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Planaria Torva
''Planaria torva'' is a species of Tricladida, planarian in the family Planariidae. When an individual is cut into pieces, each piece has the ability to regenerate into a fully formed individual. Diet The food of ''P. torva'' consists of freshwater gastropods, tubificid worms, and freshwater arthropods, such as isopods of the genus ''Asellus'' and chironomid larvae, although it shows a clear preference for snails. In the United Kingdom, ''P. torva'' is a successful predator of the invasive New Zealand mud snail (''Potamopyrgus jenkinsi''). References Continenticola {{flatworm-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Species
A species () is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can produce fertile offspring, typically by sexual reproduction. It is the basic unit of Taxonomy (biology), classification and a taxonomic rank of an organism, as well as a unit of biodiversity. Other ways of defining species include their karyotype, DNA sequence, morphology (biology), morphology, behaviour, or ecological niche. In addition, palaeontologists 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. About 14% of these had been described by 2011. All species (except viruses) are given a binomial nomenclature, two-part name, a "binomen". The first part of a binomen is the name of a genus to which the species belongs. The second part is called the specific name (zoology), specific name or the specific ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tricladida
Planarians (triclads) are free-living flatworms of the class Turbellaria, order Tricladida, which includes hundreds of species, found in freshwater, marine, and terrestrial habitats.pp 3., "Planarians (the popular name for the group as a whole), or triclad flatworms (the more scientific designation of the same group), are acoelomate bilaterians". Planarians are characterized by a three-branched intestine, including a single anterior and two posterior branches. Their body is populated by adult stem cells called neoblasts, which planarians use for regenerating missing body parts. Many species are able to regenerate any missing organ, which has made planarians a popular model in research of regeneration and stem cell biology. The genome sequences of several species are available, as are tools for molecular biology analysis. The order Tricladida is split into three suborders, according to their phylogenetic relationships: Maricola, Cavernicola and Continenticola. Formerly, the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Planariidae
Planariidae is a family of freshwater planarians. The type genus is '' Planaria'' Müller, 1776.Ball IR: A contribution to the phylogeny and biogeography of the freshwater triclads (Platyhelminthes: Turbellaria). Biology of the Turbellaria (Edited by: Riser NW and Morse MP). New York: McGraw-Hill New York 1974 , 339-401. Genera Twelve genera of Planariidae are known: * '' Atrioplanaria'' * '' Bdellasimilis'' * '' Crenobia'' * '' Digonoporus'' * ''Hymanella'' * '' Ijimia'' * '' Paraplanaria'' * '' Phagocata'' * '' Plagnolia'' * '' Planaria'' * ''Polycelis ''Polycelis'' is a genus of planarians in the family Planariidae found in the Holarctic region (North America and Eurasia). The genus was described in 1831 by Christian Gottfried Ehrenberg and currently has no consensus on the exact number of spe ...'' * '' Seidlia'' Phylogeny Phylogenetic supertree after Sluys et al., 2009: References {{Authority control Continenticola Taxa named by William Stimpson Platyhe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gastropod
Gastropods (), commonly known as slugs and snails, belong to a large Taxonomy (biology), taxonomic class of invertebrates within the phylum Mollusca called Gastropoda (). This class comprises snails and slugs from saltwater, freshwater, and from the land. There are many thousands of species of sea snails and sea slug, slugs, as well as freshwater snails, freshwater limpets, land snails and slugs. The class Gastropoda is a diverse and highly successful class of mollusks within the phylum Mollusca. It contains a vast total of named species, second only to the insects in overall number. The fossil history of this class goes back to the Furongian, Late Cambrian. , 721 family (taxonomy), families of gastropods are known, of which 245 are extinct and appear only in the fossil record, while 476 are currently neontology, extant living fossil, with or without a fossil record. Gastropoda (previously known as univalves and sometimes spelled "Gasteropoda") are a major part of the phylum Mo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tubificid
