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22 results for “Lethenteron”
Fig. 1 in Five Trophically-transmitted Parasites from Adult Arctic Lampreys Lethenteron camtschaticum (Petromyzontiformes: Petromyzontidae): Biological Indicators of the Host's Marine Life as a Predator
Fig. 1. Endoparasites from adult Arctic lampreys Lethenteron camtschaticum (Tilesius, 1811) from the Ishikari River, Hokkaido. A, Brachyphallus crenatus (Rudolphi, 1802); B, Lecithaster gibbosus (Rudolphi, 1802); C, Nybelinia surmenicola (Okada in Dollfus, 1929); D, metabasal armature of a tentacle of N. surmenicola; E, tetraphyllidean plerocercoid; F, male specimen of Bolbosoma sp.; G, female specimen of Bolbosoma sp. Scale bars: A–B, 500 µm; C, E–G, 2 mm; D, 50 µm.
Data from: Form-assortative mating behaviors of individuals from parasitic and non-parasitic populations of Arctic lamprey (Lethenteron camtschaticum)
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Chromosome‐level genome assembly of Lethenteron reissneri provides insights into lamprey evolution
<p>The reissner lamprey<i> Lethenteron reissneri</i> belonging to Cyclostomata, serves as a bridge between invertebrates and jawed vertebrates, and is considered the most direct ancestor of vertebrates. However, the genetic mechanisms underlying the adaptive evolution of lampreys remain unclear. Here, we supplied the genome data and annotation data of <em>Lethenteron reissneri</em>. Total 5 files were uploaded, including the assembled genome of <i>Lethenteron reissneri</i>, the gene annotation file in gff format, the gene function annotation file, the LIP gene sequences of 50 species used in the article, and the readme file. This study not only provides the first chromosome-level reference genome in Cyclostomata, but also indicates the unique biology and adaptive evolution of lampreys.</p>
FIGURE 7 in Lethenteron ninae, a new nonparasitic lamprey species from the north-eastern Black Sea basin (Petromyzontiformes: Petromyzontidae)
FIGURE 7. Tongue precursor in ammocoete. a, Lethenteron ninae (paratype); b, Eudontomyzon mariae (ZISP 29159). 1, bulb; 2, cirri.
FIGURE 6 in Lethenteron ninae, a new nonparasitic lamprey species from the north-eastern Black Sea basin (Petromyzontiformes: Petromyzontidae)
FIGURE 6. Lethenteron ninae, holotype (photo made from live specimen, ZISP 54431, TL (measured after preservation) 163.8 mm, Shakhe River).
FIGURE 3. Oral disc. a in Lethenteron ninae, a new nonparasitic lamprey species from the north-eastern Black Sea basin (Petromyzontiformes: Petromyzontidae)
FIGURE 3. Oral disc. a, Lethenteron ninae, holotype (photo made from live specimen, ZISP 54431, TL (after preservation) 163.8 mm, Shakhe River); b, Eudontomyzon mariae (from Berg 1931: Pl. 4, FIGURE 2, syntype, TL 192 mm). 1, supraoral lamina; 2, infraoral lamina; 3, posterial teeth (one incomplete row in L. ninae and three rows in E. mariae); 4, anterior endolateral bicuspid tooth; 5, row of marginal teeth; 6, fimbriae; 7, ventral pigmented neuromast; 8, exolateral teeth; 9, transverse lingual lamina.
FIGURE 4. Transverse lingual lamina. a in Lethenteron ninae, a new nonparasitic lamprey species from the north-eastern Black Sea basin (Petromyzontiformes: Petromyzontidae)
FIGURE 4. Transverse lingual lamina. a, Lethenteron ninae, paratype (formula 6u-I-5u); b, Eudontomyzon mariae, syntype (formula 1u-I-2u). Scale bar: 1 mm. Arrows show the differences.
Chromosome‐level genome assembly of Lethenteron reissneri provides insights into lamprey evolution
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Figure 6 from: Naseka AM, Renaud CB (2020) Morphology-based taxonomic re-assessment of the Arctic lamprey, Lethenteron camtschaticum (Tilesius, 1811) and taxonomic position of other members of the genus. ZooKeys 991: 1-67. https://doi.org/10.3897/zookeys.991.54938
Figure 6 Oral disc of syntype of Lampetra morii, CMNFI 1986–757 (formerly part of ZIN 23145), 171 mm TL. Photograph by George Ben-Tchavtchavadze, University of Ottawa, pre–1982.
Figure 5 from: Naseka AM, Renaud CB (2020) Morphology-based taxonomic re-assessment of the Arctic lamprey, Lethenteron camtschaticum (Tilesius, 1811) and taxonomic position of other members of the genus. ZooKeys 991: 1-67. https://doi.org/10.3897/zookeys.991.54938
Figure 5 Oral disc of Lethenteron reissneri, ZIN 25204, 146 mm TL with two rows of posterials from Tym' River, Sakhalin Island, Russia.
