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354 results for “Elasmobranchs”
FIGURE 3. A-N in Diversity and renewal of tropical elasmobranchs around the Middle Eocene Climatic Optimum (MECO) in North Africa: New data from the lagoonal deposits of Djebel el Kébar, Central Tunisia
FIGURE 3. A-N: Carcharhinus kasserinensis nov. sp. A. Parasymphyseal upper tooth KEB 1-086, A1. labial view, A2. Lingual view; B. HOLOTYPE Anterior upper tooth KEB 1-087, B1. Labial view, B2. Lingual view, B3. Magnificence of mesial cutting edge; C. Antero-lateral upper tooth KEB 1-088, C1. Labial view, C2. Lingual view; D. Antero-lateral upper tooth KEB 1-089, D1. Labial view, D2. Lingual view; E. Antero-lateral upper tooth KEB 1-226, E1 Lingual view, E2. Labial view; F. Antero-lateral upper tooth KEB 1-227; G. Antero-lateral upper tooth KEB 1-090, G1. Labial view, G2. Lingual view; H. Lateral upper tooth KEB 1-091, labial view; I Posterior upper tooth KEB 1-092, lingual view; J. Symphyseal abnormal lower tooth KEB 1-093, J1. Labial view, J2. Lingual view; K. Anterior lower tooth KEB 1-094, labial view; L. Anterior lower tooth KEB 1-095, L1. Labial view, L2. Lingual view; M. Antero-lateral lower tooth KEB 1- 096, M1. Labial view, M2. Lingual view; N. Antero-lateral lower tooth KEB 1-097, N1. Lingual view, N2. Labial view, N3. Profile.
FIGURE 2 in Diversity and renewal of tropical elasmobranchs around the Middle Eocene Climatic Optimum (MECO) in North Africa: New data from the lagoonal deposits of Djebel el Kébar, Central Tunisia
FIGURE 2. Locality of KEB-1, Djebel el Kébar, Kasserine region, Tunisia. A, Simplified topographic map of Tunisia locating the Djebel el Kébar in central Tunisia; B, simplified stratigraphical position of fossiliferous level having yielded the fossil-bearing KEB-1 locality; C, photograph showing the typical badlands of variegated clays from the early Tertiary sequence of Djebel el Kébar. See Merzeraud et al. (2016) for precise details about geological settings.
FIGURE 8. A-C in Diversity and renewal of tropical elasmobranchs around the Middle Eocene Climatic Optimum (MECO) in North Africa: New data from the lagoonal deposits of Djebel el Kébar, Central Tunisia
FIGURE 8. A-C: Nebrius sp. A. Anterior tooth KEB 1-144, A1. Labial view, A2. Lingual view, A3. profile; B. Antero-lateral tooth KEB 1-145, B1. Labial view, B2. Basal view; C. Lateral tooth KEB 1-146, C1. Labial view, C2. Lingual view; D-G: Stegostoma tethysiensis nov. sp. D. (HOLOTYPE) Anterior tooth KEB 1-147, D1. Labial view, D2. Lingual view, D3. Basal view; E. Antero-lateral tooth KEB 1-148, E1. Labial view, E2. Occlusal viex, E3. profile; F. Lateral tooth KEB 1-149, labial view; G. Posterior tooth KEB 1-150, labial view; H: Hemiscyllium sp. 8. Antero-lateral tooth KEB 1-151, labial view; I-N: Odontorythys pappenheimi I.?Anterior tooth KEB 1-152, I1. Profile, I2. Labial view; J.?Latero-posterior tooth KEB 1-153, lingual view; K.?Latero-posterior tooth KEB 1-154, profile; L.?Latero-posterior tooth KEB 1-155, profile; M.?Latero-posterior tooth KEB 1-156, profile; N.? lateral or posterior tooth KEB 1-157, N1. Profile, N2. Labial view, N3. Lingual view.
FIGURE 13. A-E in Diversity and renewal of tropical elasmobranchs around the Middle Eocene Climatic Optimum (MECO) in North Africa: New data from the lagoonal deposits of Djebel el Kébar, Central Tunisia
FIGURE 13. A-E. Coupatezia cristata nov. sp. A. antero-lateral tooth KEB 1-205, HOLOTYPE, A1.occlusal view, A2. Profile, A3. Labial view; B. Anterior tooth KEB 1-206, B1. Lingual view, B2. Basal view, C. lateral tooth KEB 1-207, C1. Occlusal view, C2. Magnificence of C1, C3. Lingual view; D. lateral tooth KEB 1-208, D1. Occlusal view, D2. Magnificence of D1, D3. Lingual view; E. lateral tooth KEB 1-209, E1. Occlusal view, E2., lingual view, E3. Basal view. F-G. Rhinoptera sp. F. medium tooth KEB 1-210, lingual view, G. medium tooth KEB 1-211, labial view; H-J. Myliobatis sp., H. lateral tooth KEB 1-212, lingual view, I. medio-lateral tooth KEB 1-213, lingual view, J lateral tooth KEB 1-214, lingual view; K. Aetobatus sp. KEB 1-215, ligual view, L-M. Garabatis sp., L. KEB 1-216, occlusal view, M. KEB 1-217, L1. occlusal view, L2. Magnificence of central part, L3. Magnificence of marginal part of crown.
