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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

Chubby ribbon worm

A chubby ribbon worm juvenile #Nemertean #WormWednesday

Chubby ribbon worm
Juvenile specimen of the nemertean Lineus ruber under wide field fluorescence microscopy. Magenta: Nuclei; Green: F-actin.

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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

The pelagosphera larva of Sipuncula

The pelagosphera larva of #Sipuncula. Photo by Alvaro Migotto via @cifonauta http://cifonauta.cebimar.usp.br/photo/10874/

Pelagosphera larva of Sipuncula
Categories
imaging biology notes

Eye imaginal disc of Drosophila

The eye imaginal disc of Drosophila (blue=elav, pink=repo, yellow=hrp) prepared with @Bugs_and_Slugs @ZVavrusova @zeiss_micro #embryo2017

Eye imaginal disc of Drosophila.
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imaging biology notes

Zebrafish laser eyes

Zebrafish embryo with laser eyes! A transgenic line for the gene Prox1 (orange) imaged with @zeiss_micro #embryo2017

Zebrafish laser eyes
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biology notes

Larval biscuit

My former – but not forgotten – larval crush is the Image of the Week on @BIOINTERACTIVE Larval Biscuit http://hhmi.org/biointeractive

Larval biscuit (Clypeaster subdepressus).

See A sea biscuit’s life for more.

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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.
Categories
biology notes

Lineus longissimus, the longest worm on the planet

Lineus longissimus, the longest worm in the planet.
Adult specimen of the nemertean Lineus longissimus. This photo is now available in the Wikimedia Commons.
Categories
biology imaging notes

A ribbon worm

Ribbon worm
Adult specimen of Lineus ruber (Nemertea).