Results 41 to 50 of about 787 (184)

Dental crown morphological variation and heterodonty in carcharhiniform sharks

The Anatomical Record, EarlyView.
Abstract Elasmobranch teeth are highly mineralized structures that constitute the majority of the fossil record for this group. Despite their taxonomic and evolutionary significance, detailed descriptions of dental morphology remain scarce. The order Carcharhiniformes, the most diverse among sharks, comprises 304 valid species that display remarkable ...
Flávia Zanini, Karla D. A. Soares
wiley   +1 more source

Phage Diving: An Exploration of the Carcharhinid Shark Epidermal Virome

Viruses, 2022
The epidermal microbiome is a critical element of marine organismal immunity, but the epidermal virome of marine organisms remains largely unexplored. The epidermis of sharks represents a unique viromic ecosystem.
Ryan D. Hesse, Michael Roach, Emma N. Kerr, Bhavya Papudeshi, Laís F. O. Lima, Asha Z. Goodman, Lisa Hoopes, Mark Scott, Lauren Meyer, Charlie Huveneers, Elizabeth A. Dinsdale   +10 more
doaj   +1 more source

Testicular Morphology and Spermatogenesis in Potamotrygon motoro: Insights Into Reproduction of Freshwater Stingrays

Journal of Morphology, Volume 287, Issue 2, February 2026.
Electron microscopy of Potamotrygon motoro spermatozoa. a – Illustration of a schematic sperm cell depicting the helical head, intermediate piece (midpiece), and flagellum. b ‐ Helical heads (Hh) of spermatozoa inserted into the cytoplasm of Sertoli cells (S) through openings in the plasma membrane. Scales: 10 μm.
Maria Luiza Ribeiro Delgado, Patricia Postingel Quirino, Luciane Gomes‐Silva, Viktoriya Dzyuba, Borys Dzyuba, Alexandre Ninhaus‐Silveira, Rosicleire Veríssimo‐Silveira   +6 more
wiley   +1 more source

Morphology and paleoecology of a hybodontiform with serrated teeth, Priohybodus arambourgi, from the Late Jurassic of northeastern Brazil

The Anatomical Record, Volume 309, Issue 1, Page 5-32, January 2026.
Abstract Hybodontiformes was a diverse, successful, and important group of shark‐like chondrichthyans known from a variety of ecosystems. Some representatives of the order had a wide palaeogeographic distribution, as is the case with Priohybodus arambourgi. With a multicuspidate crown, P. arambourgi was the first hybodontiform to develop fully serrated
Estevan Eltink, Kelly Roberta da Silva, Marco Aurélio Gallo de França, Débora Melo Ferrer de Morais, Matías Soto, Christopher J. Duffin   +5 more
wiley   +1 more source

Defining ecological roles of sharks on coral reefs

Biological Reviews, Volume 100, Issue 6, Page 2707-2725, December 2025.
ABSTRACT Sharks have often been perceived to play a critical role in the dynamics of coral reef ecosystems globally. Yet, there is relatively little evidence to support this idea across all but a limited set of species and contexts. Research on the roles and importance of reef sharks has been complicated by logistical challenges in collecting data on ...
Natalie V. Klinard, Christopher G. Mull, Michael R. Heithaus, M. Aaron MacNeil   +3 more
wiley   +1 more source

Insights Into the Ecomorphology of the Blue Shark (Prionace glauca) in the Adriatic Sea (Central Mediterranean Sea)

Ecology and Evolution, Volume 15, Issue 11, November 2025.
This study examines how the morphology of Mediterranean blue sharks (Prionace glauca ) changes throughout their development. Using linear and geometric morphometrics, it reveals that juveniles and adults differ in fin and head shape, reflecting adaptations to different ecological and swimming demands.
P. Carbonara, A. Bellodi, M. Bottaro, G. Deplano, A. Mulas, C. Neglia, S. Niedermüller, G. Prato, L. Toomey, M. C. Follesa   +9 more
wiley   +1 more source

Histamine in Brazilian Foods: A Comprehensive Review of Occurrence and Risk Assessment for Intoxication and Intolerance

Food Science &Nutrition, Volume 13, Issue 11, November 2025.
Even though histamine plays an important role in human health, it has been associated with food intoxication and intolerance episodes. The most relevant, current state of knowledge regarding histamine's biochemical and health aspects is provided. Histamine levels are provided for 17 food groups, including 335 food types and 11,437 samples, allowing ...
Maria Beatriz A. Gloria, Fabiana B. Diniz, Bruno M. Dala‐Paula, Biane Philadelpho, José Eduardo Gonçalves, Ederlan S. Ferreira, Livia Simon Sarkadi   +6 more
wiley   +1 more source

Volitional Swimming Kinematics of Blacktip Sharks, Carcharhinus limbatus, in the Wild

Drones, 2020
Recent work showed that two species of hammerhead sharks operated as a double oscillating system, where frequency and amplitude differed in the anterior and posterior parts of the body. We hypothesized that a double oscillating system would be present in
Marianne E. Porter, Braden T. Ruddy, Stephen M. Kajiura   +2 more
doaj   +1 more source

Dental Morphology, Palaeoecology and Palaeobiogeographic Significance of a New Species of Requiem Shark (Genus Carcharhinus) from the Lower Miocene of Peru (East Pisco Basin, Chilcatay Formation)

Journal of Marine Science and Engineering, 2022
Nowadays, the requiem sharks comprise one of the most diverse and widespread families of selachians, i.e., Carcharhinidae. Among the carcharhinids, the genus Carcharhinus has the largest number of living species, namely, at least 35.
Alberto Collareta, René Kindlimann, Alessio Baglioni, Walter Landini, Giovanni Sarti, Alí Altamirano, Mario Urbina, Giovanni Bianucci   +7 more
doaj   +1 more source

When Competition Breaks the Rules: Feeding Frenzy as a Trigger for Unexpected Fatal Shark Predation Bites on a Human Sea‐User by Non Traumatogenic Carcharinids in the Oriental Mediterranean

Ethology, Volume 131, Issue 11, Page 260-264, November 2025.
Feeding frenzy may lead non‐traumatogenic shark species to predate a human, despite this not being an instinctive prey item. As a first step, an initial non‐predatory bite (not targetting the human as a prey) can trigger multiple feeding stimuli (mainly sounds and blood smelling) attracting sharks in the area.
Eric E. G. Clua, Kristian. J. Parton
wiley   +1 more source