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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 imaging notes

Fruit fly embryo under lightsheet microscopy

A short video that I made about the embryonic development of the likeable Drosophila, also known as fruit fly or vinegar fly, won an honorable mention in the Small World in Motion.

A single embryo imaged from four different angles.

The details on the techniques I used and the video on its full resolution are available for download and re-use on the Wikimedia Commons.

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imaging biology notes

The surface of a brachiopod embryo

Brachiopod embryo showing its surface and blastopore.
Embryo of the brachiopod Novocrania anomala at the gastrula stage showing its outer surface and the blastopore at the bottom. Cell membranes were stained (F-actin) and the original image stack was converted to a 3D animation using Fiji/ImageJ.
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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 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 notes

Cleavage stages of the annelid Chaetopterus

Beginning this #WormWednesday with the beginnings of a worm. The cleavage stages of the annelid Chaetopterus.

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biology imaging notes

Embryonic cell division

At some point in our lives, we have all been through that (=embryonic cleavage).

Movie of a developing echinoderm embryo accelerated 3x.
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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 notes

Ribbon worm development

Our paper on the unique development of a ribbon worm and the evolution of larval forms: https://evodevojournal.biomedcentral.com/articles/10.1186/s13227-015-0023-5

Adult specimen of Ribbon worm Lineus ruber (Nemertea).

See more about Lineus ruber.