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biology imaging notes

The blastopore of bryozoan embryos

This is a bryozoan embryo exhibiting its blastopore. These animals are discreet but ubiquitous in oceans and lakes all over the world.

Bryozoan embryo during gastrulation revealing its blastopore.
Embryo of the bryozoan Membranipora membranacea under confocal microscopy.

What we see is the DNA inside the nucleus of the cells of the embryo. The color gradient indicates if the nuclei are closer (yellow) or further away (purple) from the microscope camera.

The embryonic cells are arranged in a circle and form a central opening that we call the blastopore. This opening, in bryozoans, will become the mouth of the animal after the embryo develops.

You can follow the process on video or learn more details in the paper.

What about our mouth, where does it come from?

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biology notes

Understanding the evolution of cleavage patterns in early embryonic development

Video summary about our work on bryozoan development and the evolution of cleavage patterns published in BMC Biology!

The video was produced by Research Square. Also available on Vimeo.

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biology notes

Bryozoan cell lineage

What happens when cleavage patterns evolve? Some insights from bryozoan embryonic development: https://bmcbiol.biomedcentral.com/articles/10.1186/s12915-017-0371-9

Summary bryozoan cell lineage
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biology imaging notes

Bryozoan embryos viewed from the animal and vegetal poles

The first 24 hours in 1.5 minutes of bryozoan embryos.

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biology imaging notes

Bryozoan embryos viewed from the animal pole

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biology imaging notes

Bryozoan life cycle

The BEST footage of bryozoan life cycle in the internet. Meet the coronate larva of Bugula neritina. Wow!

Made by Alvaro E. Migotto and Leandro M. Vieira.
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biology imaging notes

Cyphonautes day

The name cyphonautes was created by Ehrenberg (1834), who first saw the tiny creature on Nov. 25, 1832 (Hyman 1959).

Cyphonautes larva of the bryozoan Membranipora membranacea.
Cyphonautes larva of the bryozoan Membranipora membranacea after being fed red micro-algae.
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biology notes

Classic drawing of a cyphonautes larva

Elegant schematic drawing of a bryozoan cyphonautes larva from 1907 https://www.biodiversitylibrary.org/page/10304879#page/324/mode/1up

Classic drawing of a cyphonautes larva.
Kupelwieser, Hans (1907) Untersuchungen über den feineren Bau und die Metamorphose des Cyphonautes. Zoologica.

Thanks to @BioDivLibrary. Made me smile 🙂

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biology notes

Living cyphonautes larva

After the illustration, this is a living cyphonautes larva collected from the plankton.

Cyphonautes larva collected from the plankton.
Alvaro E. Migotto. Larva cifonauta. Banco de imagens Cifonauta. Disponível em: http://cifonauta.cebimar.usp.br/media/5662/ Acesso em: 2020-10-17.
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biology notes

New bryozoan species from Brazil

Twelve new bryozoan species from Brazil (Vieira et al. 2014) with videos hosted on the Cifonauta database. Check out some of these images here.

New bryozoan species from Brazil.
A colony of ctenostomatous bryozoans.