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48 results for “Theodoxus”
FIG. 4 in A neritid gastropod name "Theodoxus dniestroviensis Put', 1972" is a junior subjective synonym of Th. fluviatilis (L., 1758): decision based on the topotypic specimens study
FIG. 4. Shells of Theodoxus fluviatilis (Linnaeus, 1758). A–C. Three topotypes of "Theodoxus dniestroviensis", NMNH NASU, PD, no number, locality 1. D. Lectotype of Th. dniestroviensis, designated here, locality 1, photo reproduced after Put', 1972. E. Specimen from Seret River, IZAN #614, locality 2. F. Specimen from Hnizna River, IZAN #616, locality 4. G. Specimen from Strypa River, IZAN #615, locality 3. H, I. Specimens from Dniester River, IZAN #333, locality 6. K. Specimen from Dniester River, IZAN #335, locality 5. L. Th. obliteratus-morphotype, ZIN #5912/1, locality 7. M. Lectotype of Th. lacrymans-morphotype, ZIN #6052/1, locality 8. N. Lectotype of Th. alboguttatus-morphotype, ZIN #6051/1, locality 8. O. Lectotype of Th. pulcherrimus-morphotype, ZIN #6053/1, locality 8. L–O. Reproduced after V. Anistratenko et al., 2020. РИС. 4. Theodoxus fluviatilis (Linnaeus, 1758). A –C. Топотипы "Theodoxus dniestroviensis", NMNH NASU, PD, беЗ номера, локалитет 1. D. Лектотип Th. dniestroviensis, обоЗначен Здесь, локалитет 1, фото воспроиЗведено по Put', 1972. E. ЭкЗемпляр иЗ р. Серет, IZAN #614, локалитет 2. F. ЭкЗемпляр иЗ р. ГниЗна, IZAN #616, локалитет 4. G. ЭкЗемпляр иЗ р. Стрыпа, IZAN #615, локалитет 3. H, I. ЭкЗемпляры иЗ р. Днестр, IZAN #333, локалитет 6. K. ЭкЗемпляр иЗ р. Днестр, IZAN #335, локалитет 5. L. Морфотип Th. obliteratus, ZIN #5912/1, локалитет 7. M. Лектотип морфотипа Th. lacrymans, ZIN #6052/1, локалитет 8. N. Лектотип морфотипа Th. alboguttatus, ZIN #6051/1, локалитет 8. O. Лектотип морфотипа Th. pulcherrimus, ZIN #6053/1, локалитет 8. L–O. ВоспроиЗведены по V. Anistratenko et al., 2020.
FIG. 3 in A neritid gastropod name "Theodoxus dniestroviensis Put', 1972" is a junior subjective synonym of Th. fluviatilis (L., 1758): decision based on the topotypic specimens study
FIG. 3. Selected ecotopes of the Dniester River near Monastyrok village, locality 6 (A, B) and Halych village, locality 5 (C, D). Photo E. Degtyarenko. РИС. 3. Некоторые Экотопы р. Днестр воЗле с. Монастырок, локалитет 6 (A, B) и с. Галич, локалитет 5 (C, D). Фото Е. Дегтяренко.
FIG. 1 in A neritid gastropod name "Theodoxus dniestroviensis Put', 1972" is a junior subjective synonym of Th. fluviatilis (L., 1758): decision based on the topotypic specimens study
FIG. 1. Map of the study area with indication of sampling points of Theodoxus. The numbers of localities correspond to those in the Table 1. РИС. 1. Карта иЗученного региона с укаЗанием точек сбора Theodoxus. Номера локалитетов соответствуют таковым в Табл. 1.
FIG. 2 in A neritid gastropod name "Theodoxus dniestroviensis Put', 1972" is a junior subjective synonym of Th. fluviatilis (L., 1758): decision based on the topotypic specimens study
FIG. 2. Some lots of river nerites collected by A.L. Put' on May 26, 1950 from the Dniester River near Rukhotyn village, the type locality of "Theodoxus dniestroviensis" (Fig. 1, locality 1). РИС. 2. Некоторые пробы лунок, собранные А.Л. Путем 26 мая 1950 года иЗ р. Днестр воЗле с. Рухотин, типового местонахоЖдения "Theodoxus dniestroviensis" (Рис. 1, локалитет 1).
Figures 10-16. Theodoxus meridionalis. 10-15 in On the identity of Neritina baetica Lamarck, 1822 and Nerita meridionalis Philippi, 1836 (Gastropoda: Neritidae) from the Iberian Peninsula
Figures 10-16. Theodoxus meridionalis. 10-15: Syntypes of Theodoxus meridionlis (Philippi, 1836), 16: original lable.
