Results 21 to 30 of about 1,226 (194)

Three-dimensional fossils of a Cretaceous collared carpet shark (Parascylliidae, Orectolobiformes) shed light on skeletal evolution in galeomorphs [PDF]

open access: yesRoyal Society Open Science
A rich fossil record of teeth shows that many living shark families’ origins lie deep in the Mesozoic. Skeletal fossils of the sharks to whom these teeth belonged are far rarer and when they are preserved are often flattened, hindering understanding of ...
Richard P. Dearden   +7 more
doaj   +2 more sources

Apristurus iterum, a new shark discovered based on egg case morphology and sequence data obtained from a formalin-fixed specimen. [PDF]

open access: yesJ Fish Biol
Abstract Apristurus iterum, a new species of deepwater catshark, is described from northeastern Australia. The new species is diagnosed through examination of its unique egg case morphology based on a single whole gravid female specimen and 10 egg cases deposited in different Australian ichthyological collections.
White WT, O'Neill HL, Jayasinghe SA.
europepmc   +2 more sources

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

Parturition time for the Blacktip shark, Carcharhinus limbatus (Carcharhiniformes: Carcharhinidae), in Southwestern Atlantic [PDF]

open access: yesNeotropical 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   +2 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

Scyliorhinus hachijoensis, a new species of catshark from the Izu Islands, Japan (Carcharhiniformes: Scyliorhinidae)

open access: yes, 2022
Ito, Nanami, Fujii, Miho, Nohara, Kenji, Tanaka, Sho (2022): Scyliorhinus hachijoensis, a new species of catshark from the Izu Islands, Japan (Carcharhiniformes: Scyliorhinidae). Zootaxa 5092 (3): 331-349, DOI: https://doi.org/10.11646/zootaxa.5092.3.
Ito, Nanami   +3 more
core   +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

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