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482 results for “Chiton”
FIG. 15 in Indonesian chitons of the genera Belknapchiton Sirenko, Saito et Schwabe, 2022 and Leptochiton Gray, 1847 (Mollusca: Polyplacophora: Leptochitonidae)
FIG. 15. Leptochiton commandorensis, Banda Sea, Indonesia, 3200 m, size 800 x 630 µm. A. Juvenile from pallial groove of female BL–5.0 mm, dorsal view. B. Dorsal scales and needles of the juvenile. РИС. 15. Leptochiton commandorensis, море Банда, ИндонеЗиЯ, 3200 м, раЗмер 800 x 630 мкм. A. Ювенил иЗ паллиального желобка самки BL-5,0 мм, вид сверху. B. Дорсальные чеШуйки и иглы ювенила.
FIG. 11 in Indonesian chitons of the genera Belknapchiton Sirenko, Saito et Schwabe, 2022 and Leptochiton Gray, 1847 (Mollusca: Polyplacophora: Leptochitonidae)
FIG. 11. Leptochiton commandorensis Banda Sea, Indonesia, 3200 m, BL–13.0 mm. A. Dorsal and ventral scales and marginal needles. B, E. Radula. C. Dorsal scales. D. Dorsal scales and needles. РИС. 11. Leptochiton commandorensis, море Банда, ИндонеЗиЯ, 3200 м, BL–13,0 мм. A. Дорсальные и вентральные чеШуйки и маргинальные иглы. B, E. Радула. C. Дорсальные чеШуйки. D. Дорсальные чеШуйки и иглы.
FIG. 3 in Indonesian chitons of the genera Belknapchiton Sirenko, Saito et Schwabe, 2022 and Leptochiton Gray, 1847 (Mollusca: Polyplacophora: Leptochitonidae)
FIG. 3. Belknapchiton giganteus, Banda Sea, Indonesia, 3200 m, BL–21.0 mm. A. Dorsal scales near suture. B. Radula. РИС. 3. Belknapchiton giganteus, море Банда, ИндонеЗиЯ, 3200 м, BL–21,0 мм. A. Сутуральные иглы и дорсальные чеШуйки. B. Радула.
FIG. 7 in Indonesian chitons of the genera Belknapchiton Sirenko, Saito et Schwabe, 2022 and Leptochiton Gray, 1847 (Mollusca: Polyplacophora: Leptochitonidae)
FIG. 7. Belknapchiton giganteus, Banda Sea, Indonesia, 3200 m, BL–5.0 mm. A. Head valve, dorsal view. B. Valve V, dorsal view. C. Valve VIII, dorsal view. D. Valve IV, ventral view. E. Valve V, tegmentum sculpture in jugal area. F. Tail valve, lateral view. G. Valve V, frontal view. РИС. 7. Belknapchiton giganteus, море Банда, ИндонеЗиЯ, 3200 м, BL–5,0 мм. A. Головной Щиток, вид сверху. B. ПЯтый Щиток, вид сверху. C. Хвостовой Щиток, вид сверху. D. Четвертый Щиток, вид сниЗу. E. ПЯтый Щиток, скульптура тегментума на югальном поле. F. хвостовой Щиток, вид сбоку. G. пЯтый Щиток, вид спереди.
FIG. 4 in Indonesian chitons of the genera Belknapchiton Sirenko, Saito et Schwabe, 2022 and Leptochiton Gray, 1847 (Mollusca: Polyplacophora: Leptochitonidae)
FIG. 4. Belknapchiton giganteus, Banda Sea, Indonesia, 3200 m, BL–10.0 mm. A. Head valve, dorsal view. B. Valve V, dorsal view. C. Valve VIII, dorsal view. D. Valve IV, ventral view. E. Valve V, tegmentum sculpture in jugal area. F. Tail valve, lateral view. G. Valve V, frontal view. РИС. 4. Belknapchiton giganteus, море Банда, ИндонеЗиЯ, 3200 м, BL–10,0 мм. A. Головной Щиток, вид сверху. B. ПЯтый Щиток, вид сверху. C. Хвостовой Щиток, вид сверху. D. Четвертый Щиток, вид сниЗу. E. ПЯтый Щиток, скульптура тегментума на югальном поле. F. хвостовой Щиток, вид сбоку. G. пЯтый Щиток, вид спереди.
