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13 results for “Basommatophora”
Fig. 3a-j in Physico-chemical characteristics of habitats colonized by the pond snail Radix labiata (Gastropoda, Basommatophora, Lymnaeidae): a model approach
Fig. 3a-j: Graphical presentation of essential parameters associated with logistic regression: white vertical line: position of the maximum probability of occurrence (xmax), black bar: optimum range of the given variable, grey-shaded area: range of the given variable that is still tolerated by the species; a) water temperature, b) pH, c) electric conductivity, d) oxygen content in the water, e) nitrate concentration in the water, f) water depth, g) biological oxygen demand within five days, h) content of ammonium nitrogen, i) geographic altitude, j) current velocity.
Fig. 1 in Physico-chemical characteristics of habitats colonized by the pond snail Radix labiata (Gastropoda, Basommatophora, Lymnaeidae): a model approach
Fig. 1: General habitus of the shell of R. labiata as well as the living animal: a) Front view of the shell (height: 1.4 cm, width: 0.75 cm), b) back view of the shell, c) living animal with its typical triangular tentacles.
Fig. 2a-j in Physico-chemical characteristics of habitats colonized by the pond snail Radix labiata (Gastropoda, Basommatophora, Lymnaeidae): a model approach
Fig. 2a-j: Results of the logistic regression procedure carried out for ten environmental variables: a) water temperature, b) pH, c) electric conductivity, d) oxygen content in the water, e) nitrate concentration in the water, f) water depth, g) biological oxygen demand within five days, h) content of ammonium nitrogen, i) geographic altitude, j) current velocity.
Fig. 3 in Haplotype variation in the Physa acuta group (Basommatophora): genetic diversity and distribution in Serbia Abstract
Fig. 3: Haplotype networks from 43 Physa acuta group specimens, obtained using statistical parsimony (TCS). Circles represent specific haplotypes; the size of the circles reflects the number of individuals with a particular haplotype (not to scale); the dots between the circles represent mutational steps.
Fig. 2 in Haplotype variation in the Physa acuta group (Basommatophora): genetic diversity and distribution in Serbia Abstract
Fig. 2: Phylogenetic trees based on mt16S rDNA, obtained using the Maximum Likelihood (ML) method. Bootstrap values are indicated below the branches. Scale bar indicates the number of substitutions per site.
FIGURE 7 in A new species of Gerstfeldtiancylus Starobogatov, 1989 (Pulmonata: Basommatophora: Acroloxidae) from Lake Baikal
FIGURE 7. Egg masses of Gerstfeldtiancylus ushunensis, sp. nov.. A–C. Lateral and dorsal view (going from top to bottom). cam, capsular albuminous matrix; cm, capsular membrane; emb, embryo; et, extrasyncapsular tunic; sm, syncapsular matrix; stu, syncapsular tunic; tt, terminal tail. All scale bars: 2 mm.
FIGURE 4 in A new species of Gerstfeldtiancylus Starobogatov, 1989 (Pulmonata: Basommatophora: Acroloxidae) from Lake Baikal
FIGURE 4. Radula of Gerstfeldtiancylus ushunensis, sp. nov. (SEM). A–C. ZIN RAS 2/521–2006: A. Central tooth. B. Three transverse rows of teeth. C. Lateral teeth. Scale bars: A = 0.01 mm; B–C = 0.1 mm.
FIGURE 5. A–B in A new species of Gerstfeldtiancylus Starobogatov, 1989 (Pulmonata: Basommatophora: Acroloxidae) from Lake Baikal
FIGURE 5. A–B. Anatomy of Gerstfeldtiancylus ushunensis, sp. nov.. А. General topography of main organs of the alimentary system, dorsal view. Digestive gland removed. B. Dorsal view of specimen without shell. C–D. Odontophore of G. ushunensis, sp. nov.. E–L. Jaws of different Gerstfeldtiancylus species. E–H. G. ushunensis, sp. nov. (A, C–E. ZIN RAS 1/521–2006. B, F–H. ZIN RAS 2/521–2006). I. G. renardii (Dybowski, 1884). J. G. roepstorfi Shirokaya et al., 2003. K. G. benedictiae Starobogatov, 1989 (whole mounts in Faure-Berlezet liquid). L. G. kotyensis Starobogatov, 1989 (frontal histological section). I–L. From Shirokaya & Röpstorf (2004). aal, left anterior adductor; aar, right anterior adductor; ap, anal pore; bm, buccal mass; cae, caecum; dgp, digestive gland pores; int1, first intestinal loop; int2, second intestinal loop; mb, mantle border; oa, original or posterior adductor; oe, oesophagus; rs, radular sac; sg, salivary glands; st, stomach. Scale bars: A–D = 1 mm; E = 0.8 mm; F–H, J = 0.5 mm; I, K–L = 0.3 mm.
