predictor and its split values are in bold whereas surrogates (i.e., predictors that distribute at least 90% of the cases to the same group as the primary splitter) are below the major splitter. Numbers in black circles indicate the number of splits. Photographs: Radovan Coufal (live individuals), Michal Horsák (shells).

Fig. 6 in Positive association between PTN polymorphisms and schizophrenia in Northeast Chinese Han population.

Fig. 6. Genitalia of Durgella species. A: D. birmanica CUMZ 14233. B, C: D. levicula CUMZ 14253; B: general view of the genital system; C internal structure of the penis and epiphallus. White arrow indicates the end of the penis.

Fig. 5 in Fig. 1 in Positive association between PTN polymorphisms and schizophrenia in Northeast Chinese Han population.

Fig. 5. Variation of analysed environmental predictors using box and whisker plots. Letters above boxplots indicate homogeneous/heterogeneous groups (Kruskal-Wallis test followed by Dunn post hoc texts). The central line of each boxplot refers to the median value, the box delineates the first and third quartiles, whiskers refer to the non-outlier values and asterisks indicate outliers.

Fig. 1 in Positive association between PTN polymorphisms and schizophrenia in Northeast Chinese Han population.

Fig. 1. Map of Thailand and Myanmar showing the geographic distribution of eight species of Durgella based on the specimens examined herein. Only D. rhaphiellus is not shown on the map, as its type locality of "Siam" [Thailand] is too imprecise.

Fig. 9 in Positive association between PTN polymorphisms and schizophrenia in Northeast Chinese Han population.

Fig. 9. Microsculpture of Durgella shells: protoconch and early teleoconch (first column), and close-up view of protoconch (second column). A, B: D. birmanica CUMZ 14233. C, D: D. levicula CUMZ 14251. E, F: D. erratica CUMZ 14234. G, H: D. siamensis CUMZ 14232.

Fig. 3 in Positive association between PTN polymorphisms and schizophrenia in Northeast Chinese Han population.

Fig. 3. Living snails of seven Durgella species. A: D. birmanica CUMZ 14233. B, C: D. levicula; B: CUMZ 14248; C: CUMZ 14250. D: D. erratica CUMZ 14234. E: D. siamensis CUMZ 14232. F: D. libas CUMZ 14237. G: D. pentata sp. nov. paratype CUMZ 14240. H: D. nulla sp. nov. paratype CUMZ 14228.

Fig. 12 in Fig. 4 in Positive association between PTN polymorphisms and schizophrenia in Northeast Chinese Han population.

Fig. 12. Nemertesia macquariensis sp. nov. A−B, cauline apophyses showing mamelon and nematothecae (A with two mamelons); C−D, fragments of hydrocladia showing division into hydrothecate and ahydrothecate internodes, hydrothecae and nematothecae. Scale bars: A−B, D = 250 μm; C = 500 μm.

Fig. 12 in Positive association between PTN polymorphisms and schizophrenia in Northeast Chinese Han population.

Fig. 12. Shells of Durgella species. A, B: D. libas CUMZ 14236. C, D: D. pentata sp. nov.; C: holotype CUMZ 14239; D: paratype CUMZ 14240. E, F: D. nulla sp. nov.; E: holotype CUMZ 14227; F: paratype CUMZ 14228.

Fig. 17 in Positive association between PTN polymorphisms and schizophrenia in Northeast Chinese Han population.

Fig. 17. Representative SEM images of the radula. A, B: D. libas CUMZ 14238. C, D: D. pentata sp. nov. paratype CUMZ 14240. E, F: D. nulla sp. nov. paratype CUMZ 14228. Yellow arrow indicates the central tooth.

Fig. 16 in Positive association between PTN polymorphisms and schizophrenia in Northeast Chinese Han population.

Fig. 16. Genitalia of Durgella nulla sp. nov. paratype CUMZ 14228. A: general view of the genital system and B: internal structure of the penis and epiphallus. White arrow indicates the end of the penis.

Fig. 11 in Fig. 4 in Positive association between PTN polymorphisms and schizophrenia in Northeast Chinese Han population.

Fig. 11. Nemertesia macquariensis sp. nov.: A, stem fragment showing hydrocladial arrangement; B, stem fragment with cauline apophysis showing mamelon (arrow) and one axillary nematotheca; C, detail of cauline apophysis showing mamelon (arrow); D−G, hydrocladial internodes showing hydrothecae and nematothecae; H, detail of hydrotheca and nematotheca with scooped rim (arrow). Scale bars: A = 200 μm; B, D−G = 100 μm; C, H = 50 μm.

Fig. 10 in Fig. 4 in Positive association between PTN polymorphisms and schizophrenia in Northeast Chinese Han population.

Fig. 10. Hydrodendron sp.: A, internode with hydrotheca; B, detail of primary and secondary hydrothecae; C, internode showing hydrothecae and position of missing nematothecae (arrows); D, accessory hydrotheca. Scale bars: A = 200 μm; B−D = 100 μm.

Fig. 9 in Fig. 4 in Positive association between PTN polymorphisms and schizophrenia in Northeast Chinese Han population.

Fig. 9. Tulpa tulipifera (Allman, 1888): A, hydrotheca and pedicel; B, distal part of hydrotheca showing aperture; C, incomplete gonotheca. Calamphora quadrispinosa Watson, 2003: D, hydrotheca; E, distal part of hydrotheca showing aperture; F, gonotheca. Sertularella sp.: G, stem; H−I, stem fragments showing hydrothecae and origin of branch; J, fragment of stem showing longitudinal striation. Scale bars: A, G = 3 mm; B−F, H−I = 200 μm; J = 100 μm.

Fig. 7 in Fig. 4 in Positive association between PTN polymorphisms and schizophrenia in Northeast Chinese Han population.

Fig. 7. Filellum liberum sp. nov.: A, defensive tubes of coppinia; B−D, gonothecae; E, microbasic eurytele (arrow); F, discharged microbasic eurytele (arrow). Scale bars: A = 200 μm; B−D = 100 μm; E−F = 10 μm.

Fig. 8 in Fig. 4 in Positive association between PTN polymorphisms and schizophrenia in Northeast Chinese Han population.

Fig. 8. Filellum liberum sp. nov.: A−C, hydrothecae; D, part of a coppinia showing gonothecae and defensive tubes. Scale bar = 250 µm.

Fig. 1 in Positive association between PTN polymorphisms and schizophrenia in Northeast Chinese Han population.

Fig. 1. Sampling sites of S. atrumoris sp. nov. and the distribution of S. japonicus in Taiwan based on actual data and published reports (Shao 2023).

Fig. 1 in Fig. 4 in Positive association between PTN polymorphisms and schizophrenia in Northeast Chinese Han population.

Fig. 1. Area of study and location of the sampling stations of the present study (see Table 1 for more details), represented with circles, and those surveyed by Watson (2003), indicated with triangles and white numbers. Table 1. Station data

Fig. 4 in Fig. 4 in Positive association between PTN polymorphisms and schizophrenia in Northeast Chinese Han population.

Fig. 4. Holotypes: A, Acryptolaria seamountensis sp. nov. (NIWA 40133); B, Nemertesia macquariensis sp. nov. (NIWA 40094). Scale bar = 10 mm.