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963 results for “Gobies”
Fig. 3 in Mugilogobius hitam, a new species of freshwater goby (Teleostei: Gobioidei: Gobiidae) from Lake Towuti, central Sulawesi, Indonesia
Fig. 3. Cobble and gravel substrate at type locality, Lake Towuti (photograph by H.-G. Evers).
Fig. 20 in Taxonomic Composition And Systematics Of Late Cretaceous Lizard Assemblages From Ukhaa Tolgod And Adjacent Localities, Mongolian Gobi Desert
Fig. 20. Pyramicephalosaurus cherminicus: A, IGM 3/131, incomplete right maxilla with
Fig. 17 in Taxonomic Composition And Systematics Of Late Cretaceous Lizard Assemblages From Ukhaa Tolgod And Adjacent Localities, Mongolian Gobi Desert
Fig. 17. Gobinatus arenosus: A–D, IGM 3/126, incomplete skull with mandibles from Khulsan,
Fig. 9 in Taxonomic Composition And Systematics Of Late Cretaceous Lizard Assemblages From Ukhaa Tolgod And Adjacent Localities, Mongolian Gobi Desert
Fig. 9. Mimeosaurus crassus: A–C, IGM 3/
Fig. 34 in Taxonomic Composition And Systematics Of Late Cretaceous Lizard Assemblages From Ukhaa Tolgod And Adjacent Localities, Mongolian Gobi Desert
Fig. 34. Anguimorpha, Varanoidea, Aiolosaurus oriens, new genus and species: A–C, IGM 3/171,
Fig. 1 in Taxonomic Composition And Systematics Of Late Cretaceous Lizard Assemblages From Ukhaa Tolgod And Adjacent Localities, Mongolian Gobi Desert
Fig. 1. Map of Mongolian Gobi Desert showing major fossil localities.
FIG. 12 in A new specimen of the ornithischian dinosaur Haya griva, cross-Gobi geologic correlation, and the age of the Zos Canyon beds
FIG. 12. Looking south toward Red Rum (arrow) at the intermediate white beds of Zos Canyon.
FIG. 13 in A new specimen of the ornithischian dinosaur Haya griva, cross-Gobi geologic correlation, and the age of the Zos Canyon beds
FIG. 13. The Red Rum sublocality, looking west-southwest.
FIG. 14 in A new specimen of the ornithischian dinosaur Haya griva, cross-Gobi geologic correlation, and the age of the Zos Canyon beds
FIG. 14. Looking northwest from the Red Rum sublocality toward the discovery site (arrow).
FIG. 11 in A new specimen of the ornithischian dinosaur Haya griva, cross-Gobi geologic correlation, and the age of the Zos Canyon beds
FIG. 11. Looking south at the basalmost fluvial red sands at Zos Canyon.
FIG. 7 in A new specimen of the ornithischian dinosaur Haya griva, cross-Gobi geologic correlation, and the age of the Zos Canyon beds
FIG. 7. Ventral view of the preserved dorsal vertebrae of IGM 100/3181. Anterior is to the right.
FIG. 5 in A new specimen of the ornithischian dinosaur Haya griva, cross-Gobi geologic correlation, and the age of the Zos Canyon beds
FIG. 5. The radius (top) and ulna (bottom) of IGM 100/3181.
FIG. 2. IGM 100 in A new specimen of the ornithischian dinosaur Haya griva, cross-Gobi geologic correlation, and the age of the Zos Canyon beds
FIG. 2. IGM 100/3181, a partial skeleton of Haya griva.
Fig. 8. Sicyopterus laticeps. A, MNHN 918 in Review of the Malagasy Sicydiine Gobies (Teleostei: Gobiidae), with Description of a New Species and Comments on the Taxonomic Status of Gobius lagocephalus Pallas, 1770
Fig. 8. Sicyopterus laticeps. A, MNHN 918, syntype, adult male, 97.6 mm SL, Réunion. B, MNHN
Fig. 18 in A Complete Late Cretaceous Iguanian (Squamata, Reptilia) from the Gobi and Identification of a New Iguanian Clade
Fig. 18. Left knee of Saichangurvel davidsoni (IGM 3/858) in anterodorsal view.
Fig. 17 in A Complete Late Cretaceous Iguanian (Squamata, Reptilia) from the Gobi and Identification of a New Iguanian Clade
Fig. 17. Left pes of Saichangurvel davidsoni
Fig. 1 in A Complete Late Cretaceous Iguanian (Squamata, Reptilia) from the Gobi and Identification of a New Iguanian Clade
Fig. 1. Saichangurvel davidsoni (IGM 3/858) in dorsal view as preserved.
