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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

Larva of a lamp shell

Larva of a lamp shell, also known as brachiopod.
Terebratalia transversa (Sowerby, 1846)
Oil on canvas
167.95 µm × 167.95 µm
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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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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

A ribbon worm

Ribbon worm
Adult specimen of Lineus ruber (Nemertea).
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biology imaging notes

Surface of the pilidium larva

Pilidium larva of a nemertean
Cilia covering the pilidium larva of a nemertean, a marine invertebrate. Honorable mention at the Olympus BioScapes 2014.
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biology notes

Nemertean laying eggs

Lineus sp
Nemertean Lineus ruber laying eggs
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biology imaging notes

Face to face with the pluteus larva

pluteus
Frontal view of an echino pluteus larva. Image is composed of 122 photos in different focal planes merged into one.

Source: https://commons.wikimedia.org/wiki/File:Frontal_view_of_a_pluteus_larva.tif

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biology imaging notes

Skeleton of the pluteus larva

Calcareous skeleton of a pluteus larva
Skeleton of the pluteus larva of a sea biscuit. Honorable mention in the Olympus BioScapes 2008.