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Chaetogaster
''Chaetogaster'' is a genus belonging to the segmented worms ( Annelida). It is classified in the family Naididae (subfamily Naidinae) in the order Oligochaeta. These are ca. 2–25 mm long transparent worms that are very common in fresh water and often form chains of individuals through asexual multiplication. Morphology Externally, the animals correspond to the general building plan of the Naididae, however, in distinction from the other species, they bear setae (bristles) only on their ventral side, which is what gives them their name. The size of the worms, and of their setae too, is very variable even within single species. Distribution and feeding These worms occur mostly in stagnant or flowing freshwater, but the largest species, C''haetogaster diaphanus'', also lives in brackish water. All species seem to be widely distributed within Europe and in addition, many species are found on multiple continents. The animals are usually very active but cannot swi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chaetogaster Limnaei
''Chaetogaster'' is a genus belonging to the segmented worms ( Annelida). It is classified in the family Naididae (subfamily Naidinae) in the order Oligochaeta. These are ca. 2–25 mm long transparent worms that are very common in fresh water and often form chains of individuals through asexual multiplication. Morphology Externally, the animals correspond to the general building plan of the Naididae, however, in distinction from the other species, they bear setae (bristles) only on their ventral side, which is what gives them their name. The size of the worms, and of their setae too, is very variable even within single species. Distribution and feeding These worms occur mostly in stagnant or flowing freshwater, but the largest species, C''haetogaster diaphanus'', also lives in brackish water. All species seem to be widely distributed within Europe and in addition, many species are found on multiple continents. The animals are usually very active but cannot swim purpose ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chaetogaster Diaphanous
''Chaetogaster'' is a genus belonging to the segmented worms ( Annelida). It is classified in the family Naididae (subfamily Naidinae) in the order Oligochaeta. These are ca. 2–25 mm long transparent worms that are very common in fresh water and often form chains of individuals through asexual multiplication. Morphology Externally, the animals correspond to the general building plan of the Naididae, however, in distinction from the other species, they bear setae (bristles) only on their ventral side, which is what gives them their name. The size of the worms, and of their setae too, is very variable even within single species. Distribution and feeding These worms occur mostly in stagnant or flowing freshwater, but the largest species, C''haetogaster diaphanus'', also lives in brackish water. All species seem to be widely distributed within Europe and in addition, many species are found on multiple continents. The animals are usually very active but cannot swim purpo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chaetogaster Setosus
''Chaetogaster'' is a genus belonging to the segmented worms ( Annelida). It is classified in the family Naididae (subfamily Naidinae) in the order Oligochaeta. These are ca. 2–25 mm long transparent worms that are very common in fresh water and often form chains of individuals through asexual multiplication. Morphology Externally, the animals correspond to the general building plan of the Naididae, however, in distinction from the other species, they bear setae (bristles) only on their ventral side, which is what gives them their name. The size of the worms, and of their setae too, is very variable even within single species. Distribution and feeding These worms occur mostly in stagnant or flowing freshwater, but the largest species, C''haetogaster diaphanus'', also lives in brackish water. All species seem to be widely distributed within Europe and in addition, many species are found on multiple continents. The animals are usually very active but cannot swim purpose ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chaetogaster Parvus
''Chaetogaster'' is a genus belonging to the segmented worms ( Annelida). It is classified in the family Naididae (subfamily Naidinae) in the order Oligochaeta. These are ca. 2–25 mm long transparent worms that are very common in fresh water and often form chains of individuals through asexual multiplication. Morphology Externally, the animals correspond to the general building plan of the Naididae, however, in distinction from the other species, they bear setae (bristles) only on their ventral side, which is what gives them their name. The size of the worms, and of their setae too, is very variable even within single species. Distribution and feeding These worms occur mostly in stagnant or flowing freshwater, but the largest species, C''haetogaster diaphanus'', also lives in brackish water. All species seem to be widely distributed within Europe and in addition, many species are found on multiple continents. The animals are usually very active but cannot swim purp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chaetogaster Langi
''Chaetogaster'' is a genus belonging to the segmented worms ( Annelida). It is classified in the family Naididae (subfamily Naidinae) in the order Oligochaeta. These are ca. 2–25 mm long transparent worms that are very common in fresh water and often form chains of individuals through asexual multiplication. Morphology Externally, the animals correspond to the general building plan of the Naididae, however, in distinction from the other species, they bear setae (bristles) only on their ventral side, which is what gives them their name. The size of the worms, and of their setae too, is very variable even within single species. Distribution and feeding These worms occur mostly in stagnant or flowing freshwater, but the largest species, C''haetogaster diaphanus'', also lives in brackish water. All species seem to be widely distributed within Europe and in addition, many species are found on multiple continents. The animals are usually very active but cannot swim purpose ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chaetogaster Krasnopolskiae
