Perceptions of ecosystem services provided by the landscapes of the coastal lagoon at the 1017 Ramsar site in Benin (West Africa)

Environmental Challenges, Journal Year: 2025, Volume and Issue: unknown, P. 101122 - 101122

Published: March 1, 2025

Language: Английский

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Brazilian Amazon Coast is an essential habitat for threatened and evolutionarily distinct sharks and rays

Marine Biology, Journal Year: 2025, Volume and Issue: 172(2)

Published: Jan. 31, 2025

Language: Английский

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Late Oligocene fishes (Chondrichthyes and Osteichthyes) from the Catahoula Formation in Wayne County, Mississippi, USA

European Journal of Taxonomy, Journal Year: 2025, Volume and Issue: 984, P. 1 - 131

Published: March 28, 2025

Isolated elasmobranch and teleost teeth, jaws, otoliths, scales, vertebrae, fin spines were recovered from the upper Oligocene (Chattian) Catahoula Formation in Wayne County, Mississippi, USA. A total of 13 551 specimens examined 12 340 these identified at least to ordinal level. These remains represent 49 unequivocal fish taxa, viz. 29 elasmobranchs 20 teleosts. The 3614 indicate that Carcharhiniformes is most diverse group Elasmobranchii, with taxa belonging five families. Orectolobiformes Lamniformes are represented by far fewer (three four, respectively). Carcharhinus acuarius (Probst, 1879) constitutes 49% number shark teeth our sample. Ten batoids have been within Myliobatiformes (seven taxa) Rhinopristiformes taxa). Partial durophagous myliobatids genera) abundant batoid remains, constituting 41% ray fossils. However, Dasyatidae Rhynchobatus cf. pristinus 1877) 36.5% 15.4%, respectively, identified. Herein, we erect new including Galeocerdo platycuspidatum sp. nov., Hemipristis intermedia Hypanus? heterodontus “Sphyrna” gracile robustum nov. sample includes over 9935 fossils, which 73% Nine bony solely jaw elements, or spines. Although otoliths much less common than other identifiable (409 versus roughly 8430, respectively), they allowed us identify four not known skeletal remains. Albulidae, Sciaenidae, Sparidae isolated but could ascertain whether various elements conspecific otolith-based species Sciaenidae (teeth, otoliths) dominate assemblage, 70% Our first occurrence Tetraodontidae Western Hemisphere. vertebrate assemblage study site indicates an estuarine depositional environment, consistent previous interpretations based on lithology. At disconformably overlies Paynes Hammock Limestone, believe disconformable contact locally represents Rupelian (early Oligocene)/Chattian (late Oligocene) boundary. fauna described herein therefore Chattian age.

Language: Английский

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The vicariant role of Caribbean formation in driving speciation in American loliginid squids: the case of Doryteuthis pealeii (Lesueur 1821)

Marine Biology, Journal Year: 2024, Volume and Issue: 171(4)

Published: Feb. 25, 2024

Language: Английский

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A Review of the Paleobiology of Some Neogene Sharks and the Fossil Records of Extant Shark Species

