Results 11 to 20 of about 1,747 (203)

Why Homoscleromorph Sponges Have Ciliated Epithelia: Evidence for an Ancestral Role in Mucociliary Driven Particle Flux. [PDF]

J Exp Zool B Mol Dev Evol
Epithelia are typically ciliated, except in sponges. Of all Porifera only Homoscleromorphs have motile cilia on their epithelia. Our data highlight the presence of cilia and mucociliary particle transport as a common feature of metazoa and a secondary loss in other sponge lineages.
Price VL, Nanayakkara A, Pasini A, Bazellières E, Vernale A, Rocher C, Borchiellini C, Le Bivic A, Renard E, Leys SP.   +9 more
europepmc   +2 more sources

Transposon-derived transcription factors across metazoans

Frontiers in Cell and Developmental Biology, 2023
Transposable elements (TE) could serve as sources of new transcription factors (TFs) in plants and some other model species, but such evidence is lacking for most animal lineages. Here, we discovered multiple independent co-options of TEs to generate 788 
Krishanu Mukherjee, Leonid L. Moroz, Leonid L. Moroz   +2 more
doaj   +1 more source

Long Term Copepod Culture Houses a Rich Microbial Eukaryotic Community Including New and Known Symbionts. [PDF]

J Eukaryot Microbiol
ABSTRACT Copepods, dominant marine zooplankton, are hosts to microbial eukaryotic symbionts, but the copepod eukaryome remains largely unexplored. We used 18S rRNA gene primers with reduced metazoan amplification to identify microbial eukaryotes in a culture of Calanus finmarchicus (Copepoda).
Eliassen LK, Altin D, Andersen T, Riemann L, Dunthorn M, Titelman J.   +5 more
europepmc   +2 more sources

Early animal evolution: a morphologist's view [PDF]

Royal Society Open Science, 2019
Two hypotheses for the early radiation of the metazoans are vividly discussed in recent phylogenomic studies, the ‘Porifera-first’ hypothesis, which places the poriferans as the sister group of all other metazoans, and the ‘Ctenophora-first’ hypothesis ...
Claus Nielsen
doaj   +1 more source

Genomic Insights Into Species Delimitation and the Evolutionary History of Mimetic <i>Aletis</i> Moths (Lepidoptera, Geometridae) in the Afrotropics. [PDF]

Ecol Evol
We investigated the evolutionary history and species boundaries of diurnal Aletis moths in the Afrotropics using mitochondrial DNA and genome‐wide SNP data. Our results support five distinct species, with divergence dating back to 0.9 million years ago, influenced by climate‐driven isolation and habitat variation.
Lee KM, Staude H, Holm S, Laiho E, Murillo-Ramos L, Opedal ØH, Rajaei H, Terblanche RF, Botha M, Sihvonen P.   +9 more
europepmc   +2 more sources

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

Ctenophora flaveolata (Fabricius, 1794) (Diptera: Tipulidae) – a cranefly species new for Russia and the Caucasus [PDF]

Кавказский энтомологический бюллетень, 2019
So far, three  species of craneflies from the genus Ctenophora Meigen, 1803 are known in the Caucasus for certain: C.  (Ctenophora) guttata  Meigen, 1818, C.  (Cnemoncosis) ornata Meigen, 1818 and C. (Cnemoncosis) magnifica Loew, 1869.
V.I. Lantsov, A.R. Bibin
doaj   +1 more source

Environmental drivers and ecological implications of a ctenophore swarm: a case study from the Bay of Bengal, northern Indian Ocean

Journal of Water and Climate Change, 2023
Ctenophores are quick responders to coastal environmental changes and play a crucial role in marine food web dynamics. We report the environmental drivers of a ctenophore swarm (Pleurobrachia spp.) and associated ecological changes in estuarine and ...
Alfisa Siddique, Aishee Bhowal, Jasmine Purushothaman, Rakhesh Madhusoodhanan, Dhriti Banerjee   +4 more
doaj   +1 more source

Very few sites can reshape the inferred phylogenetic tree [PDF]

PeerJ, 2020
The history of animal evolution, and the relative placement of extant animal phyla in this history is, in principle, testable from phylogenies derived from molecular sequence data. Though datasets have increased in size and quality in the past years, the
Warren R. Francis, Donald E. Canfield
doaj   +2 more sources

The genetic factors of bilaterian evolution

eLife, 2020
The Cambrian explosion was a unique animal radiation ~540 million years ago that produced the full range of body plans across bilaterians. The genetic mechanisms underlying these events are unknown, leaving a fundamental question in evolutionary biology ...
Peter Heger, Wen Zheng, Anna Rottmann, Kristen A Panfilio, Thomas Wiehe   +4 more
doaj   +1 more source