FIG. 2 in Indonesian chitons of the genera Belknapchiton Sirenko, Saito et Schwabe, 2022 and Leptochiton Gray, 1847 (Mollusca: Polyplacophora: Leptochitonidae)
FIG. 2. Belknapchiton giganteus, Banda Sea, Indonesia, 3200 m, BL–21.0 mm. A. Valve V, tegmentum sculpture in jugal area. B. Dorsal and ventral scales. C. Valve I, tegmentum sculpture. D. Dorsal scales, marginal needles and ventral scales. РИС. 2. Belknapchiton giganteus, море Банда, ИндонеЗиЯ, 3200 м, BL–21,0 мм. A. ПЯтый Щиток, скульптура тегментума на югальном поле. B. Дорсальные и вентральные чеШуйки. C. Головной Щиток, скульптура тегментума. D. Дорсальные чеШуйки, маргинальные иглы и вентральные чеШуйки.
FIG. 9 in Indonesian chitons of the genera Belknapchiton Sirenko, Saito et Schwabe, 2022 and Leptochiton Gray, 1847 (Mollusca: Polyplacophora: Leptochitonidae)
FIG. 9. Belknapchiton giganteus, Banda Sea, Indonesia, 3200 m, BL–5.0 mm. A, B. Radula. РИС. 9. Belknapchiton giganteus, море Банда, ИндонеЗиЯ, 3200 м, BL–5,0 мм. A, B. Радула.
FIG. 5 in Indonesian chitons of the genera Belknapchiton Sirenko, Saito et Schwabe, 2022 and Leptochiton Gray, 1847 (Mollusca: Polyplacophora: Leptochitonidae)
FIG. 5. Belknapchiton giganteus, Banda Sea, Indonesia, 3200 m, BL–10.0 mm. A. Valve V, tegmentum sculpture in central and lateral areas. B, D. Dorsal scales, marginal needles and ventral scales. C. Valve I, tegmentum sculpture in middle of valve. РИС. 5. Belknapchiton giganteus, море Банда, ИндонеЗиЯ, 3200 м, BL–10,0 мм. A. ПЯтый Щиток, скульптура тегментума на центральном и латеральном полЯх. B, D. Дорсальные чеШуйки, маргинальные иглы и вентральные чеШуйки. C. Головной Щиток, скульптура тегментума.
FIG. 1 in Indonesian chitons of the genera Belknapchiton Sirenko, Saito et Schwabe, 2022 and Leptochiton Gray, 1847 (Mollusca: Polyplacophora: Leptochitonidae)
FIG. 1. Belknapchiton giganteus, Banda Sea, Indonesia, 3200 m, BL–21.0 mm. A. Head valve, dorsal view. B. Valve V, dorsal view. C. Valve VIII, dorsal view. D. Part of valve IV, ventral view. E. Valve V, tegmentum sculpture in central area. F. Tail valve, lateral view. G. Valve V, frontal view. РИС. 1. Belknapchiton giganteus, море Банда, ИндонеЗиЯ, 3200 м, BL–21,0 мм. A. Головной Щиток, вид сверху. B. ПЯтый Щиток, вид сверху. C. Хвостовой Щиток, вид сверху. D. Четвертый Щиток, вид сниЗу. E. ПЯтый Щиток, скульптура тегментума на центральном поле. F. Хвостовой Щиток, вид сбоку. G. ПЯтый Щиток, вид спереди.
FIG. 8 in Indonesian chitons of the genera Belknapchiton Sirenko, Saito et Schwabe, 2022 and Leptochiton Gray, 1847 (Mollusca: Polyplacophora: Leptochitonidae)
FIG. 8. Belknapchiton giganteus, Banda Sea, Indonesia, 3200 m, BL–5.0 mm. A. Tail valve, tegmentum sculpture in antemucronal area. B. Dorsal scales and sutural needles. C. Dorsal and ventral scales and marginal needles. D. Dorsal scales. РИС. 8. Belknapchiton giganteus,,море Банда, ИндонеЗиЯ, 3200 м, BL–5,0 мм. A. Хвостовой Щиток, скульптура тегментума на антемукрональном поле. B. Дорсальные чеШуйки и сутуральные иглы. C. Дорсальные и вентральные чеШуйки и маргинальные иглы. D. Дорсальные чеШуйки.