FIGURE 6. A-C in Diversity and renewal of tropical elasmobranchs around the Middle Eocene Climatic Optimum (MECO) in North Africa: New data from the lagoonal deposits of Djebel el Kébar, Central Tunisia
FIGURE 6. A-C: Sphyrna guinoti nov. sp. A. Anterior upper tooth of Young specimen KEB 1-120, A1. Lingual view, A2. Labial view; B. Lateral lower tooth of Young specimen KEB 1-121, B1. Labial view, B2. Lingual view; C. Lateral upper tooth KEB 1-122, C1. Labial view, C2. Lingual view; D-F:?Sphyrna sp. 4. D.?Antero-lateral upper tooth KEB 1-123, D1. Lingual view, D2. Labial view; E.?Antero-lateral upper tooth KEB 1-124, E1. Labial view, E2. Lingual view; F. Lateral upper tooth KEB 1-125, lingual view.
FIGURE 15 in Diversity and renewal of tropical elasmobranchs around the Middle Eocene Climatic Optimum (MECO) in North Africa: New data from the lagoonal deposits of Djebel el Kébar, Central Tunisia
FIGURE 15. Distribution of Elasmobranch taxa within localities of KEB-1, Tunisia (KEB, this work) and El Gedida (EG), Baharia (Egypt, from Strougo et al., 2007 updated) with report of their occurences in the other late Middle – Late Eocene tropical assemblages from Egypt (MI, GE, BQ, QS). Frequencies of taxa are somewhat subjective due to the different sources and/or sampling methods applied. Black-Grey intensity indicating the fossil completeness between KEB/EG and the other localities due to uncertainty/resolution of taxonomic attributions (See systematic palaeontology for detail, black: certain to light: possible). (1) Medium-Large Carcharhinus sp. with serrated teeth, (2) as Misrichtys stromeri, (3) as Moerigaleus vitreodon, (4) as Nebrius blankenhormi, (5) as Nebrius sp., (6) refered to Odontorhytis bahariensis, (7) unnnamed species, (8) possibly as Taeniura sp., (9) two types in Fayum.
FIGURE 4. A-B in Diversity and renewal of tropical elasmobranchs around the Middle Eocene Climatic Optimum (MECO) in North Africa: New data from the lagoonal deposits of Djebel el Kébar, Central Tunisia
FIGURE 4. A-B: Carcharhinus kasserinensis nov. sp., A. Antero-lateral upper tooth of young specimen KEB 1-098, A1. Lingual view, A2. Labial view; B. Antero-lateral upper tooth of young specimen KEB 1-099, labial view. C-G: Carcharhinus frequens. C. Lateral upper tooth KEB 1-100, C1. Labial view, C2. Lingual view; D. Lateral upper tooth KEB 1-101, D1. Labial view, D2. Lingual view; E. Anterior lower tooth KEB 1-102, E1. Labial view, E2. Lingual view; F. Lateral lower tooth KEB 1-103, F1. Labial view, F2. Lingual view; G. Posterior lower tooth KEB 1-104, lingual view; HK: Misrichtys sp. H. Anterior lower tooth KEB 1-105, lingual view; I. Lateral upper tooth KEB 1-106, labial view; J. Posterior lower tooth KEB 1-107, j1. Labial view, J2. Lingual view; K. Lateral upper tooth KEB 1-108, labial view; L-R: Rhizoprionodon sp. L. Anterior upper tooth KEB 1-126, labial view; M. lateral upper tooth KEB 1-127, labial view; N. Lateral upper tooth KEB 1-128, labial view; O. Anterior lower tooth KEB 1-129, labial view; P. Lateral lower tooth KEB 1-130, P1. Labial view, P2. Lingual view; Q. Posterior lower tooth KEB 1-131, labial view; R. Antero-lateral lower tooth KEB 1-132, R1. Labial view, R2. Lingual view.
FIGURE 14 in An Early Neogene Elasmobranch fauna from the southern Caribbean (Western Venezuela)
FIGURE 14. Dietary preference composition of the elasmobranchs from the Cantaure Formation. Percentages do not include Carcharhinus spp., Myliobatiformes indet. and Chondrichthyes indet.
