Protosteliales
The Protostelia were long regarded as one of the subclasses of the slime molds. They were the least species and included only an order that Protosteliales with fifteen genera and approximately forty species.
Features
Representatives of Protostelia are in trophic stage, either amoebae, which move on the substrate crawling or - in more humid to wet environments - flagellated Amoeboflagellaten. As an amoeba, they have filopodia.
The fruiting bodies, called Sporokarpe are formed only from amoebae. The Sporokarpe are stalked, the stalks acellular, hollow and between about 5 and 100 microns long. They carry between one and eight spores.
System
The name of the subclass was introduced in 1970 by Lindsay Shepherd Olive, the 1967 order, also of Olive. In a study from 2007, 36 species were reported for the Protostelia, estimates based on sequenced environmental samples, however, assume that the group is significantly larger, with around 150 species than previously known.
The subclass included four families with the following genera in an order:
- Cavosteliaceae Cavostelium
- Ceratiomyxella
- Planoprotostelium
- Protosporangium
- Echinosteliopsis
- Clastostelium
- Endostelium
- Microglomus
- Nematostelium
- Protosteliopsis
- Protostelium
- Schizoplasmodiopsis
- Schizoplasmodium
- Tychosporium
However, later, molekukargenetischen studies show that the taxon is divided into many different groups. Some of them can be represented as a direct Untertaxa the Amoebozoa as follows:
- Protosteliida: Planoprotostelium, Protostelium.
- Cavosteliida: Cavostelium, Schizoplasmodiopsis, Tychosporium
- Protosporangiida Protosporangiidae: Clastostelium, Protosporangium.
- Ceratiomyxa
Some species are also found in a completely different systematic point: Endostelium is part of Pellitida ( Flabellinia ) Protosteliopsis belongs to the Vannellida and Echinosteliopsis and incertae sedis Microglomus are within the Amoebozoa.
Evidence
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- Alternative taxon