FIG. 10 in Indonesian chitons of the genera Belknapchiton Sirenko, Saito et Schwabe, 2022 and Leptochiton Gray, 1847 (Mollusca: Polyplacophora: Leptochitonidae)
FIG. 10. Leptochiton commandorensis, Banda Sea, Indonesia, 3200 m, BL–13.0 mm. A. Head valve, dorsal view. B. Valve V, dorsal view. C. Valve VIII, dorsal view. D. Valve IV, ventral view. E. Valve V, tegmentum sculpture in central area. F. Tail valve, lateral view. G. Valve V, frontal view. РИС. 10. Leptochiton commandorensis, море Банда, ИндонеЗиЯ, 3200 м, BL–13,0 мм. A. Головной Щиток, вид сверху. B. ПЯтый Щиток, вид сверху. C. Хвостовой Щиток, вид сверху. D. Четвертый Щиток, вид сниЗу. E. ПЯтый Щиток, скульптура тегментума на центральном поле. F. Хвостовой Щиток, вид сбоку. G. ПЯтый Щиток, вид спереди.
FIG. 13 in Indonesian chitons of the genera Belknapchiton Sirenko, Saito et Schwabe, 2022 and Leptochiton Gray, 1847 (Mollusca: Polyplacophora: Leptochitonidae)
FIG. 13. Leptochiton commandorensis, Banda Sea, Indonesia, 3200 m, BL–5.0 mm. A. Whole specimen, dorsal and lateral views. B. Valve IV, lateral view. C. Valve IV, tegmentum sculpture in lateral area. D. Dorsal and ventral scales. РИС. 13. Leptochiton commandorensis, море Банда, ИндонеЗиЯ, 3200 м, BL–5,0 мм. A. Целый ЭкЗемплЯр, вид сверху и сбоку. B. Щиток IV, вид сбоку, C. Щиток IV, скульптура тегментума на боковом поле. D. Дорсальные и вентральные чеШуйки.
FIG. 14 in Indonesian chitons of the genera Belknapchiton Sirenko, Saito et Schwabe, 2022 and Leptochiton Gray, 1847 (Mollusca: Polyplacophora: Leptochitonidae)
FIG. 14. Leptochiton commandorensis, Banda Sea, Indonesia, 3200 m, BL–5.0 mm. A. Dorsal and ventral scales. B, C. Radula. D. Major lateral and uncinal teeth of radula. РИС. 14. Leptochiton commandorensis, море Банда, ИндонеЗиЯ, 3200 м, BL–5,0 мм. A. Дорсальные и вентральные чеШуйки. B, C. Радула. D. БольШой латеральный и унцинальный Зубы радулы.
FIG. 6 in Indonesian chitons of the genera Belknapchiton Sirenko, Saito et Schwabe, 2022 and Leptochiton Gray, 1847 (Mollusca: Polyplacophora: Leptochitonidae)
FIG. 6. Belknapchiton giganteus, Banda Sea, Indonesia, 3200 m, BL–10.0 mm. A. Dorsal scales in sutural part of perinotum. B, C. Radula. D. Central, first and major lateral, and uncinal teeth of radula. РИС. 6. Belknapchiton giganteus, море Банда, ИндонеЗиЯ, 3200 м, BL–10,0 мм. A. Дорсальные чеШуйки в центральной части перинотума. B, C. Радула. D. Центральные, первые и больШие латеральные и унцинальные Зубы радулы.
FIG. 12 in Indonesian chitons of the genera Belknapchiton Sirenko, Saito et Schwabe, 2022 and Leptochiton Gray, 1847 (Mollusca: Polyplacophora: Leptochitonidae)
FIG. 12. Leptochiton commandorensis, Banda Sea, Indonesia, 3200 m, BL–5.0 mm. A. Head valve, dorsal view. B. Valve II, dorsal view. C. Valve IV, dorsal view. D. Valve VIII, dorsal view. E. Valve V, ventral view. F. Valve IV, tegmentum sculpture in central area. G. Valve IV, frontal view. H. Valve VIII, lateral view. РИС. 12. Leptochiton commandorensis, море Банда, ИндонеЗиЯ, 3200 м, BL–5,0 мм. A. Головной Щиток, вид сверху. B. Щиток II, вид сверху. C. Щиток IV, вид сверху. D. Щиток VIII, вид сверху. E. Щиток V, вид сниЗу. F. Щиток IV, скульптура тегментума на центральном поле. G. Щиток IV, вид спереди. H. Щиток VIII, вид сбоку.
