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Gigantolaelaps Mattogrossensis
''Gigantolaelaps mattogrossensis'' is a mite from the Americas. It has been found on the marsh rice rat (''Oryzomys palustris''), hispid cotton rat (''Sigmodon hispidus''), black rat (''Rattus rattus''), brown rat (''Rattus norvegicus''), and white-footed mouse (''Peromyscus leucopus'') in the United States (Florida, Georgia, South Carolina, and Texas).; . In Venezuela, it has been recorded from ''Holochilus brasiliensis'', '' Sigmodon hirsutus'', and ''Marmosa robinsoni''. In Argentina, it has been found on '' Scapteromys aquaticus'', ''Oligoryzomys flavescens ''Oligoryzomys flavescens'', also known as the flavescent colilargo or yellow pygmy rice rat is a species of rodent in the genus ''Oligoryzomys'' of family Cricetidae. It is found in southern South America, occurring in southern Brazil, Paraguay, ...'', and ''Holochilus brasiliensis''. The North American form was first described as a separate species, ''Gigantolaelaps cricetidarum'', and is still occasionally considered a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mite
Mites are small arachnids (eight-legged arthropods). Mites span two large orders of arachnids, the Acariformes and the Parasitiformes, which were historically grouped together in the subclass Acari, but genetic analysis does not show clear evidence of a close relationship. Most mites are tiny, less than in length, and have a simple, unsegmented body plan. The small size of most species makes them easily overlooked; some species live in water, many live in soil as decomposers, others live on plants, sometimes creating galls, while others again are Predation, predators or Parasitism, parasites. This last type includes the commercially destructive ''Varroa'' parasite of honey bees, as well as scabies mites of humans. Most species are harmless to humans, but a few are associated with allergies or may transmit diseases. The scientific discipline devoted to the study of mites is called acarology. Evolution and taxonomy The mites are not a defined taxon, but is used for two disti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Marsh Rice Rat
The marsh rice rat (''Oryzomys palustris'') is a semiaquatic North American rodent in the family Cricetidae. It usually occurs in wetland habitats, such as swamps and salt marshes. It is found mostly in the eastern and southern United States, from New Jersey and Kansas south to Florida and northeasternmost Tamaulipas, Mexico; its range previously extended further west and north, where it may have been a commensalism, commensal in corn-cultivating communities. Weighing about , the marsh rice rat is a medium-sized rodent that resembles the common black rat, black and brown rat. The upperparts are generally gray-brown, but are reddish in many Florida populations. The feet show several specializations for life in the water. The skull is large and flattened, and is short at the front. John Bachman discovered the marsh rice rat in 1816, and it was formally described in 1837. Several subspecies have been described since the 1890s, mainly from Florida, but disagreement exists over their ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hispid Cotton Rat
The hispid cotton rat (''Sigmodon hispidus'') is a rodent species long thought to occur in parts of South America, Central America, and southern North America. However, recent taxonomic revisions, based on mitochondrial DNA sequence data, have split this widely distributed species into three separate species (''S. hispidus'', ''S. toltecus'', and ''S. hirsutus''). The distribution of ''S. hispidus'' ranges from Arizona in the west to Virginia to the east and from the Platte River in Nebraska in the north to, likely, the Rio Grande in the south, where it meets the northern edge of the distribution of '' S. toltecus'' (formerly ''S. h. toltecus''). Adult size is total length ; tail , frequently broken or stubbed; hind foot ; ear ; mass . They have been used as laboratory animals. Taxonomy The currently accepted scientific name for the hispid cotton rat is ''Sigmodon hispidus''. It is a member of the family Cricetidae.(Animal Diversity Web, University of Michigan Museum of Zoolo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Black Rat