Diversity, Journal Year: 2024, Volume and Issue: 16(3), P. 147 - 147

Published: Feb. 26, 2024

In recent years, new findings and methods (stable isotopes of oxygen, zinc, nitrogen; 2D 3D modeling; geometric morphometric analyses the teeth) have enhanced our knowledge Neogene shark fauna its paleobiology. Several papers deal with large Otodus (Megaselachus) species, including construction a model, as well insights into lifestyle diet. addition, skeletal remains Carcharias gustrowensis, Carcharodon hastalis, Keasius parvus natural tooth set hubbelli been described in last 13 dentition species Carcharoides catticus, Megachasma applegatei, Parotodus benedenii has reconstructed. Stable isotope teeth from Araloselachus, Carcharias, Carcharodon, Galeocerdo, Hemipristris, Mitsukurina given trophic positions these genera during Neogene, preserved near prey animals (mammals) bite traces on provide direct evidence interactions. The shape, fossil locality, paleoenvironment used to better understand taxa Carcharhinus dicelmai, Megalolamna paradoxodon, Pachyscyllium dachiardii, P. distans. Among extant Galeorhinus galeus can be traced back Eocene. Alopias superciliosus, Rhincodon typus, possibly A. vulpinus Oligocene. Species present by Miocene include vulpinus, amblyrhynchoides, C. amblyrhynchos, albimarginatus, amboinensis, brachyurus, brevipinna, falciformis, glaucus, leucas, limbatus, longimanus, macloti, obscurus, perezi, sealei, Centrophorus granulosus, Cetorhinus maximus, Dalatias licha, Deania calcea, Galeocerdo cuvier, Glyphis glyphis, Heptranchias perlo, Isurus paucus, Lamna nasus, Negaprion brevirostris, Odontaspis ferox, Pseudocarcharias kamoharai, Sphyrna media, S. mokarran, carcharias. First appearing Pliocene are Scymnodon ringens, Somniosus rostratus, Zameus squamulosus. For some (Carcharias taurus, Hexanchus griseus, oxyrinchus, Notorynchus cepedianus, zygaena), it is not clear whether assigned represent same species. application more taxa, detailed search for fossils, (especially those minute-sized will further enhance evolution paleobiology sharks.

Language: Английский

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High resolution in turbid waters: Ampullae of lorenzini in the daggernose sharkCarcharhinus oxyrhynchus(Valenciennes, 1839) (Elasmobranchii: Carcharhinidae)

Journal of Fish Biology, Journal Year: 2023, Volume and Issue: unknown

Published: Oct. 11, 2023

The present work aimed to analyze the distribution of electrosensory pores Daggernose Shark Carcharhinus oxyrhynchus identifying organ's importance in natural history species. By examining photographs and digital microscope videos, we found that C. possesses highest abundance among Carcharhiniformes. This suggests a well-developed electroreceptor system, which may have maximized its evolutionary success high turbidity environments. Furthermore, as morphologically derived species, comprises more complex specialized system. Notably, species exhibits ontogenetic variation pore abundance, highlighting high-resolution system for adults. higher density ventral region indicates preference benthic prey, despite also feeding on pelagic items. Moreover, has snout, emphasizes elongated snout expands electroreception search area coverage. Evolutionary convergence was observed development shares characteristics with phylogenetically unrelated

Language: Английский

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Almost half of the Gymnura van Hasselt, 1823 species are unknown: Phylogeographic inference as scissors for cutting the hidden Gordian knot and clarify their conservation status

Journal of Systematics and Evolution, Journal Year: 2023, Volume and Issue: 62(4), P. 715 - 738

Published: Nov. 5, 2023

Abstract Gymnurid rays are found in tropical, subtropical, and temperate regions around the world, where they associated with sandy or muddy bottoms coastal areas, being easily distinguished from other by width of disc. In recent years, systematics this family have been revised extensively. However, there has no comprehensive molecular review based on an adequate sample species localities, which may obscured presence distinct evolutionary lineages. The present study was samples 12 13 valid genus Gymnura , were used for a multilocus reconstruction history Gymnuridae. Our results indicate existence several cryptic gymnurid lineages, within micrura lessae altavela poecilura . Also, we that only half compose known, as well their conservation status. analyses also gymnurids originated during Paleocene, events dispersal vicariance occurring through formation oceanographic barriers, diversification peaking Oligocene Miocene. reinforce need revision family, particular, widely distributed considered taxa, but may, fact, represent different species. inadequate classification diversity negative implications development effective measures.

Language: Английский

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The shark and ray teeth of the Lower Miocene (Upper Marine Molasse) from Ballendorf, Baden-Württemberg, Southern Germany

Palaeobiodiversity and Palaeoenvironments, Journal Year: 2023, Volume and Issue: 104(1), P. 153 - 180