Fig. 2 in A Complete Late Cretaceous Iguanian (Squamata, Reptilia) from the Gobi and Identification of a New Iguanian Clade
Fig. 2. Map of Mongolia showing the location of Ukhaa Tolgod.
Data from: Using DNA barcoding to identify host-parasite interactions between cryptic species of goby (Coryphopterus: Gobiidae, Perciformes) and parasitic copepods (Pharodes tortugensis: Chondracanthidae, Cyclopoida)
<p>Previous work, using morphological characters, identified a generalist copepod parasite (<i>Pharodes tortugensis</i>) at high prevalence on two common gobies (C<i>oryphopterus glaucofraenum</i> and <i>C. dicrus</i>) in the British Virgin Islands (BVI). DNA barcoding subsequently revealed <i>C. glaucofraenum</i> to be three morphologically similar species (<i>C. glaucofraenum</i>, <i>C. venezuelae</i> and <i>C. tortugae</i>), casting doubt on host identities in the BVI and the classification of the parasite as a single species. Mitochondrial cytochrome c oxidase subunit I (COI) data from 67 gobies in the BVI showed that, in addition to <i>C. dicrus</i>, host gobies were a mix of <i>C. glaucofraenum</i> and <i>C. venezuelae,</i> while <i>C. tortugae</i> was unexpectedly absent from the study area. COI data (n = 70) indicated that the copepod infecting all three hosts was a single species, almost certainly <i>P. tortugensis</i>. The pharodes–coryphopterus interaction has a strong impact on host dynamics in the BVI, and a revised understanding of these dynamics must account for any differences among the three newly confirmed hosts in transmission of, and susceptibility to, the shared parasite. No other infected hosts were discovered at our sites, but <i>P. tortugensis</i> is reportedly widespread and infects 12 additional host species elsewhere. Further DNA barcoding is thus needed to test whether <i>P. tortugensis</i> is truly a widespread generalist, or instead represents a group of more specialized cryptic species.</p>
Going against the flow: barriers to gene flow impact patterns of connectivity in cryptic coral reef gobies throughout the western Atlantic
<p class="CxSpFirst"><b>Aim</b>: Complex oceanographic features have historically caused difficulty in understanding gene flow in marine taxa. Here, we evaluate the impact of potential phylogeographic barriers to gene flow and assess demography and evolutionary history of a coral reef goby species complex. Specifically, we test how the Amazon River outflow and ocean currents impact gene flow.</p> <p class="CxSpMiddle"><b>Location</b>: Western Atlantic.</p> <p class="CxSpMiddle"><b>Taxon</b>: The bridled goby (<i>Coryphopterus glaucofraenum</i>) and sand-canyon goby (<i>C. venezuelae</i>) species complex.</p> <p class="CxSpMiddle"><b>Methods</b>: We used mitochondrial DNA and 2401 genomic SNPs to investigate evolutionary history and test hypotheses of how major barriers impact species-level differentiation. We used clustering algorithms and pairwise <i>F</i><sub>ST</sub> to assess population differentiation caused by minor barriers within and among regions. Finally, we tested alternate hypotheses of demographic history via coalescent simulations to determine the most plausible spread across the Western Atlantic.</p> <p class="CxSpMiddle"><b>Results</b>: We found two unique clades of <i>C. glaucofraenum</i> along the Brazilian coast and Atol das Rocas (AR) that are more closely related to <i>C. venzuelae</i>. Further genetic structure within the Caribbean and separately along the Brazilian coast led to at least two distinct populations in each location. Coalescent simulations indicated that an ancestral population of <i>C. venezuelae</i> split from <i>C. glaucofraenum</i> in the Caribbean, dispersed to Brazil, then spread to AR.</p> <p class="CxSpMiddle"><b>Main Conclusions</b>: Species-level genetic differentiation has resulted from the Amazon River outflow and isolation of AR. Population differentiation within the Caribbean matched previous studies indicating an east-west pattern of divergence. Brazilian population differentiation was impacted by the cold-water upwelling at Cabo Frio. Overall, this research highlights how barriers to gene flow impact speciation and genetic structure within western Atlantic gobies and provides insight into the role oceanographic features have in the speciation process of fishes.</p>
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