Results 51 to 60 of about 2,233 (161)

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

Journal of Experimental Zoology Part B: Molecular and Developmental Evolution, Volume 344, Issue 8, Page 505-516, December 2025.
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.
Veronica L. Price, Anudi Nanayakkara, Andrea Pasini, Elsa Bazellières, Amelie Vernale, Caroline Rocher, Carole Borchiellini, Andre Le Bivic, Emmanuelle Renard, Sally P. Leys   +9 more
wiley   +1 more source

The homeodomain complement of the ctenophore Mnemiopsis leidyi suggests that Ctenophora and Porifera diverged prior to the ParaHoxozoa

EvoDevo, 2010
Background The much-debated phylogenetic relationships of the five early branching metazoan lineages (Bilateria, Cnidaria, Ctenophora, Placozoa and Porifera) are of fundamental importance in piecing together events that occurred early in animal evolution.
Ryan Joseph F, Pang Kevin, Mullikin James C, Martindale Mark Q, Baxevanis Andreas D   +4 more
doaj   +1 more source

The evolution of reproduction in Ediacaran–Cambrian metazoans

Biological Reviews, Volume 100, Issue 5, Page 2084-2098, October 2025.
ABSTRACT The evolution of reproductive style is a fundamental aspect of metazoan life history but has not been explored holistically through the Ediacaran–Cambrian rise of metazoans. Recent molecular clock analyses based on only unequivocal metazoan fossil calibrations suggest that Porifera were present by at least 590 million years ago (Ma), all major
Rachel A. Wood, Mary L. Droser
wiley   +1 more source

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

Multiple Mammalian Cytokines and Erythropoietin‐Mimetic Peptides Protect Insect Neurons via Phylogenetically Conserved Cytokine Receptor‐Like Factor 3 (CRLF3)

Journal of Neurochemistry, Volume 169, Issue 9, September 2025.
Mammals express five different structurally related cytokine type I receptors: erythropoietin‐receptor, thrombopoietin‐receptor, prolactin‐receptor, growth hormone‐receptor and cytokine receptor‐like factor 3 (CRLF3). Of these, only CRLF3 exists in insects and other eumetazoan invertebrates.
Nina Hahn, Debbra Y. Knorr, Björn Twellsieck, Ruoyu Huang, Abigail Trebilcock, Nicola Schwedhelm‐Domeyer, Stephanie Pauls, Lars v. Werven, Olaf Jahn, Hannelore Ehrenreich, Ralf Heinrich   +10 more
wiley   +1 more source

A Reassessment of the Coprostane Biomarker in the Ediacaran With Implications for Dickinsonia

Geobiology, Volume 23, Issue 4, July/August 2025.
ABSTRACT The discovery of cholestane in animal fossils from the Ediacaran (571–541 million years ago) has generated much excitement, but it is not the only interesting biomarker recovered. Coprostane, a geologically stable form of coprostanol, has also been found in Ediacaran rocks.
Christopher Mulligan, David A. Gold
wiley   +1 more source

A low diversity of ANTP class homeobox genes in Placozoa

Evolution & Development, 2006
SUMMARYHomeobox genes of the ANTP and PRD classes play important roles in body patterning of metazoans, and a large diversity of these genes have been described in bilaterian animals and cnidarians.Trichoplax adhaerens(Phylum Placozoa) is a small multicellular marine animal with one of the simplest body organizations of all metazoans, showing no ...
Monteiro, A, Schierwater, B, Dellaporta, S, Holland, P   +3 more
openaire   +2 more sources

A Network Approach to White Band Disease Challenged Staghorn Coral Acropora cervicornis microRNAs and Their Targets

Ecology and Evolution, Volume 15, Issue 4, April 2025.
Our study looks at the association between microRNA expression and disease resistance in Caribbean staghorn corals infected with White Band Disease. We find three microRNAs differentially expressed due to disease resistance with putative targets involved in innate immunity.
Brecia A. Despard, Jason D. Selwyn, Allison N. Shupp, Steven V. Vollmer   +3 more
wiley   +1 more source

Dendrogramma, new genus, with two new non-bilaterian species from the marine bathyal of southeastern Australia (Animalia, Metazoa incertae sedis)--with similarities to some medusoids from the Precambrian Ediacara.

PLoS ONE, 2014
A new genus, Dendrogramma, with two new species of multicellular, non-bilaterian, mesogleal animals with some bilateral aspects, D. enigmatica and D. discoides, are described from the south-east Australian bathyal (400 and 1000 metres depth).
Jean Just, Reinhardt Møbjerg Kristensen, Jørgen Olesen, Jørgen Olesen   +3 more
doaj   +1 more source

Comparative genomics and the nature of placozoan species. [PDF]

PLoS Biology, 2018
Placozoans are a phylum of nonbilaterian marine animals currently represented by a single described species, Trichoplax adhaerens, Schulze 1883. Placozoans arguably show the simplest animal morphology, which is identical among isolates collected ...
Michael Eitel, Warren R Francis, Frédérique Varoqueaux, Jean Daraspe, Hans-Jürgen Osigus, Stefan Krebs, Sergio Vargas, Helmut Blum, Gray A Williams, Bernd Schierwater, Gert Wörheide   +10 more
doaj   +1 more source