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Eisenia Fetida
''Eisenia fetida'', known under various common names such as manure worm, redworm, brandling worm, panfish worm, trout worm, tiger worm, red wiggler worm, etc., is a species of earthworm adapted to Decomposition, decaying organic material. These worms thrive in rotting vegetation, compost, and manure. They are epigean, rarely found in soil. In this trait, they resemble ''Lumbricus rubellus''. The red wiggler is reddish-brown in color, has small rings around its body, and has a yellowish tail. Groups of bristles (called setae) on each segment of the worm move in and out to grip nearby surfaces as it stretches and contracts its muscles to push itself forward or backward. ''E. fetida'' worms are native to Europe, but have been introduced (both intentionally and unintentionally) to every other continent except Antarctica. ''E. fetida'' also possesses a unique natural defense system in its coelomic fluid; cells called coelomocytes secrete a protein called lysenin, which is a por ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gustav Eisen
Gustavus Augustus Eisen (August 2, 1847 − October 29, 1940) was a Swedish-American polymath. He became a member of California Academy of Sciences in 1874 and a Life Member in 1883. In 1893, he became the 'Curator of Archaeology, Ethnology, and Lower Animals' at the academy. He later changed titles to 'Curator of Marine Invertebrates'. In 1938, he was appointed as an 'Honorary Member', which is considered the highest honor from the academy. Biography Eisen was born in Stockholm, Sweden, on August 2, 1847. He attended school at Visby and later graduated from the University of Uppsala in 1873. He came to California that same year to participate in a biotic survey sponsored by the Swedish Academy of Sciences. He decided to make California his home and joined the California Academy of Sciences the following year. He was known to have diverse interests, including "art and art history, archeology and anthropology, agronomy and horticulture, history of science, geography and cartogra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Earthworm
An earthworm is a soil-dwelling terrestrial invertebrate that belongs to the phylum Annelida. The term is the common name for the largest members of the class (or subclass, depending on the author) Oligochaeta. In classical systems, they were in the order of Opisthopora since the male pores opened posterior to the female pores, although the internal male segments are anterior to the female. Theoretical cladistic studies have placed them in the suborder Lumbricina of the order Haplotaxida, but this may change. Other slang names for earthworms include "dew-worm", "rainworm", "nightcrawler", and "angleworm" (from its use as angling hookbaits). Larger terrestrial earthworms are also called megadriles (which translates to "big worms") as opposed to the microdriles ("small worms") in the semiaquatic families Tubificidae, Lumbricidae and Enchytraeidae. The megadriles are characterized by a distinct clitellum (more extensive than that of microdriles) and a vascular system ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Genus
Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In binomial nomenclature, the genus name forms the first part of the binomial species name for each species within the genus. :E.g. ''Panthera leo'' (lion) and ''Panthera onca'' (jaguar) are two species within the genus ''Panthera''. ''Panthera'' is a genus within the family Felidae. The composition of a genus is determined by taxonomy (biology), taxonomists. The standards for genus classification are not strictly codified, so different authorities often produce different classifications for genera. There are some general practices used, however, including the idea that a newly defined genus should fulfill these three criteria to be descriptively useful: # monophyly – all descendants of an ancestral taxon are grouped together (i.e. Phylogeneti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wilhelm Michaelsen
Johann Wilhelm Michaelsen (9 October 1860, Hamburg - 18 February 1937) was a German zoologist who was a world authority on the Oligochaeta which includes the earthworms. He named and described more than a thousand new species. Michaelsen was born to Friedrich Rudolph and Johanna Catharina Ferdinandine née Köhn. In 1887 he commenced work at the Hamburg Zoological Museum, at first as a research assistant. He was later to become ''Hauptkustos'' (chief curator). Alfred Lothar Wegener (1880-1930) was a friend of Michaelsen and made use of his biogeographical work for some of his ideas on plate tectonics. Michaelsen named a species of earthworm after him as ''Wegeneriella'' Michaelsen, 1933. He also collaborated with John Stephenson. Though he also worked in the study of Tunicates and Polychaetes, Michaelsen was best known for his work on Oligochaeta. To that end, he travelled to southern regions of South America, Africa and Australia to investigate the fossil records of ancient ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
