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Gregoire Metais - One of the best experts on this subject based on the ideXlab platform.
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new tropical carcharhinids chondrichthyes Carcharhiniformes from the late eocene early oligocene of balochistan pakistan paleoenvironmental and paleogeographic implications
Journal of Southeast Asian Earth Sciences, 2007Co-Authors: Sylvain Adnet, Pierreolivier Antoine, S Hassan R Baqri, Jeanyves Crochet, Laurent Marivaux, Jeanloup Welcomme, Gregoire MetaisAbstract:New selachians (sharks and rays) have been collected from several late Eocene and early Oligocene marine localities in the Bugti Hills (Balochistan, Pakistan). Two new species of Requiem sharks (close to the Recent ?Bull shark?) are described : Carcharhinus balochensis and Carcharhinus perseus. The rest of the fauna is notable for the strong representation of Carcharhiniformes. These selachian faunas represent a unique tropical association for the Oligocene period and one of the first modern tropical selachian faunas, with modern taxa such as the two new species of ?Bull sharks?, Negaprion sp. and one of the first occurrences of Sphyrna sp. Moreover, these faunas permit paleoenvironmental interpretation of adjacent land masses. The relatively modern aspect of these faunas, compared with other contemporaneous and younger selachian associations from Atlantic and Mediterranean seas, suggests biogeographic isolation of selachian communities living in eastern and western parts of the Tethys before its final closure during the early-middle Miocene.
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New tropical carcharhinids (chondrichthyes, Carcharhiniformes) from the late Eocene early Oligocene of Balochistan, Pakistan: Paleoenvironmental and paleogeographic implications
Journal of Southeast Asian earth sciences, 2007Co-Authors: Sylvain Adnet, Jeanyves Crochet, Laurent Marivaux, Jeanloup Welcomme, P.-o. Antoine, S. R. Hassan Baqri, Gregoire MetaisAbstract:New selachians (sharks and rays) have been collected from several late Eocene and early Oligocene marine localities in the Bugti Hills (Balochistan, Pakistan). Two new species of Requiem sharks (close to the Recent ?Bull shark?) are described : Carcharhinus balochensis and Carcharhinus perseus. The rest of the fauna is notable for the strong representation of Carcharhiniformes. These selachian faunas represent a unique tropical association for the Oligocene period and one of the first modern tropical selachian faunas, with modern taxa such as the two new species of ?Bull sharks?, Negaprion sp. and one of the first occurrences of Sphyrna sp. Moreover, these faunas permit paleoenvironmental interpretation of adjacent land masses. The relatively modern aspect of these faunas, compared with other contemporaneous and younger selachian associations from Atlantic and Mediterranean seas, suggests biogeographic isolation of selachian communities living in eastern and western parts of the Tethys before its final closure during the early-middle Miocene.
Sylvain Adnet - One of the best experts on this subject based on the ideXlab platform.
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Middle Eocene vertebrates from the sabkha of Gueran, Atlantic coastal basin, Saharan Morocco, and their peri-African correlations
Comptes Rendus Geoscience, 2018Co-Authors: Samir Zouhri, Sylvain Adnet, Estelle Bourdon, Bouziane Khalloufi, Ayoub Amane, Najia Elboudali, Stéphane Jouve, Jean-claude Rage, Philip D. Gingerich, Abdelhadi KaoukayaAbstract:Abstract The sabkha of Gueran in the Southwest Moroccan Sahara has yielded a rich and diverse fauna of late middle Eocene vertebrates that include the world's richest Bartonian age archaeocete assemblage. Archeocete remains were described previously and here we report on the rest of the vertebrate fauna. The Gueran fauna includes abundant chondrichthyan species belonging to Lamniformes, Carcharhiniformes and Rhinopristiformes, and actinopterygian assemblage consisting of Cylindracanthus, of a siluriform, and of Perciformes. Turtles are represented by at least two marine taxa referred to as Cheloniidae and Dermochelyidae. Crocodylian remains belong to at least two longirostrine species, including gavialoid remains. Snakes are represented by Pterosphenus cf. schweinfurthi (Palaeophiidae). Seabirds are represented by a pseudo-toothed bird (Pelagornithidae). The avian fossil belonged to a gigantic soaring bird and constitutes the earliest occurrence of the genus Pelagornis. The presence of proboscideans is attested by dental fragments. This fossil assemblage from Gueran shows affinities with those of the Eocene beds of Egypt and Libya. The numerous shared taxa support a close biogeographical connection between faunas from southeastern and southwestern coasts of the Mediterranean Sea.
