Stannomidae

Stannomidae
Stannomid off the Galapagos Islands
Systematics
without rank: Rhizaria without rank: Retaria without rank: Foraminifera (Foraminifera) Xenophyophores (Xenophyophora) Order : Stannomida Family : Stannomidae
Scientific name of the  order
Stannomida
Tendal , 1972
Scientific name of the  family
Stannomidae
Haeckel , 1889

The Stannomidae is a family of unicellular, deep-sea creatures from the group of Xenophyophores and the only family of the order of the Stannomida . It comprises two genera with a total of sixteen species and thus represents the smaller of the two orders of the xenophyophores .

features

The stannomida is characterized by a soft body and the presence of so-called linellae, long, thin, protein-containing fibers made of an organic, cement-like material on the housing. The numerous linellae, measuring several millimeters, have a supporting function, their arrangement (not overgrown, also at points of intersection / attached to one another at points of intersection / network-like to branched together) has taxonomic significance. The cell nuclei of the Stannomida are usually somewhat larger than those of the sister order Psamminida . The family characteristic is the tree-like branched or flaky shape.

distribution

The stannomida are almost exclusively distributed in the Indo-Pacific, the only exception being found in 1980 from the North Atlantic near the equator. With the exception of one evidence off the South African coast (30 ° S), all sites were north of 10 ° S at depths of 981 to 6710 Meters, photographs of British expeditions show deposits down to depths of around 7700 meters. Find reports from shallower water are considered dubious.

ecology

Little is known about ecology. The temperatures of the surrounding water are usually between 0 and 4 degrees, but a single measurement resulted in 10.3 ° C. One species is known as the predator Neopilina galatheae . The majority of the material used for the construction of the housing is the housing of radiolarians , they are usually only loosely agglutinated.

Systematics

The Stannomidae were first described by Ernst Haeckel in 1889, Ole Tendal then placed them in a separate order Stannomida in 1972 as part of his revision of the xenophyophores he understood as a subclass. Tendal's system is still valid today, but was supplemented by a newly described species in 1980. However, there are some so far not validly described species that could be identified as belonging to the Stannomidae, mainly in collections in Denmark and Great Britain.

• Stannomida
  • Stannomidae
    • Stannoma
      • Stannoma dendroides
      • Stannoma coralloides
    • Stannophyllum
      • Stannophyllum zonarium
      • Stannophyllum globigerinum
      • Stannophyllum granularium
      • Stannophyllum fragilis
      • Stannophyllum radiolarium
      • Stannophyllum pertusum
      • Stannophyllum venosum
      • Stannophyllum indistinctum
      • Stannophyllum alatum
      • Stannophyllum concretum
      • Stannophyllum flustraceum
      • Stannophyllum reticulatum
      • Stannophyllum mollum
      • Stannophyllum setosum

proof

1. ↑ Palaeos: Xenophyophorea ( Memento of the original dated December 14, 2006 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. 
2. ↑ ^{a b c d} O.S. Tendal: A monograph of the Xenophyophoria (Rhizopodea, Protozoa). , In: Galathea Report 12: 7-99, 1972
3. ↑ ^{a b} O.S. Tendal: Synoptic checklist and bibliography of the Xenophyophorea (Protista), with a zoogeographical survey of the group In: Galathea Report 17, 1996
4. ↑ ^{a b} O.S. Tendal: Xenophyophores (Protozoa, Sarcodina) in the diet of Neopilina galatheae. (Mollusca, Monoplacophora) In: Galathea Report, 16: 95-98