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65 results for “Guitarfish”
GUITARFISH FOSSIL 95 Million years old Lebanon
Source: Objaverse 1.0 / Sketchfab
FIGURE 9 in Description of a new species of giant guitarfish, Glaucostegus younholeei sp nov. (Rhinopristiformes: Glaucostegidae) from the northern Bay of Bengal Bangladesh
FIGURE 9. Maximum-likelihood tree constructed for COI gene sequences of Glaucostegus younholeei sp. nov. and its genetically closely related congeneric species retrieved from GenBank. Values of bootstrap support of>80% are shown above branches. Scale bar indicates number of nucleotide substitutions per site.
FIGURE 8. A, B & C in Description of a new species of giant guitarfish, Glaucostegus younholeei sp nov. (Rhinopristiformes: Glaucostegidae) from the northern Bay of Bengal Bangladesh
FIGURE 8. A, B & C showing the thorns position of adult male holotype of preserved Glaucostegus younholeei sp. nov. (R1911CB-04).
FIGURE 6 in Description of a new species of giant guitarfish, Glaucostegus younholeei sp nov. (Rhinopristiformes: Glaucostegidae) from the northern Bay of Bengal Bangladesh
FIGURE 6. Lateral views of the unpaired fins of preserved Glaucostegus younholeei sp. nov., adult male holotype (R1911CB- 04): A. Tail folds, B. First dorsal fin, C. Second dorsal fin, D. caudal fin.
FIGURE 4 in Description of a new species of giant guitarfish, Glaucostegus younholeei sp nov. (Rhinopristiformes: Glaucostegidae) from the northern Bay of Bengal Bangladesh
FIGURE 4. Preserved holotypes of adult male Glaucostegus younholeei sp. nov. (R1911CB-04, 933 mm TL): A. Mouth showing the teeth; B. Dorsal view of head, snout, and nostril, C. Ventral view of head, snout, and nostril.
FIGURE 3 in Description of a new species of giant guitarfish, Glaucostegus younholeei sp nov. (Rhinopristiformes: Glaucostegidae) from the northern Bay of Bengal Bangladesh
FIGURE 3. Preserved specimen of Glaucostegus younholeei sp. nov.: A. Dorsal view of adult male holotype, 933 mm TL (R1911CB-04); B. Ventral view of adult male holotype, 933 mm TL (R1911CB-04); C. Dorsal view of female paratype, 828 TL (R2001CB-03), D. Ventral view of female paratype, 828 mm TL (R2001CB-03).
FIGURE 2 in Description of a new species of giant guitarfish, Glaucostegus younholeei sp nov. (Rhinopristiformes: Glaucostegidae) from the northern Bay of Bengal Bangladesh
FIGURE 2. Fresh specimen of Glaucostegus younholeei sp. nov.: A. Dorsal view of adult male holotype, 933 mm TL (R1911CB-04); B. Ventral view of adult male holotype, 933 mm TL (R1911CB-04); C. Dorsal view of female paratype, 853 mm TL (R2001CB-01); D. Ventral view of female paratype, 853 mm TL (R2001CB-01).
FIGURE 1 in Description of a new species of giant guitarfish, Glaucostegus younholeei sp nov. (Rhinopristiformes: Glaucostegidae) from the northern Bay of Bengal Bangladesh
FIGURE 1. Map showing the collection site (▼) of BFDC fish landing center, Cox's Bazar, Bangladesh and the Bay of Bengal.
FIGURE 5 in Description of a new species of giant guitarfish, Glaucostegus younholeei sp nov. (Rhinopristiformes: Glaucostegidae) from the northern Bay of Bengal Bangladesh
FIGURE 5. Preserved holotypes of adult male Glaucostegus younholeei sp. nov. (R1911CB-04, 933 mm TL): A. Views of oronasal region, B. Views of orbit and spiracle.
Figure 9 in Taxonomic assessment of sharks, rays and guitarfishes (Chondrichthyes: Elasmobranchii) from south-eastern Arabia, using the NADH dehydrogenase subunit 2 (NADH2) gene
Figure 9. Neighbour-joining tree for an 829-bp fragment of the NADH2 gene for rhinobatid elasmobranchs from southeastern Arabia together with related taxa from Naylor et al. (2012). Bootstrap values are based on 1000 replications and only values ≥ 95 % are shown.
