Results 71 to 80 of about 1,571 (170)
Acoustic evidence for topographic blocking on a steep submarine canyon wall
Limnology and Oceanography, Volume 71, Issue 6, June 2026.Abstract Diel vertical migration (DVM) is the largest mass‐movement of animals on Earth, with profound ecological and biogeochemical consequences. DVM has mostly been studied in the open ocean; however, at steep slopes, pelagic animals including vertical migrators must contend with the seafloor, emphasizing the importance of understanding DVM in these ...
Astrid B. Leitner +5 more
wiley +1 more source
Molecular Reproduction and Development, Volume 93, Issue 6, June 2026.ABSTRACT Sex determination in Porifera remains one of the least understood aspects of early metazoan biology despite the group's key phylogenetic position. Sponges display exceptional diversity in sexual systems—ranging from stable gonochorism to sequential hermaphroditism and sex reversal—yet lack morphological dimorphism and any discrete gonadal ...
Jose M. Lorente‐Sorolla, Ana Riesgo
wiley +1 more source
People and Nature, Volume 8, Issue 6, Page 1957-1973, June 2026.Abstract Biological invasions are a major driver of biodiversity loss, yet inconspicuous or “cryptic” species often escape detection and public awareness, limiting management responses. We investigated the freshwater jellyfish Craspedacusta sowerbii, likely native to China and now present on six continents, through a 22‐month multilingual online survey
Guillaume Marchessaux +17 more
wiley +1 more source
Selective Advantages of Synapses in Evolution
Frontiers in Cell and Developmental Biology, 2021 Leonid L. Moroz +2 more
doaj +1 more source
Regulation and Regeneration in the Ctenophore Mnemiopsis leidyi
Developmental Biology, 2000 Lobate ctenophores (tentaculates) generally exhibit a remarkable ability to regenerate missing structures as adults. On the other hand, their embryos exhibit a highly mosaic behavior when cut into halves or when specific cells are ablated. These deficient embryos do not exhibit embryonic regulation, and generate incomplete adult body plans.
Henry, Jonathan Q., Martindale, Mark Q.
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Convergent evolution of neural systems in ctenophores [PDF]
Journal of Experimental Biology, 2015 Neurons are defined as polarized secretory cells specializing in directional propagation of electrical signals leading to the release of extracellular messengers – features that enable them to transmit information, primarily chemical in nature, beyond their immediate neighbors without affecting all intervening cells en route.
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Ctenophores and the evolutionary origin(s) of neurons
Trends in Neurosciences, 2022 Ctenophores (commonly known as comb jellies) are among the earliest branching extant lineages of the animal kingdom. Here, I present a brief overview of the ctenophore nervous system, discussing its cellular architecture and molecular composition, as well as insights it offers into the early evolution of neurons and chemical neurotransmission.
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A blastoporal organizer in a ctenophore
NatureAbstract In an iconic experiment in 1924, Hilde Mangold and Hans Spemann established that the dorsal blastopore lip of amphibian embryos functions as an organizer and induces a secondary body axis when transplanted into a host embryo 1 .
Stanislav Kremnyov +3 more
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Conserved expression of vertebrate microvillar gene homologs in choanocytes of freshwater sponges
EvoDevo, 2016 Background The microvillus is a versatile organelle that serves important functions in disparate animal cell types. However, from a molecular perspective, the microvillus has been well studied in only a few, predominantly vertebrate, contexts.
Jesús F. Peña +5 more
doaj +1 more source
Making Neurobots and Chimerical Ctenophores
Abstract Making living machines using biological materials (cells, tissues, and organs) is one of the challenges in developmental biology and modern biomedicine. Constraints in regeneration potential and immune self-defense mechanisms limit the progress in the field.
Leonid L Moroz, Tigran P. Norekian
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