Results 21 to 30 of about 882 (131)

Respiration kinetics and allometric scaling in the demosponge Halichondria panicea

BMC Ecology and Evolution, 2023
Background The aquiferous system in sponges represents one of the simplest circulatory systems used by animals for the internal uptake and distribution of oxygen and metabolic substrates.
Lars Kumala, Malte Thomsen, Donald E. Canfield   +2 more
doaj   +1 more source

Agelasine Diterpenoids and Cbl-b Inhibitory Ageliferins from the Coralline Demosponge Astrosclera willeyana

Marine Drugs, 2021
An extract of the coralline demosponge Astrosclera willeyana inhibited the ubiquitin ligase activity of the immunomodulatory protein Cbl-b. The bioassay-guided separation of the extract provided ten active compounds, including three new N-methyladenine ...
Wei Jiang, Dongdong Wang, Brice A. P. Wilson, Unwoo Kang, Heidi R. Bokesch, Emily A. Smith, Antony Wamiru, Ekaterina I. Goncharova, Donna Voeller, Stanley Lipkowitz, Barry R. O’Keefe, Kirk R. Gustafson   +11 more
doaj   +1 more source

A horizontal gene transfer supported the evolution of an early metazoan biomineralization strategy

BMC Evolutionary Biology, 2011
Background The synchronous and widespread adoption of the ability to biomineralize was a defining event for metazoan evolution during the late Precambrian/early Cambrian 545 million years ago.
Wörheide Gert, Reitner Joachim, Macis Luciana, Jackson Daniel J   +3 more
doaj   +1 more source

Filtration Rates and Scaling in Demosponges

Journal of Marine Science and Engineering, 2022
Demosponges are modular filter-feeding organisms that are made up of aquiferous units or modules with one osculum per module. Such modules may grow to reach a maximal size.
Hans Ulrik Riisgård, Poul S. Larsen
doaj   +1 more source

New Source of 3D Chitin Scaffolds: The Red Sea Demosponge Pseudoceratina arabica (Pseudoceratinidae, Verongiida)

Marine Drugs, 2019
The bioactive bromotyrosine-derived alkaloids and unique morphologically-defined fibrous skeleton of chitin origin have been found recently in marine demosponges of the order Verongiida.
Lamiaa A. Shaala, Hani Z. Asfour, Diaa T. A. Youssef, Sonia Żółtowska-Aksamitowska, Marcin Wysokowski, Mikhail Tsurkan, Roberta Galli, Heike Meissner, Iaroslav Petrenko, Konstantin Tabachnick, Viatcheslav N. Ivanenko, Nicole Bechmann, Lyubov V. Muzychka, Oleg B. Smolii, Rajko Martinović, Yvonne Joseph, Teofil Jesionowski, Hermann Ehrlich   +17 more
doaj   +1 more source

Discovery of missing link between demosponges and hexactinellids confirms palaeontological model of sponge evolution

Scientific Reports, 2017
The two major extant groups of siliceous sponges, Demospongiae and Hexactinellida, are generally regarded as sister groups forming the clade Silicea, although the nature of their last common ancestor is uncertain.
Joseph P. Botting, Yuandong Zhang, Lucy A. Muir   +2 more
doaj   +1 more source

Surface Microornamentation of Demosponge Sterraster Spicules, Phylogenetic and Paleontological Implications

Frontiers in Marine Science, 2020
Siliceous spicules in demosponges exist in a variety of shapes, some of which look like minute spheres of glass. They are called “sterrasters” when they belong to the Geodiidae family (Tetractinellida order) and “selenasters” when they belong to the ...
Paco Cárdenas
doaj   +1 more source

Early evolution of the LIM homeobox gene family

BMC Biology, 2010
Background LIM homeobox (Lhx) transcription factors are unique to the animal lineage and have patterning roles during embryonic development in flies, nematodes and vertebrates, with a conserved role in specifying neuronal identity.
Degnan Bernard M, Chapman Jarrod, Mohanty Kareshma, Lu Daniel R, Larroux Claire, Srivastava Mansi, Rokhsar Daniel S   +6 more
doaj   +1 more source

Potential for host-symbiont communication via neurotransmitters and neuromodulators in an aneural animal, the marine sponge Amphimedon queenslandica

Frontiers in Neural Circuits, 2023
Interkingdom signalling within a holobiont allows host and symbionts to communicate and to regulate each other’s physiological and developmental states.
Xueyan Xiang, Arturo A. Vilar Gomez, Simone P. Blomberg, Huifang Yuan, Bernard M. Degnan, Sandie M. Degnan   +5 more
doaj   +1 more source

Creation of a 3D Goethite–Spongin Composite Using an Extreme Biomimetics Approach

Biomimetics, 2023
The structural biopolymer spongin in the form of a 3D scaffold resembles in shape and size numerous species of industrially useful marine keratosan demosponges.
Anita Kubiak, Alona Voronkina, Martyna Pajewska-Szmyt, Martyna Kotula, Bartosz Leśniewski, Alexander Ereskovsky, Korbinian Heimler, Anika Rogoll, Carla Vogt, Parvaneh Rahimi, Sedigheh Falahi, Roberta Galli, Enrico Langer, Maik Förste, Alexandros Charitos, Yvonne Joseph, Hermann Ehrlich, Teofil Jesionowski   +17 more
doaj   +1 more source