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new tropical carcharhinids chondrichthyes Carcharhiniformes from the late eocene early oligocene of balochistan pakistan paleoenvironmental and paleogeographic implications
Journal of Southeast Asian Earth Sciences, 2007Co-Authors: Sylvain Adnet, Pierreolivier Antoine, S Hassan R Baqri, Jeanyves Crochet, Laurent Marivaux, Jeanloup Welcomme, Gregoire MetaisAbstract:New selachians (sharks and rays) have been collected from several late Eocene and early Oligocene marine localities in the Bugti Hills (Balochistan, Pakistan). Two new species of Requiem sharks (close to the Recent ?Bull shark?) are described : Carcharhinus balochensis and Carcharhinus perseus. The rest of the fauna is notable for the strong representation of Carcharhiniformes. These selachian faunas represent a unique tropical association for the Oligocene period and one of the first modern tropical selachian faunas, with modern taxa such as the two new species of ?Bull sharks?, Negaprion sp. and one of the first occurrences of Sphyrna sp. Moreover, these faunas permit paleoenvironmental interpretation of adjacent land masses. The relatively modern aspect of these faunas, compared with other contemporaneous and younger selachian associations from Atlantic and Mediterranean seas, suggests biogeographic isolation of selachian communities living in eastern and western parts of the Tethys before its final closure during the early-middle Miocene.
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New tropical carcharhinids (chondrichthyes, Carcharhiniformes) from the late Eocene early Oligocene of Balochistan, Pakistan: Paleoenvironmental and paleogeographic implications
Journal of Southeast Asian earth sciences, 2007Co-Authors: Sylvain Adnet, Jeanyves Crochet, Laurent Marivaux, Jeanloup Welcomme, P.-o. Antoine, S. R. Hassan Baqri, Gregoire MetaisAbstract:New selachians (sharks and rays) have been collected from several late Eocene and early Oligocene marine localities in the Bugti Hills (Balochistan, Pakistan). Two new species of Requiem sharks (close to the Recent ?Bull shark?) are described : Carcharhinus balochensis and Carcharhinus perseus. The rest of the fauna is notable for the strong representation of Carcharhiniformes. These selachian faunas represent a unique tropical association for the Oligocene period and one of the first modern tropical selachian faunas, with modern taxa such as the two new species of ?Bull sharks?, Negaprion sp. and one of the first occurrences of Sphyrna sp. Moreover, these faunas permit paleoenvironmental interpretation of adjacent land masses. The relatively modern aspect of these faunas, compared with other contemporaneous and younger selachian associations from Atlantic and Mediterranean seas, suggests biogeographic isolation of selachian communities living in eastern and western parts of the Tethys before its final closure during the early-middle Miocene.
David Ward - One of the best experts on this subject based on the ideXlab platform.