''Chaetogaster'' is a genus belonging to the segmented worms ( Annelida). It is classified in the family Naididae (subfamily Naidinae) in the order Oligochaeta. These are ca. 2–25 mm long transparent worms that are very common in fresh water and often form chains of individuals through asexual multiplication. Morphology Externally, the animals correspond to the general building plan of the Naididae, however, in distinction from the other species, they bear setae (bristles) only on their ventral side, which is what gives them their name. The size of the worms, and of their setae too, is very variable even within single species. Distribution and feeding These worms occur mostly in stagnant or flowing freshwater, but the largest species, C''haetogaster diaphanus'', also lives in brackish water. All species seem to be widely distributed within Europe and in addition, many species are found on multiple continents. The animals are usually very active but cannot swim purpo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chaetogaster Cristallinus
''Chaetogaster'' is a genus belonging to the segmented worms ( Annelida). It is classified in the family Naididae (subfamily Naidinae) in the order Oligochaeta. These are ca. 2–25 mm long transparent worms that are very common in fresh water and often form chains of individuals through asexual multiplication. Morphology Externally, the animals correspond to the general building plan of the Naididae, however, in distinction from the other species, they bear setae (bristles) only on their ventral side, which is what gives them their name. The size of the worms, and of their setae too, is very variable even within single species. Distribution and feeding These worms occur mostly in stagnant or flowing freshwater, but the largest species, C''haetogaster diaphanus'', also lives in brackish water. All species seem to be widely distributed within Europe and in addition, many species are found on multiple continents. The animals are usually very active but cannot swim purpose ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Subspecies
In biological classification, subspecies is a rank below species, used for populations that live in different areas and vary in size, shape, or other physical characteristics ( morphology), but that can successfully interbreed. Not all species have subspecies, but for those that do there must be at least two. Subspecies is abbreviated subsp. or ssp. and the singular and plural forms are the same ("the subspecies is" or "the subspecies are"). In zoology, under the International Code of Zoological Nomenclature, the subspecies is the only taxonomic rank below that of species that can receive a name. In botany and mycology, under the International Code of Nomenclature for algae, fungi, and plants, other infraspecific ranks, such as variety, may be named. In bacteriology and virology, under standard bacterial nomenclature and virus nomenclature, there are recommendations but not strict requirements for recognizing other important infraspecific ranks. A taxonomist decides w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Species
In biology, a species is the basic unit of Taxonomy (biology), classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can reproduction, produce Fertility, fertile offspring, typically by sexual reproduction. Other ways of defining species include their karyotype, DNA sequence, morphology (biology), morphology, behaviour or ecological niche. In addition, paleontologists use the concept of the chronospecies since fossil reproduction cannot be examined. The most recent rigorous estimate for the total number of species of eukaryotes is between 8 and 8.7 million. However, only about 14% of these had been described by 2011. All species (except viruses) are given a binomial nomenclature, two-part name, a "binomial". The first part of a binomial is the genus to which the species belongs. The second part is called the specifi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rotifer
The rotifers (, from the Latin , "wheel", and , "bearing"), commonly called wheel animals or wheel animalcules, make up a phylum (Rotifera ) of microscopic and near-microscopic pseudocoelomate animals. They were first described by Rev. John Harris in 1696, and other forms were described by Antonie van Leeuwenhoek in 1703. Most rotifers are around long (although their size can range from to over ), and are common in freshwater environments throughout the world with a few saltwater species. Some rotifers are free swimming and truly planktonic, others move by inchworming along a substrate, and some are sessile, living inside tubes or gelatinous holdfasts that are attached to a substrate. About 25 species are colonial (e.g., ''Sinantherina semibullata''), either sessile or planktonic. Rotifers are an important part of the freshwater zooplankton, being a major foodsource and with many species also contributing to the decomposition of soil organic matter. Most species of the r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Water Flea
The Diplostraca or Cladocera, commonly known as water fleas, are a superorder of small crustaceans that feed on microscopic chunks of organic matter (excluding some predatory forms). Over 1000 species have been recognised so far, with many more undescribed. The oldest fossils of diplostracans date to the Jurassic, though their modern morphology suggests that they originated substantially earlier, during the Paleozoic. Some have also adapted to a life in the ocean, the only members of Branchiopoda to do so, even if several anostracans live in hypersaline lakes. Most are long, with a down-turned head with a single median compound eye, and a carapace covering the apparently unsegmented thorax and abdomen. Most species show cyclical parthenogenesis, where asexual reproduction is occasionally supplemented by sexual reproduction, which produces resting eggs that allow the species to survive harsh conditions and disperse to distant habitats. Description They are mostly long, with ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
