Results 21 to 30 of about 524 (160)

New distributional and morphological data of two species of catsharks, genus Scyliorhinus Blainville, 1816 (Carcharhiniformes, Scyliorhinidae), from the western South Atlantic [PDF]

open access: yesCheck List, 2020
This study provides new distributional and morphological information for two recently described species of catsharks (Carcharhiniformes, Scyliorhinidae) from Brazil.
Stephani M. Lopes   +3 more
doaj   +3 more sources

The biology and ecology of the Pacific sharpnose shark Rhizoprionodon longurio

open access: yesEcology and Evolution, 2023
Amidst global declines in elasmobranch populations resulting predominantly from overfishing, the need to gather data regarding shark ecology is greater than ever.
Joel H. Gayford, Darren A. Whitehead
doaj   +1 more source

Sawfishes and Other Elasmobranch Assemblages from the Mio-Pliocene of the South Caribbean (Urumaco Sequence, Northwestern Venezuela). [PDF]

open access: yesPLoS ONE, 2015
The Urumaco stratigraphic sequence, western Venezuela, preserves a variety of paleoenvironments that include terrestrial, riverine, lacustrine and marine facies.
Jorge D Carrillo-Briceño   +4 more
doaj   +1 more source

New species and new records of camallanid nematodes (Nematoda, Camallanidae) from marine fishes and sea snakes in New Caledonia

open access: yesParasite, 2019
Recent examinations of camallanid nematodes (Camallanidae) from marine fishes off New Caledonia, collected in the years 2003–2011, revealed the presence of the following five new species of Procamallanus Baylis, 1923, all belonging to the subgenus ...
Moravec František, Justine Jean-Lou
doaj   +1 more source

New host and ocean records for Driocephalus cerebrinoxius (Sphyriidae, Siphonostomatoida) and a reconsideration of phylogeny within Sphyriidae. [PDF]

open access: yesActa Ichthyologica et Piscatoria, 2006
Background. Driocephalus cerebrinoxius is an unusual representative of an unusual family of parasitic copepods (Sphyriidae, Siphonostomatoida, Copepoda). This report documents new host and ocean records for D. cerebrinoxius and considers the phylogenetic
G.W. Benz   +4 more
doaj   +3 more sources

Characterization of the complete mitochondrial genome of the common smoothhound shark, Mustelus mustelus (Carcharhiniformes: Triakidae)

open access: yesMitochondrial DNA. Part B. Resources, 2018
We present the complete mitochondrial genome of the common smoothhound , Mustelus mustelus,which is 16,755 bp long, contains 13 protein-coding genes, 22 tRNA genes, 2 rRNA genes, and non-coding control region.
Kelvin L. Hull   +2 more
doaj   +1 more source

Morphology of the anterior vertebral region in elasmobranchs: special focus, Squatiniformes [PDF]

open access: yesFossil Record, 2011
The morphology of extant and extinct Squatiniformes is well conserved within this lineage, but differences are of consequence to character interpretations for phylogenetic analyses.
K. M. Claeson, A. Hilger
doaj   +5 more sources

Escamas de tubarões (Pisces: Chondrichthyes) da Formação Pirabas (Eomioceno), Pará, Brasil

open access: yesBoletim do Museu Paraense Emílio Goeldi. Ciências Naturais, 2008
A falta de posicionamento estratigráfico dos fósseis de tubarões até então coletados na Formação Pirabas dificultou a utilização dos mesmos em interpretações paleoecológicas e distribuição temporal.
Samantha Florinda Cecim Carvalho de Oliveira   +2 more
doaj   +1 more source

Repeated observations of cetaceans and carcharhiniformes associations in the Red Sea [PDF]

open access: yesMarine Biodiversity, 2015
Shark-cetacean aggregations and associations of false killer whales (Pseudorca crassidens) with other cetaceans have been reported previously (e.g., Heithaus 2001; Baird et al. 2008). However, this is the first description of nonaggressive associations of P. crassidens with noncetaceans. Here we report encounters of P.
Röthig, Till   +6 more
openaire   +2 more sources

Albinismo parcial en un embrión de tiburón puntas negras, Carcharhinus limbatus (Carcharhinidae: Chondrichthyes) del Pacífico oriental

open access: yesLatin American Journal of Aquatic Research, 2015
Se reporta el albinismo parcial de un embrión macho de tiburón de puntas negras, Carcharhinus limbatus, capturado en aguas costeras mexicanas del Pacífico oriental.
Francisco Sancho-Vazquez   +2 more
doaj   +1 more source

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