Published: Aug. 3, 2023

Abstract In an abandoned sand pit near Ballendorf (Alb-Donau District, Baden-Württemberg), sediments of the Upper Marine Molasse (Lower Miocene) are present. these sediments, 39 shark and ray species belonging to 29 genera were identified ( Aetobatus, Alopias, Araloselachus, Carcharhinus, Carcharias , Centrophorus, Chaenogaleus, Dasyatis, Galeocerdo, Hemipristis, Iago, Isistius, Keasius, Notorynchus, Pachyscyllium, Paragaleus, Physogaleus, Pristiophorus, Raja, Rhinobatos, Rhinoptera, Rhizoprionodon, Rhynchobatus, Scyliorhinus, Sphyrna, Squalus, Squatina Taeniurops, Triakis ). However, in this paper we only illustrate describe 23 taxa not already discussed previous publications on deposits Äpfingen, Rengetsweiler Ursendorf, apart from two exceptions: teeth jaw positions previously illustrated, specimens that better preserved than those publications. Specimens determined as “sp.” illustrated because it cannot be ruled out they represent different ones published earlier. Nearly all found have Recent relatives; Keasius Physogaleus extinct. Most recovered lived or bottom shelf region. Alopias possibly also higher water column. With Isistius a taxon living oceanic realm was present, representatives Centrophorus live deeper waters. fed invertebrates and/or fishes; ectoparasite. Additionally, generalist feeders Galeocerdo Notorynchus ) one filter feeder identified. The crassidens which is common Molasse, verified. Other fossils deposit include remnants odontocete cetaceans, molluscs, balanid barnacles, algae, terrestrial mammals. palaeoenvironment warm, shallow-water habitat. Based greater proximity palaeo-coastline, depth probably less other deposits.

Language: Английский

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Mitochondrial Genome and Phylogenetic Analysis of the Narrownose Smooth-Hound Shark Mustelus schmitti Springer, 1939

Animals, Journal Year: 2024, Volume and Issue: 14(23), P. 3396 - 3396

Published: Nov. 25, 2024

Southern Brazil is home to a large biodiversity of elasmobranchs from the Brazilian coast. Several genera and species small sharks Triakidae family live in this marine environment. Studies on these shark are scarce, with few genetic data little information animal population structures. The present study aimed sequence complete mitochondrial genome (mtDNA) endangered

Language: Английский

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A Review of the Palaeobiology of Some Neogene Sharks and the Fossil Record of Extant Shark Species

Published: Dec. 20, 2023

In the last years, new findings and methods (stable isotopes of oxygen, zinc nitrogen, 2D 3D modelling, geometric morphometric analyses teeth) have enhanced our knowledge Neogene shark fauna its palaeobiology. Several papers deal with large Otodus (Megselachus) species, including construction a model as well insights into lifestyle diet. addition, skeletal remains Carcharias gustrowensis, Carcharodon hastalis, Keasius parvus natural tooth set hubbelli been described in 13 dentition species Carcharoides catticus, Megachasma applegatei Parotodus benedenii reconstructed. Stable isotope teeth from Araloselachus, Carcharias, Carcharodon, Galeocerdo, Hemipristris, Mitsukurina given trophic position these genera during Neogene, preserved near prey animals (mammals) bite traces on provide direct evidence interactions. Tooth shape, fossil locality palaeoenvironment used to better understand taxa Carcharhinus dicelmai, Megalolamna paradoxodon, Pachyscyllium dachiardii P. distans. Among extant Galeorhinus galeus can be traced back Eocene. The following Oligocene: ?Alopias superciliosus, Rhincodon typus. Species already present Miocene include: Alopias vulpinus, amblyrhynchoides, C. amblyrhynchos, albimarginatus, amboinensis, brachyurus, brevipinna, falciformis, glaucus, leucas, limbatus, longimanus, macloti, obscurus, perezi, sealei, ?Carcharodon carcharias, Centrophorus granulosus, Cetorhinus maximus, Dalatias licha, Deania calcea, Galeocerdo cuvier, , Glyphis glyphis, Heptranchias perlo, Isurus paucus, Lamna nasus, Negaprion brevirostris, Odontaspis ferox, Pseudocarcharias kamoharai, Sphyrna media, S. mokarran. First appearing Pliocene are: Scymnodon ringens, Somniosus rostratus, Zameus squamulosus. For some (Carcharias taurus, Hexanchus griseus, oxyrinchus, Notorynchus cepedianus, zygaena) it is not clear if assigned represent same species. Applying more taxa, detailed search for fossils, (especially those minute-sized will further enhance evolution palaeobiology sharks.

Language: Английский

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