Allogromiida

The Allogromiida are an order usually bearing housing, sea or süßwasserbewohnender protozoa from the group of foraminifera. In it, there are many species that differ significantly from the usual image of a foraminifer.

Characteristics and lifestyle

As far as housing are available, they are mostly single chamber, rarely agglutinated particles from found, very rarely missing housing completely. They have a wall made of organic material, which secrete the animals. The casing are small, have one or more openings in the cabinet and may have a ferrous crust on the surface.

The order has a high ecological diversity. Although they are mainly found in seas, but in addition there are also some fifty species that are native to freshwater (eg Reticulomyxa Filosa ) and a very small number of proven terrestrial species ( Edaphoallogromia austr alica, Allogromia fluviatilis).

System

Since the classification of foraminifera based on gehäusemorphologischen features fall almost all soft-shelled, single-chamber taxa in this group, regardless of their evolutionary relationship. It consists of only four families with a total of 56 genera, including the extinct Maylisoriidae. In addition, individual taxa are made to order, but without being assigned to a family ( Reticulomyxa ). The order is occupied fossil since the upper Cambrian.

• Lagynidae
• Allogromiidae
• Phthanotrochidae
• Maylisoriidae †

Molecular genetic studies contradict the autonomy of the order, phylogenetically are the types contained with the Astrorhizida a common group.

Evidence

• Foraminifera
• Foraminifera