Results 31 to 40 of about 882 (131)
Sedimentology, EarlyView.ABSTRACT Classical models of formation of sedimentary siliceous rocks (flint, chert, opoka) commonly assume that the Cretaceous marine silicon (Si) cycle was primarily biologically controlled, broadly analogous to the modern ocean. In this framework, siliceous sponges are regarded as the principal source of dissolved silica (dSi) to sediment porewaters,
Agata Jurkowska +4 more
wiley +1 more source
Geologica Acta, 2003 The Middle Cambrian Murero Formation in the Iberian Chain (NE Spain) has yielded a small collection of softbodied fossils (palaeoscolecid worms, onychophorans, algae), a host of fossils from organisms with mineralized skeletons such as trilobites and ...
Diego García-Bellido Capdevila
doaj +1 more source
Sedimentology, Volume 73, Issue 6, Page 2246-2280, October 2026.ABSTRACT Filamentous, anastomosing spar‐filled networks in Phanerozoic carbonates have been interpreted as the mineralised remains of keratose (non‐spiculate) sponges, yet their recognition remains contested because fabrics of broadly similar appearance may arise from microbial, diagenetic or physical processes. This study combines direct fossil–modern
Jeong‐Hyun Lee +2 more
wiley +1 more source
Diverse RNA interference strategies in early-branching metazoans
BMC Evolutionary Biology, 2018 Background Micro RNAs (miRNAs) and piwi interacting RNAs (piRNAs), along with the more ancient eukaryotic endogenous small interfering RNAs (endo-siRNAs) constitute the principal components of the RNA interference (RNAi) repertoire of most animals.
Andrew D. Calcino +3 more
doaj +1 more source
Biopolymers, Volume 117, Issue 5, September 2026.The two phosphorylation sites within the Gab1 fragment 142‐203 exhibit distinct structural characteristics. Tyr162 is in a disordered region, Y183 in a helical segment. ABSTRACT The biological function of intrinsically disordered proteins is frequently coupled to short linear motifs, which serve as protein binding sites.
Anne Dietrich +5 more
wiley +1 more source
Rethinking Plasticity in Sponges
Journal of Experimental Zoology Part B: Molecular and Developmental Evolution, Volume 346, Issue 6, Page 431-446, September 2026.This systematic review critiques the conceptual confusion caused by the indiscriminate use of “plasticity” in Porifera literature, revealing that researchers often overlook genetic variability and fail to distinguish between real‐time environmental responses and natural selection.
Laura Oliveira, Emilio Lanna
wiley +1 more source
PLoS ONE, 2015 The advent of deep-sea exploration using video cameras has uncovered extensive sponge aggregations in virtually all oceans. Yet, a distinct type is herein reported from the Mediterranean: a monospecific reef-like formation built by the lithistid ...
Manuel Maldonado +5 more
doaj +1 more source
New Zealand Journal of Zoology, Volume 53, Issue 3, September 2026.Rhodolith beds are structurally complex biogenic habitats recognized as important reservoirs of marine biodiversity, yet their associated sponge fauna remains poorly documented in the Southwestern Atlantic. Here, two new species of the genus Clathria Schmidt, 1862 (Microcionidae) are described from mesophotic rhodolith beds off the coast of Pernambuco,
Thales Barros, Ulisses Pinheiro
wiley +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 +4 more
doaj +1 more source
Reproduction and Development in Calcareous Sponges: A Panorama of the Last Two Centuries
Molecular Reproduction and Development, Volume 93, Issue 7, July 2026.ABSTRACT Nearly 200 years ago, scientists began examining reproductive cells in calcareous sponges (Calcarea, Porifera). Since then, 238 studies have been published, encompassing descriptions of gametes and embryos (including ultrastructural studies), life history, asexual reproduction, regeneration, and molecular aspects of development.
Bruno Cajado, Emilio Lanna
wiley +1 more source