Results 51 to 60 of about 1,230 (177)

Evolutionary Stability of the Shark Snout: Geometric Morphometrics of Ventral Facial Openings

Annals of the New York Academy of Sciences, Volume 1560, Issue 1, June 2026.
Landmark‐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.
Stefano Aicardi, Giacomo Rosa, Alessio Longo, Matteo Bozzo, Beatrice Risso, Elisa Damonte, Andrea Amaroli, Simona Candiani, Sara Ferrando   +8 more
wiley   +1 more source

Metacercarias del tipo Paramonilicaecum (Digenea: Didymozoidae), parásitos accidentales de elasmobranquios (Elasmobranchii) del golfo de México e identificación de metacercarias (Didymozoidae) de la Colección Nacional de Helmintos

Revista Mexicana de Biodiversidad, 2011
Como parte de un estudio sobre los helmintos parásitos de rayas (Elasmobranchii), se colectaron 12 ejemplares en 3 localidades del estado de Veracruz, México: Laguna de Tamiahua, Laguna de Tampamachoco y un arrecife de la costa del golfo de México.
Erick Rodríguez-Ibarra, Scott Monks, Griselda Pulido-Flores   +2 more
doaj   +1 more source

Reconstructing Early Human Subsistence in Near Oceania: New Insights From Matenkupkum and Matenbek

International Journal of Osteoarchaeology, Volume 36, Issue 3, Page 599-614, May/June 2026.
ABSTRACT The colonization of New Ireland ~44–40,000 years ago represents the earliest evidence of human occupation in Near Oceania. Yet, the precise impacts of climatic changes on subsistence strategies during the Late Pleistocene, Last Glacial Maximum, and Holocene remain poorly understood.
Joëlle den Toom, Glenn Summerhayes, Anne Ford, Karen Greig   +3 more
wiley   +1 more source

Coastal rocky reef fishes of Santa Catarina's northern islands, Brazil

Frontiers in Marine Science, 2015
The coast of the state of Santa Catarina only has non-biogenic reefs, i.e. rocky and artificial reefs, and is considered the geographic south limit for many reef fish species.
Johnatas Adelir Alves, Leonardo Schlögel Bueno, Diogo Augusto Moreira, Alberto Teodorico Correia, Alberto Teodorico Correia   +4 more
doaj   +1 more source

Multi‐Seasonal eDNA Metabarcoding Highlights a Resurgence in Fish Diversity Across a Severely Impacted Estuarine Ecosystem

Aquaculture, Fish and Fisheries, Volume 6, Issue 2, April 2026.
ABSTRACT Aquatic ecosystems have been in an alarming state of decline for decades. In particular, estuarine ecosystems have experienced long‐term declines in fish diversity due to factors such as habitat degradation, pollution and altered hydrology. Monitoring these systems is often limited by the difficulty and cost of conventional survey methods.
Jake M. Jackman, Naiara Guimarães Sales, Chiara Benvenuto, Andrea Drewitt, Andrew Wolfenden, Peter E. Robins, Ilaria Coscia, Allan D. McDevitt   +7 more
wiley   +1 more source

Shark teeth from Pirabas Formation (Lower Miocene), northeastern Amazonia, Brazil [PDF]

Boletim do Museu Paraense Emílio Goeldi. Ciências Naturais, 2009
The shark fauna (Chondrichthyes: Elasmobranchii) of Pirabas Formation is one of the most representative and diversified of the Neogene of South America.
Sue Anne Regina Ferreira Costa, Martha Richter, Peter Mann de Toledo, Heloísa Maria Moraes-Santos   +3 more
doaj  

Sawfishes in Brazil: A Historical Review

Aquatic Conservation: Marine and Freshwater Ecosystems, Volume 36, Issue 4, April 2026.
ABSTRACT Sawfishes of the genus Pristis are critically endangered rays with key ecological roles in aquatic ecosystems; however, they remain underrepresented in Brazilian scientific literature. This review presents a historical and bibliometric overview of sawfish literature in Brazil, highlighting temporal trends, geographic focus and thematic ...
Reysane de Alencar Sousa Silva, Vicente Vieira Faria, Patrícia Charvet   +2 more
wiley   +1 more source

Myocardial trabeculation in embryos of Scyliorhinus canicula (Elasmobranchii, Chondrichthyans)

The FASEB Journal, 2018
Currently, three types of ventricular myoarchitecture are recognized in vertebrates, namely compact, spongy (trabeculated) and mixed myocardium. Mixed myocardium, which has been recently proposed as the primitive condition in gnathostomes, is composed of two myocardial layers: an inner trabeculated and an outer compact one.
López-Unzu, Miguel A., Rodríguez, Cristina, Lorenzale, Miguel, Fernández-Corujo, Borja, Durán-Boyero, Ana Carmen   +4 more
openaire   +2 more sources

Zooarchaeological Analysis of an Atoll Assemblage From Central Micronesia

Archaeology in Oceania, Volume 61, Issue 1, Page 177-198, April 2026.
ABSTRACT There has been a dearth of archaeological research on atolls in the central‐eastern Caroline Islands of Micronesia. This has limited our understanding of pre‐contact subsistence and settlement strategies in these more marginal and remote environments, particularly in regards to zooarchaeological data.
Philippa Jorissen, Gabriel Sanchez, Scott M. Fitzpatrick   +2 more
wiley   +1 more source

Ocorrência de vertebrados holocênicos marinhos, Elasmobranchii e Cetacea, no "Sambaqui de Camboinhas", ltaipu, Niterói, estado do Rio de Janeiro

Revista de Arqueologia, 1986
O ''sambaqui de Camboinhas" foi descoberto no interior de uma "duna fóssil", dentro das cotas altimétricas de 7-8m acima do nível do mar, num trecho da Praia de ltaipu, Niterói, RJ.
Fausto Luiz de Souza Cunha, Antenor Leitão de Carvalho, Gustavo Wilson Alves Nunan   +2 more
doaj   +1 more source