Figure 5 in Taxonomic assessment of sharks, rays and guitarfishes (Chondrichthyes: Elasmobranchii) from south-eastern Arabia, using the NADH dehydrogenase subunit 2 (NADH2) gene
Figure 5. Himantura sp. from Fujairah in the United Arab Emirates. This species clusters separately from all other ray species from the region.
Figure 4 in Taxonomic assessment of sharks, rays and guitarfishes (Chondrichthyes: Elasmobranchii) from south-eastern Arabia, using the NADH dehydrogenase subunit 2 (NADH2) gene
Figure 4. Neighbour-joining tree for an 829-bp fragment of the NADH2 gene for dasyatid rays from southeastern Arabia together with related taxa from Naylor et al. (2012). Bootstrap values are based on 1000 replications and only values ≥ 95 % are shown.
Figure 3 in Taxonomic assessment of sharks, rays and guitarfishes (Chondrichthyes: Elasmobranchii) from south-eastern Arabia, using the NADH dehydrogenase subunit 2 (NADH2) gene
Figure 3. Specimens of Carcharhinus plumbeus (top) and Carcharhinus altimus (bottom) from south-eastern Arabia. Despite the fact that these species display a high level of genetic similarity, they are morphologically distinguishable from each other.
Figure 2 in Taxonomic assessment of sharks, rays and guitarfishes (Chondrichthyes: Elasmobranchii) from south-eastern Arabia, using the NADH dehydrogenase subunit 2 (NADH2) gene
Figure 2. Neighbour-joining tree for an 829-bp fragment of the NADH2 gene from 1487 elasmobranch specimens from south-eastern Arabia. Values in parentheses indicate sample size (n) and within-group mean genetic distance (D). Bootstrap values are based on 1000 replications and only values ≥ 95% are shown.
Figure 7 in Taxonomic assessment of sharks, rays and guitarfishes (Chondrichthyes: Elasmobranchii) from south-eastern Arabia, using the NADH dehydrogenase subunit 2 (NADH2) gene
Figure 7. Specimens of Mobula eregoodootenkee (top) and Mobula kuhlii (bottom) from Oman. Despite their genetic similarity, these species are morphologically distinguishable.
Figure 8 in Taxonomic assessment of sharks, rays and guitarfishes (Chondrichthyes: Elasmobranchii) from south-eastern Arabia, using the NADH dehydrogenase subunit 2 (NADH2) gene
Figure 8. Rhinobatos sp. (top) is morphologically and genetically distinct from Rhinobatos punctifer (middle). The bottom image shows Acroteriobatus sp.
Figure 11 in Taxonomic assessment of sharks, rays and guitarfishes (Chondrichthyes: Elasmobranchii) from south-eastern Arabia, using the NADH dehydrogenase subunit 2 (NADH2) gene
Figure 11. Species commonly identified as Rhynchobatus djiddensis from south-eastern Arabia display morphological and colour variations. The specimen in the top image possesses an obviously narrower and longer rostrum. The results of the present study suggest there are at least two local lineages within this genus.
Figure 10 in Taxonomic assessment of sharks, rays and guitarfishes (Chondrichthyes: Elasmobranchii) from south-eastern Arabia, using the NADH dehydrogenase subunit 2 (NADH2) gene
Figure 10. Neighbour-joining tree for an 829-bp fragment of the NADH2 gene for Rhynchobatus spp. from southeastern Arabia and from Naylor et al. (2012). Bootstrap values are based on 1000 replications and only values ≥ 95% are shown.
Figure 6 in Taxonomic assessment of sharks, rays and guitarfishes (Chondrichthyes: Elasmobranchii) from south-eastern Arabia, using the NADH dehydrogenase subunit 2 (NADH2) gene
Figure 6. Neighbour-joining tree for an 829-bp fragment of the NADH2 gene for Echinorhinus sp. from the present study together with Echinorhinus brucus and Echinorhinus cookei (Naylor et al., 2012). Bootstrap values are based on 1000 replications and only values ≥ 95% are shown.
Data from: Strong population structure and shallow mitochondrial phylogeny in the banded guitarfish, Zapteryx exasperata (Jordan y Gilbert, 1880) from the northern Mexican Pacific
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