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354 results for “elasmobranch”
FIGURE 15 in An Early Neogene Elasmobranch fauna from the southern Caribbean (Western Venezuela)
FIGURE 15. Early Neogene chondrichthyan diversity in the Americas. Tropical America: Barbados (Ba), Brazil (Br), Colombia (Co), Costa Rica (Cs), Cuba (Cu), The Grenadines (Gr), Panamá (Pa), Perú (Pu), Trinidad (Tr) and Venezuela (Ve). North America: United States of America (US). Southern South America: Argentina (Ar) and Chile (Ch). Aquitanian (Anq), Burdigalian (Brd), Langhian (Lngh); early Miocene without differentiation (EM), early-Middle Miocene (E- MM). Formation(Fm.), early (E). Note: to references see "Paleodiversity significance" (see Discusion).
FIGURE 12 in An Early Neogene Elasmobranch fauna from the southern Caribbean (Western Venezuela)
FIGURE 12. Myliobatiformes and other chondrichthyans of the Cantaure Formation. 1-6. Myliobatiformes indet. (AMU-CURS-507). 7-8. vertebra of chondrichthyan Indet. (AMU-CURS-928). 9-10. tooth of †Galeocerdo aduncus in association with barnacles of the family Balanidae (AMU-CURS-720). Jaw position: indet. (9). View: lingual (9), dorsal (1, 4, 5-6), ventral (2-3) and indet. (7-8).
FIGURE 11 in An Early Neogene Elasmobranch fauna from the southern Caribbean (Western Venezuela)
FIGURE 11. Mobulids of the Cantaure Formation. 1-11. †Mobula fragilis (1-3, 10-11: AMU-CURS-947; 4-6: AMU- CURS-948 and 7-9: AMU-CURS-949). 12-18. Mobula cf. †M. loupianensis (AMU-CURS-946). 19-23. Mobula sp. (AMU-CURS-927). 24-27. †Plinthicus stenodon (AMU-CURS-715). Jaw position: indet. (1-27). View: labial (1, 4, 7, 10, 14-15, 17, 22, 24), lingual (3, 6, 20, 26), occlusal (2, 5, 8, 16, 19, 25), profile (11-12, 18, 23, 27) and basal (9, 13, 21).
FIGURE 16 in An Early Neogene Elasmobranch fauna from the southern Caribbean (Western Venezuela)
FIGURE 16. Paleobathymetric interpretation of the Cantaure Formation using several proxies. A, Foraminifera (Díaz de Gamero, 1974), B, corals (Griffiths et al., 2013), C, mollusks (Jung, 1965; Landau et al., in press), D, crustaceans (Aguilera et al., 2010), E, sharks (this study), F, teleosteans (Nolf and Aguilera, 1998, Aguilera and Rodrigues de Aguilera, 2001).
FIGURE 10 in An Early Neogene Elasmobranch fauna from the southern Caribbean (Western Venezuela)
FIGURE 10. Myliobatiformes of the Cantaure Formation. 1-3. Aetobatus sp. (1-3: AMU-CURS-716). 4-14. Aetomylaeus sp. (AMU-CURS-750). 15-29. Rhinoptera sp. (15-18: AMU-CURS-979; 19-21, 22-23, 24-25, 28-29: AMU-CURS- 977 and 26-27: AMU-CURS-981). Jaw position: indet. (1-29). View: labial (11, 18), lingual (5, 12, 17, 21-22, 24, 28), occlusal (1, 4, 8, 10, 15, 19, 23, 26), profile (3, 13-14) and basal (2, 6, 7, 9, 16, 20, 25, 27, 29).
FIGURE 9 in An Early Neogene Elasmobranch fauna from the southern Caribbean (Western Venezuela)
FIGURE 9. Myliobatiformes of the Cantaure Formation. 1-10. Dasyatis sp. (1-2, 7-8: AMU-CURS-930; 3-4: AMU- CURS-932; 5-6: AMU-CURS-933 and 9-10: AMU-CURS-931). 11-17. cf. Pteroplatytrygon sp. (AMU-CURS-926). 18- 21. cf. Taeniurops sp. (AMU-CURS-925). 22-27. Dasyatidae indet. (22-24: AMU-CURS-936 and 25-27: AMU-CURS- 937). Jaw position: indet. (1-27). View: labial (4, 9, 11, 15, 21), lingual (2, 16), occlusal (1, 5, 13, 18, 22, 25), profile (3, 6-7, 10, 12, 17, 19, 24, 27) and basal (8, 14, 20, 23, 26).
FIGURE 7 in An Early Neogene Elasmobranch fauna from the southern Caribbean (Western Venezuela)
FIGURE 7. Carcharhiniformes of the Cantaure Formation. 1-5. †Isogomphodon acuarius (1-2: AMU-CURS-950 and 3- 5: AMU-CURS-951). 6-10. †Negaprion eurybathrodon (6-9: AMU-CURS-989 and 10: AMU-CURS-987). 11-15. †Physogaleus contortus (11-12: AMU-CURS-719 and 13-15: AMU-CURS-648). 16-20. Carcharhinidae indet. (AMU- CURS-939). 21-25. †Sphyrna arambourgi (21-24: AMU-CURS-961 and 25: AMU-CURS-962). Jaw position: upper (1- 3, 6-9, 16-19? 21-22, 25), lower (4-5, 10, 20? 23-24) and indet. (11-15). View: labial (2, 6, 9, 11, 13, 17-18, 22, 24-25) and lingual (1, 3-5, 7-8, 10, 12, 14-16, 19-21, 23).
