Reappraisal of the extinct barbelthroat shark †Bavariscyllium and the nebulous origin of carcharhiniform galeomorphs [PDF]
Communications BiologyWe present a revised diagnosis of the extinct galeomorph shark †Bavariscyllium based on dental and skeletal material from the Upper Jurassic of Germany and test its purported carcharhiniform affinity through morphometric and phylogenetic analyses ...
Sebastian Stumpf +10 more
doaj +5 more sources
Evolutionary Stability of the Shark Snout: Geometric Morphometrics of Ventral Facial Openings. [PDF]
Ann N Y Acad SciLandmark‐based geometric morphometrics of 453 shark species reveal that ventral head morphology is conserved across Selachii. Morphospace and ancestral reconstructions support strong phylogenetic control and limited divergence from ancestral conditions.
Aicardi S +8 more
europepmc +2 more sources
Ion Torrent data for the genome assembly and phylogenomic placement of mitochondrial genomes with a focus on houndsharks (Chondrichthyes: Triakidae) [PDF]
Data in BriefHere, we present, for the first time, the Ion TorrentⓇ next-generation sequencing (NGS) data for five houndsharks (Chondrichthyes: Triakidae), which include Galeorhinus galeus (number of bases pairs (bp) 17,487; GenBank accession number ON652874 ...
Jessica C. Winn +2 more
doaj +2 more sources
Combining palaeontological and neontological data shows a delayed diversification burst of carcharhiniform sharks likely mediated by environmental change [PDF]
Scientific Reports, 2022 Estimating deep-time species-level diversification processes remains challenging. Both the fossil record and molecular phylogenies allow the estimation of speciation and extinction rates, but each type of data may still provide an incomplete picture of ...
Baptiste Brée +2 more
doaj +2 more sources
Habitat Availability, Jurassic and Cretaceous Origins of the Deep-Bodied Shark Morphotype and the Rise of Pelagic Sharks. [PDF]
Ecol EvolWe find support for a benthic origin of sharks, with four discrete transitions towards pelagic‐type morphology occurring during the Jurassic and Cretaceous. Increased habitat availability driven by biotic and abiotic environmental change may have driven shifts towards pelagic‐type morphology. These results may help explain discordance between molecular
Gayford JH +5 more
europepmc +2 more sources
Phylogeny explains capture mortality of sharks and rays in pelagic longline fisheries: a global meta-analytic synthesis [PDF]
Scientific Reports, 2022 Apex and mesopredators such as elasmobranchs are important for maintaining ocean health and are the focus of conservation efforts to mitigate exposure to fishing and other anthropogenic hazards.
Eric Gilman +6 more
doaj +2 more sources
The Phenomenon of Piebaldism in Sharks: A Review of Global Sightings and Patterns. [PDF]
Ecol EvolChromatic disorders like piebaldism—a rare form of leucism causing partial pigment loss—have been documented in 25 wild shark cases across 17 species and 11 families, with varying anatomical distribution. This study compiles published and unpublished records to better understand the taxonomic and geographical spread of piebaldism and its potential ...
Whitehead DA +9 more
europepmc +2 more sources
Parturition time for the Blacktip shark, Carcharhinus limbatus (Carcharhiniformes: Carcharhinidae), in Southwestern Atlantic [PDF]
Neotropical Ichthyology, 2020 The determination of the period of parturition and identification of nursery areas are fundamental for the management and conservation of a fishing resource.
Jones Santander Neto, Leandro Yokota
exaly +3 more sources
First record of albinism in the swell shark, Cephaloscyllium ventriosum (Elasmobranchii: Carcharhiniformes: Scyliorhinidae) [PDF]
Acta Ichthyologica Et Piscatoria, 2017 We report the first record of albinism in the swell shark, Cephaloscyllium ventriosum (Garman, 1880). The specimen was caught off the southern part of the Baja California Peninsula, Mexico. The shark had no skin pigmentation and golden-coloured eyes. The
Edgar Eduardo Becerril-Garcia +2 more
exaly +4 more sources
Extensive MHC class IIβ diversity across multiple loci in the small-spotted catshark (Scyliorhinus canicula) [PDF]
Scientific Reports, 2023 The major histocompatibility complex (MHC) is a multigene family responsible for pathogen detection, and initiation of adaptive immune responses. Duplication, natural selection, recombination, and their resulting high functional genetic diversity spread ...
Arnaud Gaigher +6 more
doaj +2 more sources