The Naididae (including the former family Tubificidae) are a family of clitellate oligochaete worms like the sludge worm, ''Tubifex tubifex''. They are key components of the benthic communities of many freshwater and marine ecosystems. In freshwater aquaria they may be referred to as detritus worms. Description These worms can vary in size, from centimeters to millimeters, depending on the subfamily. They are all hermaphroditic and lack a larval stage. Taxonomy Analysis of 18S rDNA sequences revealed that the traditional family Tubificidae is not monophyletic, with the traditionally circumscribed Naididae nested within tubificid taxa. To avoid paraphyly the naidid and tubificid taxa were included in a combined family, which took the name Naididae because it has priority under ''International Code of Zoological Nomenclature'' rules as the senior synonym of Tubificidae. A proposal to the International Commission on Zoological Nomenclature to suppress Naididae, because the "tubifi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arthropod
Arthropods ( ) are invertebrates in the phylum Arthropoda. They possess an arthropod exoskeleton, exoskeleton with a cuticle made of chitin, often Mineralization (biology), mineralised with calcium carbonate, a body with differentiated (Metamerism (biology), metameric) Segmentation (biology), segments, and paired jointed appendages. In order to keep growing, they must go through stages of moulting, a process by which they shed their exoskeleton to reveal a new one. They form an extremely diverse group of up to ten million species. Haemolymph is the analogue of blood for most arthropods. An arthropod has an open circulatory system, with a body cavity called a haemocoel through which haemolymph circulates to the interior Organ (anatomy), organs. Like their exteriors, the internal organs of arthropods are generally built of repeated segments. They have ladder-like nervous systems, with paired Anatomical terms of location#Dorsal and ventral, ventral Ventral nerve cord, nerve cord ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Isopod
Isopoda is an Order (biology), order of crustaceans. Members of this group are called isopods and include both Aquatic animal, aquatic species and Terrestrial animal, terrestrial species such as woodlice. All have rigid, segmented exoskeletons, two pairs of Antenna (biology), antennae, seven pairs of jointed limbs on the Thorax#In_arthropods, thorax, and five pairs of branching appendages on the Abdomen#In other animals, abdomen that are used in Respiration (physiology), respiration. Females brood their young in a pouch under their thorax called the Brood pouch (Peracarida), marsupium. Isopods have various feeding methods: some eat dead or decaying plant and animal matter, others are Grazing (behaviour), grazers or filter feeders, a few are Predation, predators, and some are internal or external parasites, mostly of fish. Aquatic species mostly live on the seabed or the bottom of freshwater body of water, bodies of water, but some Taxon, taxa can swim for short distance. Terre ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asellus
''Asellus'' is a genus of isopod crustaceans in the family Asellidae. Species ''Asellus'' is divided into three subgenera which contain the following species: ''Asellus (Asellus)'' Geoffroy, 1762 * ''Asellus amamiensis'' Matsumoto, 1961 * ''Asellus aquaticus'' (Carl Linnaeus, Linnaeus, 10th edition of Systema Naturae, 1758) * ''Asellus balcanicus'' Karaman, 1952 * ''Asellus epimeralis'' Birstein, 1947 * ''Asellus ezoensis'' Matsumoto, 1962 * ''Asellus hyugaensis'' Matsumoto, 1960 * ''Asellus ismailsezarii'' Malek-Hosseini, Jugovic, Fatemi & Douady, 2022 * ''Asellus kosswigi'' Verovnik, Prevorcnik & Jugovic, 2009 * ''Asellus kumaensis'' Matsumoto, 1960 * ''Asellus levanidovorum'' Henry & Magniez, 1995 * ''Asellus monticola'' Birstein, 1932 * ''Asellus musashiensis'' Matsumoto, 1961 * ''Asellus primoryensis'' Henry & Magniez, 1993 * ''Asellus shikokuensis'' Matsumoto, 1960 * ''Asellus tamaensis'' Matsumoto, 1960 * ''Asellus turanaicus'' Sidorov & Prevorčnik, 2016 * ''Asellus hilg ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chironomid
Chironomidae , commonly known as non-biting midges or chironomids , are a family of Nematoceran flies with a global distribution. They are closely related to the families Ceratopogonidae, Simuliidae, and Thaumaleidae. Although many chironomid species superficially resemble mosquitoes, they can be distinguished by the absence of wing scales and elongated mouthparts characteristic of the Culicidae (true mosquitoes). The name Chironomidae stems from the Ancient Greek word ''kheironómos'', "a pantomimist". Common names and biodiversity This is a large taxon of insects. Some estimates of the species numbers suggest well over 10,000 world-wide. Males are easily recognized by their plumose antennae. Adults are known by a variety of vague and inconsistent common names, largely by confusion with other insects. For example, chironomids are known as "lake flies" in parts of Canada and Lake Winnebago, Wisconsin, but "bay flies" in the areas near the bay of Green Bay, Wisconsin. They ar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