FIGURE 8 in An Early Neogene Elasmobranch fauna from the southern Caribbean (Western Venezuela)
FIGURE 8. Carcharhiniformes and Rajiformes of the Cantaure Formation. 1-5. Sphyrna cf. †S. laevissima (1-3, 5: AMU-CURS-964 and 4: AMU-CURS-963). 6-11. Rhynchobatus sp. (6, 9: AMU-CURS-968; 7-8, 10: AMU-CURS-969 and 11: AMU-CURS-970). 12-20. Pristis sp. (rostral denticle 12-14: AMU-CURS-242; buccal teeth 15-20: AMU- CURS-967). Jaw position: upper (1-2) and indet. (3-11, 15-20). View: labial (1, 3), lingual (2, 4-5, 11), occlusal (6-8, 15, 17, 19), profile (18, 20), basal (9-10, 16), posterior (12) and dorsal (13-14).
FIGURE 5 in An Early Neogene Elasmobranch fauna from the southern Caribbean (Western Venezuela)
FIGURE 5. Carcharhiniformes of the Cantaure Formation. 1-5. Rhizoprionodon sp. (1-3, 5: AMU-CURS-975 and 4: AMU-CURS-960). 6-10. †Carcharhinus ackermannii (6-7: AMU-CURS-713 and 8-10: AMU-CURS-714). 11-15. Carcharhinus brachyurus (AMU-CURS-990). 16-20. Carcharhinus falciformis (AMU-CURS-991). 21-25. Carcharhinus cf. C. galapagensis (AMU-CURS-973). Jaw position: upper (2, 4-14, 16-25) and lower (1, 3. 15). View: labial (6, 9, 12- 13, 17-18, 20-21, 24) and lingual (1-5, 7-8, 10-11, 14-16, 19, 22-23, 25).
FIGURE 4 in An Early Neogene Elasmobranch fauna from the southern Caribbean (Western Venezuela)
FIGURE 4. Carcharhiniformes of the Cantaure Formation. 1-2. Galeorhinus cf. G. galeus (AMU-CURS-974). 3-7. Mustelus sp. (AMU-CURS-975). 8-13. †Hemipristis serra (8: AMU-CURS-731 and 9-13: AMU-CURS-644). 14-18. †Galeocerdo aduncus (14-15: AMU-CURS-730 and 16-18: AMU-CURS-647). 19-23. †Galeocerdo mayumbensis (19-20: AMU-CURS-995 and 21-23: AMU-CURS-646). Jaw position: upper (9-12), lower (8? 13) and indet. (1-7, 14- 23). View: labial (1, 6, 7, 10, 15, 19, 21-22), lingual (2, 4, 8-9, 11-14, 16-18, 20, 23) and occlusal-lingual (3, 5).
FIGURE 1 in An Early Neogene Elasmobranch fauna from the southern Caribbean (Western Venezuela)
FIGURE 1. Location and stratigraphy of the Cantaure Formation. 1. Fossiliferous localities. 2. Stratigraphic section of locality 1 (artesian well) and locality 2 (outcrop). Stratigraphic column modified after Aguilera (2010) and Aguilera et al. (2013).
FIGURE 6 in An Early Neogene Elasmobranch fauna from the southern Caribbean (Western Venezuela)
FIGURE 6. Carcharhiniformes of the Cantaure Formation. 1-4. †Carcharhinus gibbesii (AMU-CURS-958). 5-8. Carcharhinus cf. C. limbatus (AMU-CURS-944). 9-12. Carcharhinus cf. C. macloti (AMU-CURS-957). 13-17. Carcharhinus perezi (AMU-CURS-956). 18-22. Carcharhinus sp.1 (AMU-CURS-943). 23-24. Carcharhinus spp. (23: AMU- CURS-941 and 24: AMU-CURS-940). Jaw position: upper (1-24). View: labial (1, 4, 6-7, 10, 12, 14, 17-18, 20, 22-24) and lingual (2-3, 5, 8-9, 11, 13, 15-16, 19, 21).
FIGURE 2 in An Early Neogene Elasmobranch fauna from the southern Caribbean (Western Venezuela)
FIGURE 2. Elasmobranch paleodiversity of the Cantaure Formation. 1. Orders and 2. Families and genera.