FIG. 6 in Chitons (Mollusca, Polyplacophora) from Rapa, the southernmost island of Polynesia
FIG. 6. — Chiton (Rhyssoplax) rapaitiensis n. sp.,holotype,Rapa Island, RAPA 2002, stn 10, radula, anterior part. Scale bar: 500 µm.
FIG. 4. — Leptochiton hiriensis n in Chitons (Mollusca, Polyplacophora) from Rapa, the southernmost island of Polynesia
FIG. 4. — Leptochiton hiriensis n. sp., Rapa Island, RAPA 2002: A, holotype, stn 9, 5.5 mm, dorsal girdle scales, next to the suture; B-F, specimen, stn 30, 1.2 mm; B, ribbed marginal scales; C, dorsal girdle needle; D, F, marginal girdle needle, among ventral girdle scales; E, ventral girdle scales. Scale bars: A, C-F, 10 µm; B, 20 µm.
FIG. 2. — Leptochiton hiriensis n in Chitons (Mollusca, Polyplacophora) from Rapa, the southernmost island of Polynesia
FIG. 2. — Leptochiton hiriensis n. sp., Rapa Island, RAPA 2002: A-C, holotype, stn 9, 5.5 mm; A, complete specimen in dorsal view, anterior region on the right side; B, detail of valve ii, left side; C, sutural region of valves vi-vii, left side; D-F, paratype, stn 16, 1.3 mm; D, head and second valve in situ, dorsal view; E, valve vii, dorsal view; F, tail valve, dorsal view. Scale bars: A, 400 µm; B, C, 10 µm; D-F, 100 µm.
FIG. 7 in Chitons (Mollusca, Polyplacophora) from Rapa, the southernmost island of Polynesia
FIG. 7. — Chiton (Rhyssoplax) rapaitiensis n. sp., paratype, Rapa Island, RAPA 2002, stn 25, 2.7 mm: A, cluster of eggs, HMDS dried, from the right mantle cavity side; B, dorsal surface of an egg (marked by an arrow in A). Scale bars: A, 100 µm; B, 10 µm.
Data from: Local adaptation in shell shape traits of a brooding chiton with strong population genomic differentiation
<p class="MsoNormal"><span>Comparing divergence in quantitative tr</span><span>aits and neutral m</span><span>olecular markers, such as <em>Q</em><sub>ST</sub><em>–F</em><sub>ST</sub> comparisons, provides a means to distinguish between natural selection and genetic drift as causes of population differentiation in complex polygenic traits. </span><em>Onithochiton neglectus</em> (Rochebrune, 1881) is a morphologically variable chiton endemic to New Zealand, with populations distributed over a broad latitudinal environmental gradient. In this species, the morphological variants cluster into two geographically separated shell shape groups, and the phenotypic variation in shell shape has been hypothesised to be adaptive. Here, we assessed this hypothesis by comparing neutral genomic differentiation between populations (<em><span>F<sub>ST</sub></span></em><span>)</span> with an index of phenotypic differentiation (<em>P<sub>ST</sub></em>). We used 7,562 putatively neutral single nucleotide polymorphisms (SNPs) across 15 populations and three clades of <em>O. neglectus</em> throughout New Zealand to infer <em><span>F<sub>ST</sub></span></em>. <em>P<sub>ST</sub></em> was calculated from 18 shell shape traits and gave highly variable estimates across populations, clades and shape groups. By systematically comparing <em>P<sub>ST</sub></em> with <em>F<sub>ST</sub></em><sub>,</sub> we identified evidence of local adaptation in a number of the <em>O. neglectus </em>shell shape traits. This <span>supports the hypothesis that shell shape could be an adaptive trait, potentially correlated with the ability to live and raft in kelp holdfasts.</span></p>
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