The black rat (''Rattus rattus''), also known as the roof rat, ship rat, or house rat, is a common long-tailed rodent of the stereotypical rat genus ''Rattus'', in the subfamily Murinae. It likely originated in the Indian subcontinent, but is now found worldwide. The black rat is black to light brown in colour with a lighter underside. It is a generalist omnivore and a serious pest to farmers because it feeds on a wide range of agricultural crops. It is sometimes kept as a pet. In parts of India, it is considered sacred and respected in the Karni Mata Temple in Deshnoke. Taxonomy ''Mus rattus'' was the scientific name proposed by Carl Linnaeus in 1758 for the black rat. Three subspecies were once recognized, but today are considered invalid and are now known to be actually color morphs: *''Rattus rattus rattus'' – roof rat *''Rattus rattus alexandrinus'' – Alexandrine rat *''Rattus rattus frugivorus'' – fruit rat Characteristics A typical adult black rat is long, n ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brown Rat
The brown rat (''Rattus norvegicus''), also known as the common rat, street rat, sewer rat, wharf rat, Hanover rat, Norway rat, Norwegian rat and Parisian rat, is a widespread species of common rat. One of the largest muroids, it is a brown or grey rodent with a head and body length of up to long, and a tail slightly shorter than that. It weighs between . Thought to have originated in northern China and neighbouring areas, this rodent has now spread to all continents except Antarctica, and is the dominant rat in Europe and much of North America. With rare exceptions, the brown rat lives wherever humans live, particularly in urban areas. Selective breeding of the brown rat has produced the fancy rat (rats kept as pets), as well as the laboratory rat (rats used as model organisms in biological research). Both fancy rats and laboratory rats are of the domesticated subspecies ''Rattus norvegicus domestica''. Studies of wild rats in New York City have shown that populations livi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
White-footed Mouse
The white-footed mouse (''Peromyscus leucopus'') is a rodent native to North America from Ontario, Quebec, Labrador, and the Maritime Provinces (excluding the island of Newfoundland) to the southwestern United States and Mexico. In the Maritimes, its only location is a disjunct population in southern Nova Scotia. It is also known as the woodmouse, particularly in Texas. Description Adults are in length, not counting the tail, which can add another . A young adult weighs . While their maximum lifespan is 96 months, the mean life expectancy for the species is 45.5 months for females and 47.5 for males. In northern climates, the average life expectancy is 12–24 months. The species is similar to ''Peromyscus maniculatus''. White-footed Mouse, Quetico.jpg, In Quetico Provincial Park, Ontario File:Rhus typhina-Peromyscus leucopus-female.jpg, Female on a staghorn sumac Behavior and diet White-footed mice are omnivorous, and eat seeds and insects. They are timid and generally avoid ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Holochilus Brasiliensis
''Holochilus brasiliensis'', also known as the Brazilian marsh ratMusser, G.G. and Carleton, M.D. 2005. Superfamily Muroidea. Pp. 894–1531 in Wilson, D.E. and Reeder, D.M. (eds.)Mammal Species of the World: a taxonomic and geographic reference. 3rd ed Baltimore: The Johns Hopkins University Press, 2 vols., 2142 pp. or web-footed marsh rat, is a species of semiaquatic rodent from South America. It is found in northeastern Argentina, southern and eastern Brazil and in eastern Uruguay. Description This is a medium sized species compared with other members of the genus; the head-and-body length is between and the tail length is between . The fur is luxuriant and dense. The dorsal colour is cinnamon, the flanks are a brighter orange and the underparts a paler orange, apart from a white throat and chest and some white in the unguinal area. Distribution and habitat ''H. brasiliensis'' is semiaquatic and occurs in eastern and southern Brazil, Uruguay, eastern Paraguay and northe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sigmodon Hirsutus
The southern cotton rat (''Sigmodon hirsutus'') is a rodent species in the family Cricetidae. It is found from southern Chiapas in Mexico through Central America, except for Belize, and as far east as northern Colombia and Venezuela. It lives in tropical rainforest, dry forest and savanna, as well as in cultivated areas. The species is terrestrial and primarily diurnal. It was long thought to be a subspecies of '' S. hispidus''. However, recent taxonomic revisions, based on mitochondrial DNA sequence data, have split the extensive former species range into three separate species. Carroll et al. (2004) indicate that the southern edge of the ''S. hispidus'' distribution is likely near the Rio Grande where it meets the northern distribution of '' S. toltecus'' (formerly ''S. h. toltecus''). The range of ''S. toltecus'' extends from northern Mexico south into Chiapas where it occurs in sympatry In biology, two related species or populations are considered sympatric when they e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Marmosa Robinsoni