Figure 5 in Old lake versus young taxa: a comparative phylogeographic perspective on the evolution of Caspian Sea gastropods (Neritidae: Theodoxus )
Figure 5. EBSPs indicating population trends for the pooled Pontocaspian (blue) and southern Iranian (red) Theodoxus groups. The central line of each plot represents the median value and the shaded area indicates the 95% confidence interval. Note the EBSPs depict marginally different starting dates for each group when compared with the phylogeny. Importantly, however, there is a strong overlap of EBSP starting dates with the 95% HPDs established for the onset of intraspecific diversification in each group, as shown in the phylogeny (figure 3).
Figure 1 in Old lake versus young taxa: a comparative phylogeographic perspective on the evolution of Caspian Sea gastropods (Neritidae: Theodoxus )
Figure 1. Representative phenotypes of the Pontocaspian and southern Iranian Theodoxus species studied herein. Pontocaspian: (a,b) T. pallasi (UGSB 20712); (c,d) T. astrachanicus (UGSB 18130); (e,f) T. pallasi (UGSB 18091); (g,h) T. major (UGSB 20482); (i,j) T. major (UGSB 20496); (k,l) T. schultzii (UGSB 20791). Southern Iranian: (m,n) T. doriae (UGSB 21706); (o,p) T. pallidus (UGSB 22228). Scale bar, 1 mm.
Figure 4. Statistical haplotype networks for COI, 16S in Old lake versus young taxa: a comparative phylogeographic perspective on the evolution of Caspian Sea gastropods (Neritidae: Theodoxus )
Figure 4. Statistical haplotype networks for COI, 16S and ATPα sequence data for Pontocaspian and southern Iranian Theodoxus groups. The total number of sequences in each network is demarcated by 'n'. The circle sizes represent the relative frequency of sequences per haplotype. The number of site changes separating haplotypes is indicated by blank dots. Colours correspond to the sampling locations, as indicated in the key and in figure 2. Haplotype groupings are boxed and labelled according to the phylogroups determined through the dated phylogeny (I–VI; figure 3).
Figure 2 in Old lake versus young taxa: a comparative phylogeographic perspective on the evolution of Caspian Sea gastropods (Neritidae: Theodoxus )
Figure 2. Map depictingthelocationsof thesamplingsitesaround the Pontocaspiansystemandsouthern Iran. Coloursof dots correspond to the locations, as indicated in the key. Dashed lines encircle (I) the Pontocaspian and (II) the southern Iranian Theodoxus sampling localities. The size of the dots represents the sample size at each location (larger = 10 specimens; smaller = 5 specimens).
Figure 3 in Old lake versus young taxa: a comparative phylogeographic perspective on the evolution of Caspian Sea gastropods (Neritidae: Theodoxus )
Figure 3. Dated phylogeny of Pontocaspian and southern Iranian Theodoxus spp. constructed in BEAST based on COI, 16S and ATPα sequence data. Supported phylogroups of Pontocaspian and southern Iranian Theodoxus are labelled Ito VI. Node labels among these phylogroups and outgroup species denote divergence time in millions of years ago (Ma), with the 95% credibility interval given in parentheses and as grey bars for in-group taxa. Small red squares at nodes (with darkened node bars and, in some instances, dates) indicate significant posterior probabilities of divergence events. Parallel to each supported phylogroup, coloured bars indicate the localities and respective morphospecies of the included specimens as defined in the key on the left. Caspian Sea lake-level variations over the last 1.5 million years (relative to absolute sea level) and regional stratigraphy (following the 'short–Akchagylian' option) are adapted from Krijgsman et al. [1] (Khv., Khvalynian).
