Miliolida

Marginopora sp., ( Soritidae )

The Miliolida are an order bearing housing, meeresbewohnender protozoa from the group of foraminifera.

Features

The species of the order form housing made ​​of high -magnesium calcite (> 5 mol% magnesium), which secrete a rod-shaped, 1.5 to 2 microns long and 0.24 microns thick crystals in a random arrangement. The housings are milky translucent and porcelain -like surface, in adult animals (except some fossil genera ) imperforate.

Some species are details of propagation known, there are numerous gametes with two flagella and a characteristic long kinetoplast and Axostyl released into the water column.

In addition to the Rotaliida and Globigerinida the Miliolida are one of three foraminiferal orders that serve as hosts for photosynthesizing endosymbionts. Such symbioses are found in the families of Peneroplidae ( symbionts are here Rhodophyta and Chlorophyta ), the Soritidae ( Chlorophyta, Pyrrophyceae ) and the Alveolinidae ( Bacillariophyceae ).

System

The order is occupied fossil since the Carboniferous. Their modern covers eight superfamilies ( family selection):

• Superfamily Squamulinacea Family Squamulinidae

• Family Cornuspiridae

• Family Hemigordiopsidae

• Family Nubeculariidae
• Family Fischerinidae
• Family Cornuspiridae

• Family Discospirinidae

• Family Hauerinidae
• Family Spiroloculinidae
• Family Miliolidae
• Family Tubinellidae

• Family Alveolinidae
• Family Keramosphaeridae

• Family Peneroplidae
• Family Soritidae

Evidence

• Barun K. Sen Gupta: Systematics of modern Foraminifera, In: Barun K. Sen Gupta (ed. ): Modern Foraminifera. Springer Netherlands ( Kluwer Academic ), 2002, ISBN 978-1-4020-0598-5, p 27