Robinson's mouse opossum (''Marmosa robinsoni'') is a species of opossum in the family Didelphidae. It is found in Belize, Colombia, Ecuador, Grenada, Honduras, Panama, Peru, Trinidad and Tobago, and Venezuela. Robinson's mouse opossums move along tree branches and vines with the help of a prehensile tail and may leap between gaps as they search for fruit and insects. Description ''Marmosa robinsoni'' is typically cinnamon brown with a yellow underside. Its dorsal color varies from russet to gray. The top of the head is generally paler in color than the rest of the body. The black facial mask is always present but varies in size according to the region of that individual. It possesses a prehensile tail about 1.3 times its body length, which is covered in fine white hairs. Its feet are modified for grasping with pads and an opposable hallux. Habitat The species occupies a variety of habitats from sea level to 2,600 m elevation, including lowland and montane moist forests, lo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scapteromys Aquaticus
The Argentine swamp rat (''Scapteromys aquaticus'') is a semiaquatic rodent species from South America. It is found in northeastern Argentina and Paraguay, where it lives in freshwater marshes and along the southern coast of the Río de la Plata estuary, as well as in woodland. It is characterized by having stiff hairs on its otherwise naked tail, which are believed to help the animal swim. ''S. aquaticus'' is similar in build to members of the genus ''Rattus''. “ thas a relatively larger head, a stouter body, larger feet, and a relatively longer tail.” The pelage along its back is “long and glossy” varying from brown to dark brown. It can have a grayish wash in some individuals. “The sides have a yellowish cast.” The pelage in the abdominal region is typically an off white color. The forefeet are large for use in swimming and digging. All digits, including the pollex are equipped with a claw. Its karyotype has 2n = 32. Conservation According to the IUCN Red List ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oligoryzomys Flavescens
''Oligoryzomys flavescens'', also known as the flavescent colilargo or yellow pygmy rice rat is a species of rodent in the genus ''Oligoryzomys'' of family Cricetidae. It is found in southern South America, occurring in southern Brazil, Paraguay, Uruguay, and northeastern Argentina. Its karyotype has 2n = 64-66 and FNa = 66-70. Description The dorsal fur of ''Oligoryzomys flavescens'' consists of bright orangish-brown hairs mixed with blackish hairs, the hairs on the flanks are all orange and the underparts are yellowish-grey. The boundary between the upper parts and the underparts is indistinct, grading from one colour to the other. The head-and-body length averages and the tails averages . Skull features that distinguish this species include the long incisive foramina (openings in the hard palate) that usually reach the first molar, and the short mesopterygoid fossa (a depression behind the end of the palate) which does not extend as far as the third molar. Distribution ''O ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Laelapidae
The Laelapidae are a family (biology), family of mites in the order Mesostigmata. The family is also referred to in the literature as Laelaptidae, which may be the correct spelling. Description Laelapidae have a shield covering all or most of the dorsal surface (holodorsal shield). Ventrally, there is a sternal shield with 3 pairs of Seta, setae, a tongue- or flask-shaped genital shield (greatly expanded in ''Ololaelaps'') with usually at least 1 pair of setae, and a small anal shield with 3 circumanal setae. The peritremes are typically long and the peritrematal shields often narrow. Ecology Laelapidae is the most ecologically diverse group of Mesostigmata. As of 2012, there were ten laelapid genera known to be free-living Predation, predators in soil, thirty-five that are Parasitism, ectoparasites on mammals (e.g. Rodent, rodents) and forty-three have species associated with arthropods. Laelapidae are the only family in superfamily Dermanyssoidea to include free-living pred ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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