Figure 1 from: Naseka AM, Renaud CB (2020) Morphology-based taxonomic re-assessment of the Arctic lamprey, Lethenteron camtschaticum (Tilesius, 1811) and taxonomic position of other members of the genus. ZooKeys 991: 1-67. https://doi.org/10.3897/zookeys.991.54938
Figure 1 Geographic distribution of the lamprey genus Lethenteron in Eurasia based strictly on the examination of type material of Petromyzon marinus camtschaticus (●), Petromyzon kessleri (■), Lampetra japonica septentrionalis (▲) and ZIN material identified by Berg (1931) as Lampetra japonica japonica (○), La. j. kessleri (□), and La. j. septentrionalis (∆). Note that the easternmost record of La. j. kessleri from the Anadyr Estuary has been re-identified as Le. camtschaticum.
Figure 2 from: Naseka AM, Renaud CB (2020) Morphology-based taxonomic re-assessment of the Arctic lamprey, Lethenteron camtschaticum (Tilesius, 1811) and taxonomic position of other members of the genus. ZooKeys 991: 1-67. https://doi.org/10.3897/zookeys.991.54938
Figure 2 Oral disc of neotype of Petromyzon marinus camtschaticus and lectotype of P. japonicus, ZMB 6475, 418.3 mm TL.
FIGURE 5 in Lethenteron ninae, a new nonparasitic lamprey species from the north-eastern Black Sea basin (Petromyzontiformes: Petromyzontidae)
FIGURE 5. Lethenteron ninae, paratype (ZISP 54435, TL 162.5 mm, Mokva River).
FIGURE 1 a-c in Lethenteron ninae, a new nonparasitic lamprey species from the north-eastern Black Sea basin (Petromyzontiformes: Petromyzontidae)
FIGURE 1 a-c. Measurement landmarks of a lamprey adult. For explanations see Table 1.
FIGURE 2 in Lethenteron ninae, a new nonparasitic lamprey species from the north-eastern Black Sea basin (Petromyzontiformes: Petromyzontidae)
FIGURE 2. Ammocoete of Lethenteron ninae, paratype (ZISP 54436, TL 126.9 mm, Mzymta River).
FIGURE 10 in Lethenteron ninae, a new nonparasitic lamprey species from the north-eastern Black Sea basin (Petromyzontiformes: Petromyzontidae)
FIGURE 10. Mzymta River (in the late autumn), a typical habitat of Lethenteron ninae.
Figure 4 from: Renaud CB, Naseka AM (2015) Redescription of the Far Eastern brook lamprey Lethenteron reissneri (Dybowski, 1869) (Petromyzontidae). ZooKeys 506: 75-93. https://doi.org/10.3897/zookeys.506.9817
Figure 4 - Oral disc of lampreys identified by Berg (1931) as Lethenteron reissneri without row of posterials. A ZIN 14457, Shangshi River, Songhua (Sungari) River system, People's Republic of China, 146 mm TL with complete posterial row comprising 24 unicuspid teeth (Pr1; only few of these teeth visible in photo). Note second row of posterials (Pr2). Two exolateral teeth additionally present on left side, one between first and second (E1) and other between second and third endolaterals (E2) B ZIN 15078 (re-identified as Lethenteron camtschaticum), Samarga River, near Sufren Cape, Russia, 178.0+ mm TL with complete posterial row comprising 18 unicuspid, 3 bicuspid, 1 unicuspid teeth (only few of these teeth visible in photo). Exolateral tooth present on right side between first and second endolaterals not visible because oral disc not fully open.
Figure 3 from: Renaud CB, Naseka AM (2015) Redescription of the Far Eastern brook lamprey Lethenteron reissneri (Dybowski, 1869) (Petromyzontidae). ZooKeys 506: 75-93. https://doi.org/10.3897/zookeys.506.9817
Figure 3 - Syntypes (ammocoetes) of Petromyzon reissneri Dybowski, NMW 78112, 106.5 mm (below); 122.2 mm TL (above). Arrows point to dark midline streak on tail.
Figure 1 from: Renaud CB, Naseka AM (2015) Redescription of the Far Eastern brook lamprey Lethenteron reissneri (Dybowski, 1869) (Petromyzontidae). ZooKeys 506: 75-93. https://doi.org/10.3897/zookeys.506.9817
Figure 1 - Geographic distribution of Lethenteron reissneri and material identified by Berg (1931) as Lethenteron reissneri without posterials. Approximate location of the type locality of Lethenteron reissneri, Amur River basin, Russia (solid star), topotypic localities in Russia and Mongolia (solid diamonds) and localities of material identified by Berg (1931) as Lethenteron reissneri: Shangshi River, Amur River basin, People's Republic of China (solid diamond), Sedanka River, Sea of Japan basin, Russia (solid square), and Samarga River, Sea of Japan basin, Russia (solid square). The Sedanka and Samarga River specimens were re-identified as Lethenteron camtschaticum.
Figure 2 from: Renaud CB, Naseka AM (2015) Redescription of the Far Eastern brook lamprey Lethenteron reissneri (Dybowski, 1869) (Petromyzontidae). ZooKeys 506: 75-93. https://doi.org/10.3897/zookeys.506.9817
Figure 2 - Syntype (adult) of Petromyzon reissneri Dybowski, 1869, ZMB 7118, 117.1 mm TL, Onon River.
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