FIGURE 3 in An Early Neogene Elasmobranch fauna from the southern Caribbean (Western Venezuela)
FIGURE 3. Orectolobiformes and Lamniformes of the Cantaure Formation. 1-9. Nebrius sp. (AMU-CURS-986); 10-11. †Paratodus benedenii (AMU-CURS-645). 12-21. †Carcharocles megalodon (12: AMU-CURS-997; 13: AMU-CURS- 512; 14: UNEFM-PF-349; 15: AMU-CURS-996; 16: AMU-CURS-518; 17-18: UNEFM-PF-s/n; 19: AMU-CURS-512 and 20-21: AMU-CURS-515). 22-26. Alopias cf. A. vulpinus (22-23: AMU-CURS-985; 24-25: AMU-CURS-983 and 26: AMU-CURS-984). Jaw position: upper (10-11? 12, 14? 17, 22-25), lower (13, 15, 18) and indet. (1-9, 16, 19-21, 26). View: labial (1, 6, 10, 13, 20-21, 23, 24), lingual (2, 7, 11-12, 14-19, 22, 25-26), profile (3, 8), occlusal (4) and basal (5, 9).
FIGURE 4 in Methods for isolation and quantification of microfossil fish teeth and elasmobranch dermal denticles (ichthyoliths) from marine sediments
FIGURE 4. Examples of select taxonomically identifiable fossil ichthyoliths and modern counterparts. All modern ichthyoliths were isolated from specimens in the Scripps Marine Vertebrate Collection. The fossil Myctophidae and Triakidae specimens are from ODP Site 1262, and are 62 million years old. The Scaridae modern teeth are from Smithsonian National Museum of Natural History's Fish Collection and subfossil teeth are from coral reef sediment cores taken off of the coast of Bocas del Toro, Panama, and are approximately 1200 years old.
FIGURE 3. Paleocene-aged ichthyoliths from ODP Site 1262, stained with Alizarin Red S in Methods for isolation and quantification of microfossil fish teeth and elasmobranch dermal denticles (ichthyoliths) from marine sediments
FIGURE 3. Paleocene-aged ichthyoliths from ODP Site 1262, stained with Alizarin Red S. The scale bar is 500 μm, with teeth>106 μm in the upper row and teeth <106 μm in the lower. Note that in the coloring effect is present in all teeth, however, the degree of staining varies.
FIGURE 2. A flowchart showing the steps for sediment processing for efficient and effective ichthyolith isolation from a in Methods for isolation and quantification of microfossil fish teeth and elasmobranch dermal denticles (ichthyoliths) from marine sediments
FIGURE 2. A flowchart showing the steps for sediment processing for efficient and effective ichthyolith isolation from a variety of sediment types. Sediment types are in boxes, while processing steps are shown in ovals.
FIGURE 1 in Methods for isolation and quantification of microfossil fish teeth and elasmobranch dermal denticles (ichthyoliths) from marine sediments
FIGURE 1. An assortment of large (>106 μm fraction) denticles (elasmobranch scales; left) and fish teeth (right) from DSDP Site 596, a red clay core in the South Pacific. These ichthyoliths are approximately 52 million years old. Image was taken on the Hull Lab Imaging System, Yale University. Scale bar is 500 μm.
Figure 5 in Late Eocene (Priabonian) elasmobranchs from the Dry Branch Formation (Barnwell Group) of Aiken County, South Carolina, USA
Figure 5. Scyliorhinid shark teeth from the Dry Branch Formation (Priabonian) of Aiken County, South Carolina. A–G. Foumtizia sp. Anterior tooth in labial (A), lingual (B) and profile (C) views, SC2013.38. 27. Anterior tooth in labial (D) view, SC96.97.5. Anterior tooth in labial (E) view, SC96.97.6. Anterior tooth in labial view (F), SC96.97.7. Anterior tooth in labial view (G), SC 96.97.8. H–N. Premontreia (Oxyscyllium) sp. cf. Pr. (O.) gilberti. Anterior tooth in labial (H) and distal (I) views, SC2013.38.29. Labial at left in I. Anterior? tooth in labial (J), lingual (K) and basal (L) views, SC2013.38.30. Lateral tooth in labial (M) and lingual (N) views, SC2013.38.31. O–CC. Scyliorhinus sp. Lateral tooth in labial (O), lingual (P), occlusal (Q), and basal (R) views, SC2013.38.36. Anterolateral tooth in basal (S) view, SC2013.38.35. Lateral tooth in labial (T), lingual (U), and occlusal (V) views, SC2013.38.39. Lateral tooth in labial (W), lingual (X), and occlusal (Y) views, SC2013.38.37. Lateral tooth in labial (Z), lingual (AA), and occlusal (BB) views, SC2013.38.38. Anterior? tooth in occlusal (CC) view, SC2013.38.40. Labial at top in L, R, S; at bottom in Q, V, Y, BB, CC. Scale bars=1mm.
Figure 1. A in Late Eocene (Priabonian) elasmobranchs from the Dry Branch Formation (Barnwell Group) of Aiken County, South Carolina, USA
Figure 1. A. Outline map of southeastern US coastal states showing South Carolina, Aiken County (shaded region), and the city of Aiken. B. Generalized stratigraphic section of Barnwell Group strata in the Aiken, South Carolina area. The fossiliferous horizon at the South Aiken Site occurs approximately 2 m below the base of the Tobacco Road Formation. A and B modified from Cicimurri and Ebersole (2015). Abbreviations: NP=calcareous nannoplankton zone, O'burg=Orangeburg.
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