Expression levels and activities of energy-yielding ATPases in the oligohaline neritid snail Theodoxus fluviatilis under changing environmental salinities
<p>The aquatic gastropod Theodoxus fluviatilis occurs in Europe and adjacent areas of Asia. The snail species has formed two genetically closely related subgroups, the freshwater ecotype (FW) and the brackish water ecotype (BW). Other than individuals of the FW ecotype, those of the BW ecotype survive in salinities of up to 28‰. Coastal aquatic ecosystems may be affected by climate change due to salinization. Thus, we investigated how the two Theodoxus ecotypes adjust to changes in environmental salinity focussing on the question whether Na+ /K+ -ATPase or V-ATPase are regulated on the transcriptional, the translational or at the activity level under changing external salinities. Animals were gradually adjusted to extreme salinities in containers under long-day conditions and constant temperature. Whole body RNA- or protein extracts were prepared. Semi-quantitative PCR and Western Blot-analyses did not reveal major changes in transcript or protein abundances for the two transporters under low or high salinity conditions. No significant changes in ATPase activities in whole body extracts of animals adjusted to high or low salinity conditions were detected. We conclude that constitutive expression of ATPases is sufficient to support osmotic and ion regulation in this species under changing salinities given the high level of tolerance with respect to changes in body fluid volume.</p>
Expression levels and activities of energy-yielding ATPases in the oligohaline neritid snail Theodoxus fluviatilis under changing environmental salinities
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FIG UR E 3 (a) Dated phylogeny of the genus Theodoxus constructed in BEAST based on COI, 16S and ATPα. Node labels denote divergence times in millions of years ago (Ma); node bars indicate the 95% credibility interval around these dates. Small squares at nodes indicate significant support of divergence events found with BEAST and other phylogenetic analyses (see Figures S2.1 and S2.2), as explained through the key. Where MOTUs (A–R) show conspecifics among a number of morphospecies, species names are given in order of their year of description. Morphospecies, incorporated from GenBank, where determination was potentially dubious are highlighted by an asterisk. Clades (C) and subclades (SC) are demarcated by dashed lines between MOTUs. (b) LTT plots indicating the build‐up of lineages in Theodoxus over geological time. Dashed lines surrounding the solid LTT lines indicate the 95% confidence intervals. Where intra‐ and interspecific diversity diverge, interspecific diversity is highlighted in blue and intraspecific diversity in red. Transitions in geological ages are highlighted by narrow grey lines, while the grey bar marks the period of pronounced glacial cycles (last 900 kyr) [Colour figure can be viewed at wileyonlinelibrary.com] in Contributions of biogeographical functions to species accumulation may change over time in refugial regions
FIG UR E 3 (a) Dated phylogeny of the genus Theodoxus constructed in BEAST based on COI, 16S and ATPα. Node labels denote divergence times in millions of years ago (Ma); node bars indicate the 95% credibility interval around these dates. Small squares at nodes indicate significant support of divergence events found with BEAST and other phylogenetic analyses (see Figures S2.1 and S2.2), as explained through the key. Where MOTUs (A–R) show conspecifics among a number of morphospecies, species names are given in order of their year of description. Morphospecies, incorporated from GenBank, where determination was potentially dubious are highlighted by an asterisk. Clades (C) and subclades (SC) are demarcated by dashed lines between MOTUs. (b) LTT plots indicating the build‐up of lineages in Theodoxus over geological time. Dashed lines surrounding the solid LTT lines indicate the 95% confidence intervals. Where intra‐ and interspecific diversity diverge, interspecific diversity is highlighted in blue and intraspecific diversity in red. Transitions in geological ages are highlighted by narrow grey lines, while the grey bar marks the period of pronounced glacial cycles (last 900 kyr) [Colour figure can be viewed at wileyonlinelibrary.com]
Data from: Old lake vs. young taxa: a comparative phylogeographic perspective on the evolution of Caspian Sea gastropods (Neritidae: Theodoxus)
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Supplementary material 1 from: Sands AF, Glöer P, Gürlek ME, Albrecht C, Neubauer TA (2020) A revision of the extant species of Theodoxus (Gastropoda, Neritidae) in Asia, with the description of three new species. Zoosystematics and Evolution 96(1): 25-66. https://doi.org/10.3897/zse.96.48312
: Data type: species data
Figure 8 from: Sands AF, Glöer P, Gürlek ME, Albrecht C, Neubauer TA (2020) A revision of the extant species of Theodoxus (Gastropoda, Neritidae) in Asia, with the description of three new species. Zoosystematics and Evolution 96(1): 25-66. https://doi.org/10.3897/zse.96.48312
Figure 8 Theodoxus baeticus (Lamarck, 1822). A–D. Specimen from Cuquillo, Granada, Andalusia, Spain (UGSB 22089); E–H. Specimen (T. meridionalis-morphotype) collected in the Palancia River, Navajas, Spain (UGSB 22090); I–L. Specimen (T. elongatulus-morphotype) from Arrancada, Pombal, Portugal (UGSB 22080); M–P. Specimen (T. velascoi-morphotype) from Montanejos, Castellón, Spain (UGSB 22082). Theodoxus cf. valentinus (Graells, 1846). Q–S. Specimen conforming to T. valentinus from the Verd River, Masalavés, Spain (UGSB 21787); T. Operculum of a specimen conforming to T. valentinus from the same locality as Q–S (UGSB 22087). All specimens, except Q–S, were used in the phylogeny (Fig. 2). Scale bars: 1 mm.