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sharks of the order Carcharhiniformes from the british coniacian santonian and campanian upper cretaceous
Palaeontology, 2008Co-Authors: Charlie J Underwood, David WardAbstract:Abstract: Bulk sampling of phosphate-rich horizons within the British Coniacian to Campanian (Upper Cretaceous) yielded very large samples of shark and ray teeth. All of these samples yielded teeth of diverse members of the Carcharhiniformes, which commonly dominate the fauna. The following species are recorded and described: Pseudoscyliorhinus reussi (Herman, 1977) comb. nov., Crassescyliorhinus germanicus (Herman, 1982) gen. nov., Scyliorhinus elongatus (Davis, 1887), Scyliorhinus brumarivulensis sp. nov., ?Palaeoscyllium sp., Prohaploblepharus riegrafi (Muller, 1989) gen. nov., ?Cretascyliorhinus sp., Scyliorhinidae incertae sedis 1, Scyliorhinidae incertae sedis 2, Pteroscyllium hermani sp. nov., Protoscyliorhinus sp., Leptocharias cretaceus sp. nov., Palaeogaleus havreensisHerman, 1977, Paratriakis subserratus sp. nov., Paratriakis tenuis sp. nov., Paratriakis sp. indet. and ?Loxodon sp. Taxa belonging to the families ?Proscylliidae, Leptochariidae and Carcharhinidae are described from the Cretaceous for the first time. The evolutionary and palaeoecological implications of these newly recognised faunas are discussed.
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SHARKS OF THE ORDER Carcharhiniformes FROM THE BRITISH CONIACIAN, SANTONIAN AND CAMPANIAN (UPPER CRETACEOUS)
Palaeontology, 2008Co-Authors: Charlie J Underwood, David WardAbstract:Bulk sampling of phosphate-rich horizons within the British Coniacian to Campanian (Upper Cretaceous) yielded very large samples of shark and ray teeth. All of these samples yielded teeth of diverse members of the Carcharhiniformes, which commonly dominate the fauna. The following species are recorded and described: Pseudoscyliorhinus reussi (Herman, 1977) comb. nov., Crassescyliorhinus germanicus (Herman, 1982) gen. nov., Scyliorhinus elongatus (Davis, 1887), Scyliorhinus brumarivulensis sp. nov., ? Palaeoscyllium sp., Prohaploblepharus riegrafi (Müller, 1989) gen. nov., ? Cretascyliorhinus sp., Scyliorhinidae inc. sedis 1, Scyliorhinidae inc. sedis 2, Pteroscyllium hermani sp. nov., Protoscyliorhinus sp., Leptocharias cretaceus sp. nov., Palaeogaleus havreensis Herman, 1977, Paratriakis subserratus sp. nov., Paratriakis tenuis sp. nov., Paratriakis sp. indet. and ? Loxodon sp. Taxa belonging to the families ?Proscylliidae, Leptochariidae, and Carcharhinidae are described from the Cretaceous for the first time. The evolutionary and palaeoecological implications of these newly recognised faunas are discussed
Soares, Karla D. A. - One of the best experts on this subject based on the ideXlab platform.
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FIGURE 18 in The catshark genus Scyliorhinus (Chondrichthyes: Carcharhiniformes: Scyliorhinidae): taxonomy, morphology and distribution
2019Co-Authors: Soares, Karla D. A., De, Marcelo R.Abstract:FIGURE 18. Map showing the geographic distribution of Scyliorhinus canicula based on material examined in this study. Black star indicates the neotype locality
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FIGURE 12 in The catshark genus Scyliorhinus (Chondrichthyes: Carcharhiniformes: Scyliorhinidae): taxonomy, morphology and distribution
2019Co-Authors: Soares, Karla D. A., De, Marcelo R.Abstract:FIGURE 12. Neotype of Scyliorhinus canicula (Linnaeus, 1758), NHMUK 1866.9.10.4, male, 417.1 mm TL (Nice, France). A, dorsal view; B, lateral view. Scale bar = 20 mm
