Christensenia Antarctica
''Christensenia'' is the scientific name of two genera of organisms and may refer to: * ''Christensenia'' (beetle) Brinck, 1945, a genus of beetles in the family Curculionidae * ''Christensenia'' (plant), a genus of ferns in the family Marattiaceae *''Christensia'' Dózsa-Farkas & Convey, 1997, a genus of oligochaete worms in the family Enchytraeidae, and a junior homonym of ''Christensenia'' Brinck, 1945, replaced by ''Christensenidrilus ''Christensenidrilus'' is a genus of annelids belonging to the family Enchytraeidae. Species: * ''Christensenidrilus blocki'' (Dózsa-Farkas & Convey, 1997) References {{Taxonbar, from=Q18519106 Annelids ...

Christensenia (plant)
''Christensenia'' is a genus of ferns in the botanical family Marattiaceae. The genus is confined to the Indo-Malayan region. The basal chromosome number for this genus is 2n=80. ''Christensenia'' is unique in the Marattiaceae, because of its reticulate venation, palmately arranged leaves and radial synangia. ''Christensenia'' produces enormous amounts of spores, up to 7,000 spores per sporangium. The presence of a radial synangium is an archaic character, very similar to some of the fossil Asterothecaceae/ Psaroniaceae, such as '' Scolecopteris''. ''Christensenia'' itself has no fossil record. Species After the 1993 revision by Rolleri, only two species and one variety Variety may refer to: Arts and entertainment Entertainment formats * Variety (radio) * Variety show, in theater and television Films * ''Variety'' (1925 film), a German silent film directed by Ewald Andre Dupont * ''Variety'' (1935 film), ... are recognized: * ''Christensenia aesculifolia'' (Carl L ...
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Enchytraeidae
Enchytraeidae is a family of microdrile oligochaetes. They resemble small earthworms and include both terrestrial species known as potworms that live in highly organic terrestrial environments, as well as some that are marine. The peculiar genus ''Mesenchytraeus'' is known as "ice worms", as they live in glaciers and will die if exposed to temperatures a few degrees above freezing. Apart from these, the best-known species is probably the Grindal Worm (''Enchytraeus buchholzi''), which is commercially bred as aquarium fish food. Selected genera Enchytraeidae genera include:WoRMS (2010) * ''Achaeta'' Vejdovský, 1878 * '' Archienchytraeus'' Eisen, 1878 ('' nomen dubium'') * ''Cernosvitoviella'' Nielsen & Christensen, 1959 * '' Christensenidrilus'' Dózsa-Farkas & Convey, 1998 (= ''Christensenia'' Dózsa-Farkas & Convey, 1997 (''non'' Brinck 1945: preoccupied)) * ''Cognettia'' Nielsen & Christensen, 1959 * '' Enchytraeina'' Bülow, 1957 * ''Enchytraeus'' * '' Epitelphusa'' Drago, ...
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