Results 11 to 20 of about 1,386 (178)

ParaHox Genes Revisited: From Gut Patterning to Integrated Axial and Neural Organization in Rotifera. [PDF]

open access: yesJ Exp Zool B Mol Dev Evol
In rotifers, ParaHox genes show a dispersed genomic organization, with Xlox absent across gnathiferans. Exclusive neuronal expression of Gsx and Cdx reveals that ancestral ParaHox genes coordinated neural and epithelial development beyond gut patterning, suggesting an integrated role in early bilaterian body plan organization.
Fröbius AC, Mark Welch DB, Herlyn H.
europepmc   +2 more sources

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

open access: yesPeerJ, 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

Scyphomedusae and Ctenophora of the Eastern Adriatic: Historical Overview and New Data

open access: yesDiversity, 2021
One of the obstacles to detecting regional trends in jellyfish populations is the lack of a defined baseline. In the Adriatic Sea, the jellyfish fauna (Scyphozoa and Ctenophora) is poorly studied compared to other taxa. Therefore, our goal was to collect
Branka Pestorić   +7 more
doaj   +1 more source

The genetic factors of bilaterian evolution

open access: yeseLife, 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   +4 more
doaj   +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.

open access: yesPLoS 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   +3 more
doaj   +1 more source

A Screen for Gene Paralogies Delineating Evolutionary Branching Order of Early Metazoa

open access: yesG3: Genes, Genomes, Genetics, 2020
The evolutionary diversification of animals is one of Earth’s greatest marvels, yet its earliest steps are shrouded in mystery. Animals, the monophyletic clade known as Metazoa, evolved wildly divergent multicellular life strategies featuring ciliated ...
Albert Erives, Bernd Fritzsch
doaj   +1 more source

Environmental patterns and biomass distribution of gelatinous macrozooplankton. Three study cases in the South-western Atlantic Ocean

open access: yesScientia Marina, 2000
Periodic swarms or blooms of gelatinous macrozooplankton have a negative effect on many human activities such as tourism, fisheries, and industry, but for several reasons (sampling procedures, underestimation of their real abundance, etc.), they have ...
H. W. Mianzan, R. A. Guerrero
doaj   +1 more source

Initial discovery of microplastic pollution in Mnemiopsis leidyi (Ctenophora: Lobata)

open access: yesWater Biology and Security, 2023
The production of plastics has exponentially increased over time such that the observation of microplastics in the oceans has become a major concern given how frequently these particles and marine biota may interact.
Mariana Beatriz Paz Otegui   +3 more
doaj   +1 more source

The complete mitochondrial genome of the Ctenophore Beroe cucumis, a mitochondrial genome showing rapid evolutionary rates

open access: yesMitochondrial DNA. Part B. Resources, 2019
We described the complete mitochondrial genome of the Ctenophore Beroe cucumis, which is a circular molecule of 10,487 bp in length. The new mitochondrial genome comprised only 12 genes, making it one of the smallest animals’ mtDNA.
Minxiao Wang, Fangping Cheng
doaj   +1 more source

A sticky thicket of glue cells: A comparative morphometric analysis of colloblasts in 20 species of comb jelly (phylum Ctenophora)

open access: yesCiencias Marinas, 2020
Ctenophores in the class Tentaculata are distinct from Cnidarians in that they use sticky, not stinging, tentacles to capture and subdue their prey.
Nicholas D Leonardi   +2 more
doaj   +1 more source

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