Results 11 to 20 of about 5,535 (176)

Sex Determination in Sponges. [PDF]

Mol Reprod Dev
ABSTRACT Sex determination in Porifera remains one of the least understood aspects of early metazoan biology despite the group's key phylogenetic position. Sponges display exceptional diversity in sexual systems—ranging from stable gonochorism to sequential hermaphroditism and sex reversal—yet lack morphological dimorphism and any discrete gonadal ...
Lorente-Sorolla JM, Riesgo A.
europepmc   +2 more sources

The complete mitochondrial genome of the invasive cyanobacteriosponge Terpios hoshinota (Demospongiae, Suberitida, Suberitidae)

Mitochondrial DNA. Part B. Resources, 2023
The cyanobacteriosponge Terpios hoshinota occurs on tropical reefs throughout the Indo-Pacific. The species encrusts live coral, and other benthos, and is considered a pest species that can threaten the health and productivity of locally native benthic ...
Zoe T. Richards, Hiroki Kise, Katrina M. West   +2 more
doaj   +1 more source

Taxonomic notes on Poecillastra sponges (Astrophorida: Pachastrellidae), with the description of three new bathyal southeastern Pacific species

Scientia Marina, 2011
Three new species of Poecillastra are described here from bathyal waters off central Chile. P. antonbruunae n. sp. is diagnosed by its two categories of oxeas, the smaller one only up to 621 μm in length, and calthrops as the sole triaene category; P ...
Mariana S. Carvalho, Ruth Desqueyroux-Faúndez, Eduardo Hajdu   +2 more
doaj   +1 more source

Foundation Species Abundance Influences Food Web Topology on Glass Sponge Reefs

Frontiers in Marine Science, 2020
Foundation species support communities across a wide range of ecosystems. Non-trophic interactions are considered the primary way foundation species influence communities, with their trophic interactions having little impact on community structure.
Stephanie K. Archer, Stephanie K. Archer, Amanda S. Kahn, Amanda S. Kahn, Mary Thiess, Mary Thiess, Lauren Law, Sally P. Leys, Sophia C. Johannessen, Craig A. Layman, Lily Burke, Anya Dunham   +11 more
doaj   +1 more source

Acarnidae (Porifera: Demospongiae: Poecilosclerida) from the Mexican Pacific Ocean with the description of six new species

Scientia Marina, 2013
The family Acarnidae is characterized by sponges with ectosomal diactinal spicules and choanosomal monactinal spicules. Microscleres include palmate isochelae, toxas and echinating acanthostyles.
Jose Maria Aguilar-Camacho, Jose Luis Carballo, Jose Antonio Cruz-Barraza   +2 more
doaj   +1 more source

Alternative neural systems: What is a neuron? (Ctenophores, sponges and placozoans)

Frontiers in Cell and Developmental Biology, 2022
How to make a neuron, a synapse, and a neural circuit? Is there only one ‘design’ for a neural architecture with a universally shared genomic blueprint across species?
Leonid L. Moroz, Leonid L. Moroz, Daria Y. Romanova   +2 more
doaj   +1 more source

Novos registros da Esponja-de-águadoce Oncosclera jewelli (Volkmer, 1963): Subsídios para a conservação do Rio Camisas, Rio Grande do Sul, Brasil

Revista Eletrônica Científica da UERGS, 2017
Em 150 milhões de anos, esponjas se adaptaram a diferentes nichos, incluindo águas continentais. Entre 2012 e 2013 realizamos 12 expedições buscando registros de Oncosclera jewelli no nordeste do Rio Grande do Sul, Brasil.
Rodrigo Cambará PRINTES, Clódis de Oliveira ANDRADES-FILHO, Aline Scheid STOFFEL, Júlio César da Silva STELMACH, Maria da Conceição TAVARES-FRIGO   +4 more
doaj   +1 more source

Uncovering Novel Anti-Lung Cancer Compounds: Insights from Marine Sponge-Derived Agents: A Bibliometric Review [PDF]

Iranian Journal of Medical Sciences
Background: Lung cancer remains a leading cause of cancer-related mortality, necessitating improved treatment strategies. This study collectively highlights the valuable potential of marine sponges as a source for discovering new anti-tumor agents ...
Afshin Zare, Alireza Afshar, Nadiar M Mussin, Asset A Kaliyev, Raisa A. Aringazina, Nader Tanideh, Mahdi Mahdipour, Farhad Rahmanifar, Zhanna Zhussupova, Beibyt Tlektesuly Baizakov, Amin Tamadon   +10 more
doaj   +1 more source

The role of cell replacement in benthic–pelagic coupling by suspension feeders [PDF]

Royal Society Open Science, 2016
Benthic–pelagic coupling through suspension feeders and their detrital pathways is integral to carbon transport in oceans. In food-poor ecosystems however, a novel mechanism of carbon recycling has been proposed that involves direct uptake of dissolved ...
Amanda S. Kahn, Sally P. Leys
doaj   +1 more source

Stelletta ruetzleri sp. nov., a new ancorinid from the Southwestern Atlantic (Porifera, Astrophorida)

Scientia Marina, 2002
Stelletta ruetzleri sp. nov., a new ancorinid sponge from the Southwestern Atlantic (Porifera, Astrophorida), collected at 128 and 200 m depth off Rio Grande do Sul State coast, Brazil (31°20´-32°24´S/49°52´-50°15´W), is described and illustrated with ...
Beatriz Mothes, Carla Maria M. Silva
doaj   +1 more source