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Heterelmis
''Heterelmis'' is a genus of beetles in the riffle beetle family Elmidae. Species include: *''Heterelmis comalensis'' *''Heterelmis glabra'' *''Heterelmis obesa'' *''Heterelmis obscura'' *extinct, †''Heterelmis stephani'' *''Heterelmis tarsalis'' *''Heterelmis vulnerata'' References Byrrhoidea genera Elmidae {{Elmidae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Heterelmis Comalensis
''Heterelmis comalensis'' is a rare species of beetle known by the common name Comal Springs riffle beetle. It is endemic to Texas in the United States, where it occurs in only two springs. It is a federally listed endangered species of the United States. Description This beetle was described as a new species in 1988. It is about long. It has nonfunctional wings and cannot fly. Habitat and conservation The beetle lives in Comal Springs in Comal County and San Marcos Springs in Hays County, Texas. It occurs in shallow water in the gravel Gravel is a loose aggregation of rock fragments. Gravel occurs naturally throughout the world as a result of sedimentary and erosive geologic processes; it is also produced in large quantities commercially as crushed stone. Gravel is classifi ... substrate and in riffles. It lives alongside other species such as the beetle '' Microcylloepus pusillus''. The main threat to this rare species is the slow loss of the Edwards Aquifer, w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Heterelmis Obesa
''Heterelmis obesa'' is a species of riffle beetle in the family Elmidae Elmidae, commonly known as riffle beetles, is a family of beetles in the superfamily Byrrhoidea described by John Curtis in 1830. Both adults and larvae are usually aquatic, living under rocks in fast-flowing shallow areas of streams, such as .... It is found in Central America, North America, and South America. Subspecies These two subspecies belong to the species ''Heterelmis obesa'': * ''Heterelmis obesa obesa'' * ''Heterelmis obesa plana'' Hinton, 1936 References Further reading * * Elmidae Articles created by Qbugbot Beetles described in 1882 {{Elateriformia-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Heterelmis Glabra
''Heterelmis glabra'' is a species of riffle beetle in the family Elmidae Elmidae, commonly known as riffle beetles, is a family of beetles in the superfamily Byrrhoidea described by John Curtis in 1830. Both adults and larvae are usually aquatic, living under rocks in fast-flowing shallow areas of streams, such as .... It is found in Central America and North America. The largest populations of this riffle beetle are found in springs associated with the upper Devils River in south-central Texas. Spring-adapted organisms such as this beetle have life-history patterns requiring surface components, which makes them more vulnerable to changes in spring flow that alter the surface habitat. References Further reading * * Elmidae Articles created by Qbugbot Beetles described in 1870 {{Elateriformia-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Heterelmis Vulnerata
''Heterelmis vulnerata'' is a species of riffle beetle in the family Elmidae Elmidae, commonly known as riffle beetles, is a family of beetles in the superfamily Byrrhoidea described by John Curtis in 1830. Both adults and larvae are usually aquatic, living under rocks in fast-flowing shallow areas of streams, such as .... It is found in Central America and North America. References Further reading * * Elmidae Articles created by Qbugbot Beetles described in 1874 {{Elateriformia-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Heterelmis Stephani
''Heterelmis stephani'' was a rare species of aquatic beetle known by the common name Stephan's riffle beetle. It was endemic to Arizona in the United States, where it occurred in the Santa Rita Mountains before being declared presumed extinct. It was brown in color with small black dots on its wings. Description The beetle was discovered in 1969 by Karl Stephan, of Tucson, Arizona, after whom the species was named, and formally described as a new species in 1972 by Harley Brown of the University of Oklahoma. Stephan initially collected seven samples on February 6, 1969 and sent them to Brown for identification. When Brown realized the samples were of a new species, he requested more specimens and Stephan collected a further one larval and 64 adult samples on May 16, 1970. It is to long and to in width. It is generally light to dark brown in color, with some parts reddish brown. The male and female are generally similar. The beetle has dozens of small black dots on i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Heterelmis Obscura
''Heterelmis obscura'' is a species of riffle beetle in the family Elmidae Elmidae, commonly known as riffle beetles, is a family of beetles in the superfamily Byrrhoidea described by John Curtis in 1830. Both adults and larvae are usually aquatic, living under rocks in fast-flowing shallow areas of streams, such as .... It is found in Central America and South America. References Further reading * * Elmidae Articles created by Qbugbot Beetles described in 1882 {{Elateriformia-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
David Sharp (entomologist)
David Sharp (18 October 1840 – 27 August 1922) was an English physician and entomologist who worked mainly on Coleoptera. He was among the most prolific publishers in the history of entomology with more than 250 papers that included seven major revisions and reviews and a highly influential work on the structure and modifications of the male genital structures among the beetle families. He was the editor of the Zoological Record for three decades. Biography David Sharp was born at Towcester and lived his early years in Stony Stratford. Some twelve years later his parents removed to London, where he received most of his education. After attending one or two preparatory schools, in 1853 he entered St. John's Foundation School which was then at Kilburn. At the age of seventeen he commenced to help his father, a leather merchant, and about the same time he began collecting beetles, some of his favourite haunts being Ken Wood and Hammersmith Marshes, as well as the sandy shores ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Elmidae
Elmidae, commonly known as riffle beetles, is a family of beetles in the superfamily Byrrhoidea described by John Curtis in 1830. Both adults and larvae are usually aquatic, living under rocks in fast-flowing shallow areas of streams, such as riffles, feeding on algae and biofilms. There are more than 150 genera and 1,500 described species in Elmidae. The oldest record of the group is '' Cretohypsilara'' from the Cenomanian aged Burmese amber Burmese amber, also known as Burmite or Kachin amber, is amber from the Hukawng Valley in northern Myanmar. The amber is dated to around 100 million years ago, during the latest Albian to earliest Cenomanian ages of the mid-Cretaceous period. .... See also * List of Elmidae genera References Further reading * * * * * External links * Polyphaga families {{Elmidae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Extinct
Extinction is the termination of a kind of organism or of a group of kinds ( taxon), usually a species. The moment of extinction is generally considered to be the death of the last individual of the species, although the capacity to breed and recover may have been lost before this point. Because a species' potential range may be very large, determining this moment is difficult, and is usually done retrospectively. This difficulty leads to phenomena such as Lazarus taxa, where a species presumed extinct abruptly "reappears" (typically in the fossil record) after a period of apparent absence. More than 99% of all species that ever lived on Earth, amounting to over five billion species, are estimated to have died out. It is estimated that there are currently around 8.7 million species of eukaryote globally, and possibly many times more if microorganisms, like bacteria, are included. Notable extinct animal species include non-avian dinosaurs, saber-toothed cats, dod ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Byrrhoidea Genera
Byrrhoidea is a superfamily of beetles belonging to Elateriformia that includes several families which are either aquatic or associated with a semi-aquatic habitat. Other than the superfamily Hydrophiloidea, most of the remaining Polyphagan beetles which are aquatic are in this superfamily. Description Adults of many Byrrhoidea have exocone eyes (with expanded corneal lens). The anterior edge of the scutellar shield is often abruptly elevated (except in Psephenidae and Cneoglossidae). A variety of byrrhoids have the first three abdominal ventrites solidly fused together. Larvae of most Limnichiidae have one pair of anal hooks on the tenth abdominal segment, while Cneoglossidae and Ptilodactylidae have three or more hooks on each side of this segment. Larvae of Lutrochidae and Elmidae, as well as the limnichiid genus ''Hyphalus'', have anal gill tufts. Almost all byrrhoid larvae have anterior abdominal spiracles that are biforous (or bilabiate) in shape. The degree of wing ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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