Hypothallus

As Hypothallus is referred to in the real slime molds, the Myxogastria, a skin- like layer, on which rests the fruit body and represents the connection of the fruit body to the ground. Literally, the term means " under the thallus ."

The Hypothallus is made of Plasmodium at the beginning of fructification. Depending on the type he can until thick or delicate to be firmly membranous and nearly transparent colored to bright. He is either defined as an approach of individual fruiting bodies or designed as a continuous layer that connects the approaches of many fruiting bodies together. In rare cases, it is entirely absent.

Depending on the taxon he is directly involved in the further development of the fruit body: at the Stemonitida there is a so-called " epihypothallischen " development of the fructification. This is a hollow, tube-like stalk (and as a result of which a columella ) developed from the Hypothallus, this trinity forms a morphological unit. At the arm or the columella, the remaining Plasmodium rises and forms a separate, carrying the spores structure.

For all other Myxogastria other hand, finds a place " subhypothallische " development. Here, the Hypothallus forms a layer overlying the Plasmodium, the spaces of the individual fruiting bodies formed in the fruiting. Since the surrounding Plasmodium then flows into the fruiting bodies, the Hypothallus comes to lie directly on the substrate shrinks and thus forms the approach of the mature fruiting body. The Hypothallus here with peridium and the handle part of morphological unit which serves as a bearing shell of the membranous entire spore structure.

The Epihypothallie is an autapomorphy of Stemonitida and is opposite the Subhypothallie as a primitive characteristic.

Evidence

• Morphology
• Protistologie
• Cell Biology