Figure 8 in Elasmobranchs from the Lower Triassic Sulphur Mountain Formation near Wapiti Lake (BC, Canada)
Figure 8. Wapitiodus homalorhizo sp. nov.: structure of fin spine in cross-sections (A–D) through the apical half of specimen UALVP 46528 (thin sections T1–3) and the external view of the apex of the fin spine in specimen UALVP 46529 (E, silicon peel dusted with NH4Cl). A, overview: note the large but secondarily obliterated, partly remodeled cavity and the large tubercles clearly delimited from the core of the fin spine by lines of arrested growth. B, note the couple of displaced and stacked tubercles in the left postero-lateral corner (as indicated in A) at a slightly lower level of the spine (thin section T3). C, note the internal structure in the posterolateral wall of the fin spine that is characteristic of ctenacanthoids. D, attempts at restoration of the cross-section through the apical third. E, note the well-spaced stellate tubercles (arrowhead 2), the absence of recurved denticles in the posterolateral wall (arrowhead 1, but also see Fig. 10 and the description of specimen UALVP 46528) and the partly preserved anterior rim (arrowhead 3).
FIGURE 13 in New records of elasmobranchs in the Bay of Bengal, Bangladesh: further taxonomic research is essential
FIGURE 13. Dorsal and ventral image of Mobula thurstoni from Cox's Bazar (Female juvenile).
FIGURE 15 in New records of elasmobranchs in the Bay of Bengal, Bangladesh: further taxonomic research is essential
FIGURE 15. Several specimens' dorsal and ventral image of Rhinobatos ranongensis from Chattogram.
FIGURE 9 in New records of elasmobranchs in the Bay of Bengal, Bangladesh: further taxonomic research is essential
FIGURE 9. Dorsal image of Pastinachus cf. sephen (Female juvenile. DW= 20.32cm).
FIGURE 7 in New records of elasmobranchs in the Bay of Bengal, Bangladesh: further taxonomic research is essential
FIGURE 7. Dorsal image of Pastinachus cf. ater from Cox's Bazar (Male, DW= 33.02 cm).
FIGURE 3 in New records of elasmobranchs in the Bay of Bengal, Bangladesh: further taxonomic research is essential
FIGURE 3. Dorsal and ventral image of Maculabatis bineeshi from Cox's Bazar (Male, DW= 43.18 cm).
FIGURE 2 in New records of elasmobranchs in the Bay of Bengal, Bangladesh: further taxonomic research is essential
FIGURE 2. Dorsal image of Brevitrygon heterura from Moheshkhali, Cox's Bazar.
FIGURE 4 in New records of elasmobranchs in the Bay of Bengal, Bangladesh: further taxonomic research is essential
FIGURE 4. Dorsal image of Maculabatis arabica from Cox's Bazar (Female, DW= 48.26 cm).
Carrillo-Briceño et al. 2018 (raw isotopic data) - Neogene Caribbean elasmobranchs: diversity, paleoecology and paleoenvironmental significance of the Cocinetas Basin assemblage (Guajira Peninsula, Colombia)
<p>The file contains the raw isotopic data for the article entitled '<strong>Neogene Caribbean elasmobranchs: diversity, paleoecology and paleoenvironmental significance of the Cocinetas Basin assemblage (Guajira Peninsula, Colombia)</strong>'. It includes the correction for the values first produced by our mass spectrometer and how the corrections were proceeded. Several runs were performed and these are detailed with comments and remarks. Any doubt or question about these corrections are welcomed by me, László Kocsis and Torsten Vennemann for discussion or further considerations.</p>
Fig. 14 in A new genus of rhinebothriidean cestodes from batoid elasmobranchs, with the description of five new species and two new combinations
Fig. 14. Scanning electron micrographs of Stillabothrium cadenati (Euzet, 1954) comb. n. from Zanobatus schoenleinii (Müller et Henle). A – scolex, letters indicate locations of other SEMs; B – bothridium; C – distal bothridial surface at rim; D – distal bothridial surface within loculus; E – distal bothridial surface within septa; F – proximal bothridial surface; G – strobila.
Fig. 16 in A new genus of rhinebothriidean cestodes from batoid elasmobranchs, with the description of five new species and two new combinations
Fig. 16. Light micrographs of terminal genitalia of Stillabothrium species, each with genital pore oriented left. A – Stillabothrium ashleyae sp. n. from Dasyatis biasa (Last, White et Naylor); B – Stillabothrium davidcynthiaorum sp. n. from Himantura gerrardi (Gray); C – Stillabothrium campbelli sp. n. from Himantura cf. pastinacoides; D – Stillabothrium hyphantoseptum sp. n. from Pastinachus solocirostris Last, Manjaji et Yearsley; E – Stillabothrium jeanfortiae sp. n. from Himantura australis Last, White et Naylor; F – Stillabothrium cadenati comb. n. from Zanobatus schoenleinii (Müller et Henle).
Fig. 11 in A new genus of rhinebothriidean cestodes from batoid elasmobranchs, with the description of five new species and two new combinations
Fig. 11. Scanning electron micrographs of Stillabothrium jeanfortiae sp. n. from Himantura australis Last, White et Naylor. A – scolex; letters indicate locations of other SEMs; B – distal bothridial surface in posterior borthridium; C – proximal bothridial surface with rim; D – proximal bothridial surface near rim; E – proximal bothridial surface; F – strobila.
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