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Agnotozoa

Agnotozoa

The images you see on this page have been generated by AI - they are not real images of Agnotozoa, but they are great nonetheless! :)
2023-07-18 Snargl 1 minute 41 seconds

What kind of animal is Agnotozoa?

Painting of a tree surrounded by sea creatures and bubbles in a circular frame with a light shining through the center
Blue and silver sculpture of a giant octopus with spikes and spikes on its head and body
Yellow fish with a yellow head and yellow legs on a sandy surface with small bubbles and small green leaves
Futuristic looking object with a green light in the center of it's centerpieces and a circular hole in the middle
Colorful object with a pearl in the middle of it's center surrounded by other objects and plants
Digital painting of a girl with green eyes and a strange hairdow with tentacles around her head

Agnotozoa is a term that was used to describe a group of simple animals that have tissues, but not organs.

It was first proposed in 1952 by Moore et al. as a branch of the subkingdom Metazoa.

It included only one group, Mesozoa, which are parasites of marine invertebrates.

Later, some authors added two more groups, Placozoa and Rhombozoa, to Agnotozoa.

Placozoa are flat, multicellular animals that have no symmetry, no nervous system, and no digestive tract.

Rhombozoa are also parasites of marine invertebrates, and have a simple body plan with two cell layers and a single opening.

However, Agnotozoa is not a valid taxonomic group, because it is not monophyletic.

This means that the animals in Agnotozoa do not share a common ancestor, and are more closely related to other animals than to each other.

Molecular and morphological studies have shown that Placozoa is either the sister group of all other animals, or of all other animals except sponges, or of the group Bilateria, which includes most animals with bilateral symmetry.

Mesozoa, which includes Orthonectida and Dicyemida, are actually simplified bilaterians that have retained some muscle cells and nerve cells.

Therefore, Agnotozoa is an artificial group that does not reflect the true evolutionary relationships of the animals it contains.

In summary, Agnotozoa is an outdated term for a group of simple animals that have tissues, but not organs.

It was originally composed of Mesozoa, and later expanded to include Placozoa and Rhombozoa.

However, these groups are not closely related to each other, and are better classified in other subkingdoms of animals.

Agnotozoa is therefore not a valid taxonomic group.

Example of the color palette for the image of Agnotozoa

Picture with primary colors of Onyx, Feldgrau, Gainsboro, Grullo and Bistre
Top 5 color shades of the illustration. Arranged in descending order of frequency of occurrence (first - more often, last - more rare).
See these colors in NCS, PANTONE, RAL palettes...
NCS (Natural Color System)
NCS S 6010-G10Y
RAL Classic
RAL 9005
RAL 7043
RAL 9002
RAL 1035
RAL 3007
RAL Design
RAL 170 20 20
RAL 000 35 00
RAL 120 90 05
RAL 080 20 10
RAL Effect
RAL 850-6
RAL 780-5
Author:

What is the animal Agnotozoa known for?

Yellow jellyfish floating in the ocean with bubbles on it's head and legs, with a blue background
Close up of a jellyfish in the water with a blue background
Close up of a small orange octopus on a rock with leaves in the background
Yellow and orange Agnotozoa with long legs on a rock surface with rocks in the background
Yellow and white octopus on top of a sandy beach next to rocks and water with a light shining on it

Example of the color palette for the image of Agnotozoa

Picture with primary colors of Cafe noir, Gray-Tea Green, Medium aquamarine, Ochre and Eggshell
Top 5 color shades of the illustration. Arranged in descending order of frequency of occurrence (first - more often, last - more rare).
See these colors in NCS, PANTONE, RAL palettes...
NCS (Natural Color System)
NCS S 2040-B90G
RAL Classic
RAL 8016
RAL 9007
RAL 6027
RAL 2010
RAL 9001
RAL Design
RAL 050 20 16
RAL 100 60 05
RAL 150 80 40
RAL 070 60 70
RAL 070 90 10
Author:

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