Results 21 to 30 of about 2,935 (153)

Palaeoecological Implications of Lower-Middle Triassic Stromatolites and Microbe-Metazoan Build-Ups in the Germanic Basin: Insights into the Aftermath of the Permian–Triassic Crisis

Geosciences, 2022
Following the end-Permian crisis, microbialites were ubiquitous worldwide. For instance, Triassic deposits in the Germanic Basin provide a rich record of stromatolites as well as of microbe-metazoan build-ups with nonspicular demosponges.
Yu Pei, Hans Hagdorn, Thomas Voigt, Jan-Peter Duda, Joachim Reitner   +4 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

Indigenous demosponge spicules in a Late Devonian stromatoporoid basal skeleton from the Frasnian of Belgium [PDF]

, 2014
This paper records the first example of a demosponge spicule framework in a single specimen of a Devonian stromatoporoid from the Frasnian of southern Belgium.
Alvarez, Boulvain, Boulvain, Böhm, Chatterton, Da Silva, Da Silva, Debrenne, Erpenbeck, Erpenbeck, Erpenbeck, Gazave, Goldfuss, Gray, Haase-Schramm, Hartman, Hartman, Hooper, Hudson, Jackson, Jackson, Jochum, Kazmierczak, Kazmierczak, Kazmierczak, Kazmierczak, Kershaw, Lister, Mistiaen, Morrow, Reitner, Reitner, Reitner, Reitner, Reitner, Silva, Stearn, Stearn, Stearn, Stock, Uriz, Vacelet, Vasconcelos, Vortisch, Wood, Wood, Wood, Wood, Wood, Wörheide, Wörheide, Özdikmen   +51 more
core   +1 more source

Cytotoxic Compounds of Two Demosponges (Aplysina aerophoba and Spongia sp.) from the Aegean Sea

Biomolecules, 2021
The class of demosponges is the biggest and most diverse of all described sponge species and it is reported to produce a plethora of chemically different metabolites with interesting biological activities.
Maria Orfanoudaki, Anja Hartmann, Mostafa Alilou, Naida Mehic, Marcel Kwiatkowski, Karin Jöhrer, Hieu Nguyen Ngoc, Andreas Hensel, Richard Greil, Markus Ganzera   +9 more
doaj   +1 more source

Calcisponges have a ParaHox gene and dynamic expression of dispersed NK homeobox genes [PDF]

, 2014
This study was funded by the Sars Centre core budget to M. Adamska. Sequencing was performed at the Norwegian High Throughput Sequencing Centre funded by the Norwegian Research Council. O.M.R. and D.E.K.F.
A Saudemont, B Fahey, B Li, C Larroux, C Larroux, D Chourrout, D Darriba, DEK Ferrier, GN Luke, H-C Seo, J Garcia-Fernàndez, JF Ryan, JHL Hui, JHL Hui, KJ Peterson, M Boetzer, M Srivastava, MG Grabherr, N Takatori, O Mendivil Ramos, R Luo, S Amano, S Anders, S Fortunato, S Leininger, SA Fortunato, TM Keane, Y-F Zhong   +27 more
core   +2 more sources

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

RNA interference in marine and freshwater sponges [PDF]

, 2011
Background: The marine sponge Tethya wilhelma and the freshwater sponge Ephydatia muelleri are emerging model organisms to study evolution, gene regulation, development, and physiology in non-bilaterian animal systems. Thus far, functional methods (i.e.,
Cieniewicz, Brandon, Danka, Elizabeth S., Haen, Karri M., Hammel, Jörg U., Hill, April L., Hill, Malcolm S., Knight, Scott W., Lavrov, Dennis V., Nickel, Michael, Posfai, Dora, Rivera, Ajna S., Winters, Ian P., Wörheide, Gert   +12 more
core   +1 more source

Benthic foraminifers and siliceous sponge spicules assemblages in the Quaternary rhodolith rich sediments from Pontine Archipelago shelf [PDF]

, 2016
The bottom samples (Quaternary in age) of two cores (CS1 and Caro1) collected at 60 and 122 m water depth in the marine area near Ponza Island (Pontine Archipelago, Tyrrhenian Sea) are investigated.
Chiocci, Francesco Latino, DI BELLA, Letizia, Frezza, Virgilio, Ingrassia, Michela, Martorelli, Eleonora, Matteucci, Ruggero   +5 more
core   +1 more source

New genus and species of lithistid demosponges from submarine caves in Nuku Hiva (Marquesas Islands) and Tahiti Iti (Society Islands), French Polynesia

The European Zoological Journal, 2021
Lithistid demosponges are well known from limestone caves of karstic origin in the Mediterranean Sea. However, they have never been reported from submarine caves of volcanic origin in the South Pacific. Here, we describe and provide DNA barcodes for four
A. Schuster, A. Pisera, M. Ekins, C. Debitus   +3 more
doaj   +1 more source

The Skeletal Amino Acid Composition of the Marine Demosponge Aplysina cavernicola

Marine Drugs, 2014
It has been discovered during the past few years that demosponges of the order Verongida such as Aplysina cavernicola exhibit chitin-based skeletons. Verongida sponges are well known to produce bioactive brominated tyrosine derivatives. We could recently
Susanne Ueberlein, Susanne Machill, Hendrik Niemann, Peter Proksch, Eike Brunner   +4 more
doaj   +1 more source