FIGURE 2 in A new species of Gerstfeldtiancylus Starobogatov, 1989 (Pulmonata: Basommatophora: Acroloxidae) from Lake Baikal
FIGURE 2. Measurements of acroloxid shells (after Kruglov & Starobogatov (1991b), modified). L, length of aperture; La, distance from apex to frontal apertural edge (projected on longitudinal axis of aperture); W, width of aperture; wL, distance from apex to left apertural edge; a, chord of anterior (maximal) slope; H, height of teleoconch; l, length of protoconch; w, width of protoconch; h, height of protoconch.
FIGURE 1 in A new species of Gerstfeldtiancylus Starobogatov, 1989 (Pulmonata: Basommatophora: Acroloxidae) from Lake Baikal
FIGURE 1. Schematic maps of Lake Baikal. A. Geographical regions of four shallow-water (0–100 m) provinces. The boundaries of the provinces and regions are indicated according to Starobogatov (1970), modified by Sitnikova (2006). Regions: South-Baikal (SB), Anginsky (ANG), Malomorsky (М), East-Olkhon (EOL), Turkinsky (TUR), Barguzin- Chivyrkuysky (BCH), North-Baikal, eastern coast (NBE), North-Baikal, western coast (NBW), Ushkansky (USH). B. Localities of abundant species of Gerstfeldtiancylus Starobogatov, 1989. Symbols same as in C. C. Localities of species occupying disjunctive and local areas. 1. G. benedictiae Starobogatov, 1989. 2. G. re n a rd i i (Dybowski, 1884). 3. G. k o t y - ensis Starobogatov, 1989. 4. G. ushunensis, sp. nov.. 5. G. roepstorfi Shirokaya et al., 2003. B–C. From Shirokaya (2004, 2005).
FIGURE 3 in A new species of Gerstfeldtiancylus Starobogatov, 1989 (Pulmonata: Basommatophora: Acroloxidae) from Lake Baikal
FIGURE 3. Shells of Gerstfeldtiancylus ushunensis, sp. nov. (SEM). A–D. Teleoconch (ZIN RAS 1/521–2006): A. Top view. B. Right side view. C. Left side view. D. Rear view. E–G. Protoconch (LIN SB RAS 905): E. Top view. F. Right side view. G. Left side view. H. Initial protoconch plate. I–K. Protoconch sculpture (LIN SB RAS 904). Scale bars: A–D = 2.0 mm; E = 1.0 mm; F–G = 0.25 mm; H, J = 0.1 mm; I = 0.2 mm; K = 0.02 mm.
FIGURE 6 in A new species of Gerstfeldtiancylus Starobogatov, 1989 (Pulmonata: Basommatophora: Acroloxidae) from Lake Baikal
FIGURE 6. Longitudinally sectioned male copulatory organ of Gerstfeldtiancylus species (A–D, G. diagrammic). A. G. benedictiae Starobogatov, 1989. B, E. G. roepstorfi Shirokaya et al., 2003. C. G. kotyensis Starobogatov, 1989. D. G. renardii (Dybowski, 1884). A–E. From Kruglov & Starobogatov (1991a), Shirokaya (2005). F–G. G. ushunensis, sp. nov. (ZIN RAS 2/521–2006). fl, flagellum; mp, male genital pore; p, penis; ps, penis sheath; psr, penis sheath retractor; pr, preputium; prc, preputium chamber; prp, preputium pilasters; sar, sarcobellum; vd, vas deferens; ve, velum. Scale bars: A = 0.5 mm; B–G = 1 mm.
Fig. 1 in Haplotype variation in the Physa acuta group (Basommatophora): genetic diversity and distribution in Serbia Abstract
Fig. 1: Distribution of P. acuta group in Canada, North America, Mexico and Cuba (A), Europe (B) and Serbia (C). Distribution of P. acuta in North and Central America (white circles) was compiled from the data of Wethington et al. (2009), Wethington & Guralnick (2004) and Kraus et al. (2014). The European (white circles) range is based on Wethington & Lydeard (2007), data and distribution in Serbia is based on Novaković (2014, black circles), and on our field sampling data (white circles).
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