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Haeckel Lychnaspis miranda skeleton (protozoa) Beverage Coasters
Haeckel Lychnaspis miranda skeleton (protozoa) Beverage Coasters
Kunstformen der Natur, 1904

Lychnaspis miranda is in the Sublegion Acanthophracta of the Subclass Acantharea. Acantharea are a small group of radiolarian protozoa, distinguished mainly by their skeletons. These are composed of strontium sulfate crystals, which do not fossilize, and take the form of either ten diametric or twenty radial spines. The central capsule is made up of microfibrils arranged into twenty plates, each with a hole through which one spine projects, and there is also a microfibrillar cortex linked to the spines by myonemes. These assist in flotation, together with the vacuoles in the ectoplasm, which often contain zooxanthellae.

The arrangement of the spines is very precise, and is described by what is called the Muellerian law. This is easiest to describe in terms of lines of latitude and longitude - the spines lie on the intersections between five of the former, symmetric about an equator, and eight of the latter, spaced uniformly. Each line of longitude carries either two tropical spines or one equatorial and two polar spines, in alternation. The way that the spines are joined together at the center of the cell varies and is one of the primary characteristics by which acanthareans are classified.

The axopods are fixed in number. Adults are usually multinucleated. Reproduction is thought to take place by formation of swarmer cells (formerly referred to as "spores"), which may be flagellate. All life cycle stages have not been observed, and study of these organisms has been hampered mainly by an inability to maintain these organisms in culture through successive generations.

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Haeckel Lychnaspis miranda skeleton (protozoa)
Kunstformen der Natur, 1904

Lychnaspis miranda is in the Sublegion Acanthophracta of the Subclass Acantharea. Acantharea are a small group of radiolarian protozoa, distinguished mainly by their skeletons. These are composed of strontium sulfate crystals, which do not fossilize, and take the form of either ten diametric or twenty radial spines. The central capsule is made up of microfibrils arranged into twenty plates, each with a hole through which one spine projects, and there is also a microfibrillar cortex linked to the spines by myonemes. These assist in flotation, together with the vacuoles in the ectoplasm, which often contain zooxanthellae.

The arrangement of the spines is very precise, and is described by what is called the Muellerian law. This is easiest to describe in terms of lines of latitude and longitude - the spines lie on the intersections between five of the former, symmetric about an equator, and eight of the latter, spaced uniformly. Each line of longitude carries either two tropical spines or one equatorial and two polar spines, in alternation. The way that the spines are joined together at the center of the cell varies and is one of the primary characteristics by which acanthareans are classified.

The axopods are fixed in number. Adults are usually multinucleated. Reproduction is thought to take place by formation of swarmer cells (formerly referred to as "spores"), which may be flagellate. All life cycle stages have not been observed, and study of these organisms has been hampered mainly by an inability to maintain these organisms in culture through successive generations.

Vintage retro cute colorful artistic nature pattern animal elegant decor fine art.
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Haeckel Lychnaspis miranda skeleton (protozoa) Beverage Coasters

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Product ID: 163654209707132319
Made on: 12/24/2011 7:17 AM
Reference: Guide Files