Figure 9 from: Sands AF, Glöer P, Gürlek ME, Albrecht C, Neubauer TA (2020) A revision of the extant species of Theodoxus (Gastropoda, Neritidae) in Asia, with the description of three new species. Zoosystematics and Evolution 96(1): 25-66. https://doi.org/10.3897/zse.96.48312
Figure 9 Theodoxus fluviatilis (Linnaeus, 1758). A–D. Specimen collected close to Oued Laabid, Morocco (UGSB 18106) (Fig. 2); E–H. Specimen from the Danube River, Wörth an der Donau, Germany (UGSB 24173); I–L. Specimen (T. euxinus-morphotype) collected in the Papuç Creek, Kıyıköy, Turkey (UGSB 24172) (Fig. 2); M–P. Specimen (T. euxinus-morphotype) from Ovidiopol, Ukraine (UGSB 18124); Q–S. Specimen (T. heldreichi-morphotype) collected in Lake Eğirdir, Turkey (UGSB 20361); T, U. Specimen (T. danasteri-morphotype) collected in Krasna Kosa, Ukraine (UGSB 18417) (Fig. 2); V. Opercula of a T. danasteri-morphotype from Lake Skadar, Montenegro (UGSB 24171). Specimens A–D, I–L and T–U were used in the phylogeny (Fig. 2). Scale bars: 1 mm.
Figure 6 from: Sands AF, Glöer P, Gürlek ME, Albrecht C, Neubauer TA (2020) A revision of the extant species of Theodoxus (Gastropoda, Neritidae) in Asia, with the description of three new species. Zoosystematics and Evolution 96(1): 25-66. https://doi.org/10.3897/zse.96.48312
Figure 6 Theodoxus baeticus (Lamarck, 1822). A–C. Paralectotype of N. baetica from Andalusia, Spain (MHNG-MOLL-51319). D) Operculum of a paralectotype of N. baetica from Andalusia (MHNG-MOLL-51319); E–G. Lectotype of N. baetica from Andalusia (MHNG-MOLL-51319); H–J; K; L; M; N. Five syntypes of N. meridionalis from Sicily (ZMB, without coll. no.); O–R. Topotype of N. guadianensis collected in the Guadiana River near Mértola, Portugal incorporated into the phylogeny (UGSB 22084); S–V. Specimen from Sóller, Balearic Islands used in the phylogeny (UGSB 19162). Scale bars: 1 mm.
Figure 5 from: Sands AF, Glöer P, Gürlek ME, Albrecht C, Neubauer TA (2020) A revision of the extant species of Theodoxus (Gastropoda, Neritidae) in Asia, with the description of three new species. Zoosystematics and Evolution 96(1): 25-66. https://doi.org/10.3897/zse.96.48312
Figure 5 Theodoxus anatolicus (Récluz, 1841). A–D. Specimen collected at Işıklı, Denizli, Turkey (UGSB 24168) incorporated into the phylogeny (Fig. 2); E–G. Lectotype of N. anatolica from Izmir, Turkey (MHNG-MOLL-15028). H, I. Paralectotype of N. anatolica from Izmir, Turkey (MHNG-MOLL-15028); J, K. Paralectotype of N. anatolica from Chios, Greece (MNHN-IM-2000-32519); L, M. Syntype of N. belladonna from Izmir, Turkey (ZMZ 528908). Scale bars: 1 mm.
Figure 7 from: Sands AF, Glöer P, Gürlek ME, Albrecht C, Neubauer TA (2020) A revision of the extant species of Theodoxus (Gastropoda, Neritidae) in Asia, with the description of three new species. Zoosystematics and Evolution 96(1): 25-66. https://doi.org/10.3897/zse.96.48312
Figure 7 Theodoxus baeticus (Lamarck, 1822). A–D. Specimen (T. callosus-morphoype) collected in Akyaka, Turkey (UGSB 19118); E–H. Specimen (T. callosus-morphotype) collected in Káto Tragána, Greece (UGSB 2488); I–L. Specimen (T. varius-morphotype) collected at the Blue Eye Nature Monument, Albania (UGSB 24170); M–P. Specimen (T. meridionalis-morphotype) collected at the Ketana Oasis, Gabes, Tunisia (UGSB 18111). All specimens, except A–H, were used in the phylogeny (Fig. 2). Scale bars: 1 mm.
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