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FIGURE 15 in The catshark genus Scyliorhinus (Chondrichthyes: Carcharhiniformes: Scyliorhinidae): taxonomy, morphology and distribution
2019Co-Authors: Soares, Karla D. A., De, Marcelo R.Abstract:FIGURE 15. Teeth of Scyliorhinus canicula; labial view. NHMUK 1970.12.2.1–4, female, 413.6 mm TL (Malaga Bay, Spain). a, anterior tooth; c, commissural; l, lateral; ps, parassymphysial. Scale bar = 100 µm
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FIGURE 31 in The catshark genus Scyliorhinus (Chondrichthyes: Carcharhiniformes: Scyliorhinidae): taxonomy, morphology and distribution
2019Co-Authors: Soares, Karla D. A., De, Marcelo R.Abstract:FIGURE 31. Dermal denticles of Scyliorhinus cervigoni, USNM 221599, male, 283 mm TL (Guinea Bissau, 10°44'N, 17°06'W). A, region above pectoral fin base; B, region below first dorsal fin origin; C, region below second dorsal fin insertion. Scale bar = 250 µm
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FIGURE 7 in The catshark genus Scyliorhinus (Chondrichthyes: Carcharhiniformes: Scyliorhinidae): taxonomy, morphology and distribution
2019Co-Authors: Soares, Karla D. A., De, Marcelo R.Abstract:FIGURE 7. Dermal denticles of Scyliorhinus boa, USNM 221563, male 348 mm TL (Colombia, 12°17'N, 72°40'W). A, D, region above pectoral fin base; B, E, region below first dorsal fin origin; C, F, region below second dorsal fin insertion. Scale = 250 µm
De, Marcelo R. - One of the best experts on this subject based on the ideXlab platform.
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FIGURE 18 in The catshark genus Scyliorhinus (Chondrichthyes: Carcharhiniformes: Scyliorhinidae): taxonomy, morphology and distribution
2019Co-Authors: Soares, Karla D. A., De, Marcelo R.Abstract:FIGURE 18. Map showing the geographic distribution of Scyliorhinus canicula based on material examined in this study. Black star indicates the neotype locality
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FIGURE 12 in The catshark genus Scyliorhinus (Chondrichthyes: Carcharhiniformes: Scyliorhinidae): taxonomy, morphology and distribution
2019Co-Authors: Soares, Karla D. A., De, Marcelo R.Abstract:FIGURE 12. Neotype of Scyliorhinus canicula (Linnaeus, 1758), NHMUK 1866.9.10.4, male, 417.1 mm TL (Nice, France). A, dorsal view; B, lateral view. Scale bar = 20 mm
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FIGURE 15 in The catshark genus Scyliorhinus (Chondrichthyes: Carcharhiniformes: Scyliorhinidae): taxonomy, morphology and distribution
2019Co-Authors: Soares, Karla D. A., De, Marcelo R.Abstract:FIGURE 15. Teeth of Scyliorhinus canicula; labial view. NHMUK 1970.12.2.1–4, female, 413.6 mm TL (Malaga Bay, Spain). a, anterior tooth; c, commissural; l, lateral; ps, parassymphysial. Scale bar = 100 µm
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FIGURE 31 in The catshark genus Scyliorhinus (Chondrichthyes: Carcharhiniformes: Scyliorhinidae): taxonomy, morphology and distribution
2019Co-Authors: Soares, Karla D. A., De, Marcelo R.Abstract:FIGURE 31. Dermal denticles of Scyliorhinus cervigoni, USNM 221599, male, 283 mm TL (Guinea Bissau, 10°44'N, 17°06'W). A, region above pectoral fin base; B, region below first dorsal fin origin; C, region below second dorsal fin insertion. Scale bar = 250 µm
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FIGURE 7 in The catshark genus Scyliorhinus (Chondrichthyes: Carcharhiniformes: Scyliorhinidae): taxonomy, morphology and distribution
2019Co-Authors: Soares, Karla D. A., De, Marcelo R.Abstract:FIGURE 7. Dermal denticles of Scyliorhinus boa, USNM 221563, male 348 mm TL (Colombia, 12°17'N, 72°40'W). A, D, region above pectoral fin base; B, E, region below first dorsal fin origin; C, F, region below second dorsal fin insertion. Scale = 250 µm