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Pyrgulopsis Chihuahua
''Pyrgulopsis'' is a genus of freshwater snails with a gill and an operculum, aquatic gastropod mollusks in the family Hydrobiidae. Etymology The name ''Pyrgulopsis'' is composed from '' Pyrgula'', another genus of snail, and '' opsis'' = aspect of. Description Generic characters of the genus ''Pyrgulopsis'' are: the shell is minute, conically turreted, somewhat elongated, imperforate and unicarinate. The apex is acute. The aperture is ovate. The edge of the aperture, called the peritreme, is continuous. The operculum is ovate, thin, corneous and spiral, with polar point well forward and approximating the columella. The jaw is thin and membranaceous. The radula is odontophore, with teeth are arranged in transverse rows, according to the formula 3 + 1 + 3. Formula for denticles of rhachidian: . Distribution The distribution of the genus ''Pyrgulopsis'' includes Western and South-western United States. Snails of species in the genus ''Pyrgulopsis'' occur in fres ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pyrgulopsis Nevadensis
The corded purg, scientific name ''Pyrgulopsis nevadensis'', is an extinct species of freshwater snail with a gill and an operculum, an aquatic gastropod mollusk in the family Hydrobiidae. ''Pyrgulopsis nevadensis'' is the type species of the genus '' Pyrgulopsis''. Call R. E. & Pilsbry H. A. 1886. ''On Pyrgulopsis, a new genus of rissoid mollusk, with description of two new forms''Proceeding Davenport Academy of Natural Sciences, volume V. pag914Plate II. figures 1-10. Shell description The shell is small, somewhat elongated, variable, turreted and imperforate. The shell has 4½-5½ whorls, that are strongly unicarinate on periphery, otherwise smooth. The epidermis is shining, light straw in color or whitish. The suture is white. The suture is deeply and regularly impressed, made conspicuous by the approximating carina. There existed also smooth variation.plate II, figure 6-8. The aperture is very oblique, roundly ovate, with an angle on outer edge corresponding to the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Columella (mollusc)
The columella (meaning "little column") or (in older texts) pillar is a central anatomical feature of a coiled snail shell, a gastropod shell. The columella is often only clearly visible as a structure when the shell is broken, sliced in half vertically, or viewed as an X-ray image. The columella runs from the apex of the shell to the midpoint of the undersurface of the shell, or the tip of the siphonal canal in those shells which have a siphonal canal. If a snail shell is visualized as a cone of shelly material which is wrapped around a central axis, then the columella more or less coincides spatially with the central axis of the shell. In the case of shells that have an umbilicus, the columella is a hollow structure. The columella of some groups of gastropod shells can have a number of plications or folds (the columellar fold, plaits or plicae), which are usually visible when looking to the inner lip into the aperture of the shell. These folds can be wide or narrow, prominent ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pyrgulopsis Avernalis
The Moapa pebblesnail also known as the Muddy Valley turban snail, scientific name ''Pyrgulopsis avernalis'', is a species of small freshwater snail with an operculum, an aquatic gastropod mollusk in the family Hydrobiidae. The natural habitat of this species is springs, and it is currently threatened by habitat loss. This species is endemic to the Moapa Valley, Nevada, United States and the common name refers to the Moapa River in Nevada Nevada ( ; ) is a U.S. state, state in the Western United States, Western region of the United States. It is bordered by Oregon to the northwest, Idaho to the northeast, California to the west, Arizona to the southeast, and Utah to the east. N .... Description ''Pyrgulopsis avernalis'' is a small snail that has a height of and ovate conical shell. Its differentiated from other ''Pyrgulopsis'' in that its penial filament has a small lobe and large filament with the penial ornament consisting of a small terminal gland, a gland along the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Edward Harrison Taylor
Edward Harrison Taylor (April 23, 1889 – June 16, 1978) was an American herpetologist from Missouri. Family Taylor was born in Maysville, Missouri, to George and Loretta Taylor. He had an older brother, Eugene. Education Taylor studied at the University of Kansas in Lawrence, Kansas, graduating with a B.A. in 1912. Field trips during his time at the University of Kansas with Dr. Clarence McClung and Dr. Roy Moody helped prepare Taylor for his future endeavors. Between 1916 and 1920 he returned briefly to Kansas to finish his M.A. Career Upon completing his bachelor's degree, Taylor went to the Philippines, where at first he held a teacher's post in a village in central Mindanao. He collected and studied the local herpetofauna extensively and published many papers. He returned to the Philippines after completing his master's degree and was appointed Chief of Fisheries in Manila. On his many survey trips he continued collecting and studying fishes and reptiles of the islan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pyrgulopsis Arizonae
''Pyrgulopsis arizonae'', commonly known as the Apache springsnail, is a species of minute freshwater snails with an operculum, aquatic gastropod molluscs or micromolluscs in the family Hydrobiidae. This species' natural habitat is springs. It is endemic to an unnamed spring on north side of Gila River about north of Bylas, Arizona, United States The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 states, a federal district, five major unincorporated territorie .... Description ''Pyrgulopsis arizonae'' is a small snail that has a height of and a globose to elongate conic shell. Its differentiated from other ''Pyrgulopsis'' in that its penial filament has an elongate lobe and medium length, broad filament with the penial ornament consisting of a large, superficial ventral gland often with a similar dorsal gland. References Molluscs of t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pyrgulopsis Archimedis
''Pyrgulopsis archimedis'', commonly known as the archimedes pyrg, is a species of minute freshwater snails with an operculum, aquatic gastropod molluscs or micromolluscs in the family Hydrobiidae. This species' natural habitat is rivers and lakes. It is endemic to the Upper Klamath Lake and the uppermost portion of the Link River near Algoma, Oregon, United States The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 states, a federal district, five major unincorporated territorie .... Description ''Pyrgulopsis archimedis'' is a small snail that has a height of and a conical shell. Its differentiated from other Pyrgulopsis in that its penial filament has a medium lobe and medium filament with the penial ornament consisting of a short, transverse penial gland, short, transverse terminal gland, and stalked ventral gland. References Moll ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pyrgulopsis Anguina
''Pyrgulopsis'' is a genus of freshwater snails with a gill and an operculum, aquatic gastropod mollusks in the family Hydrobiidae. Etymology The name ''Pyrgulopsis'' is composed from ''Pyrgula'', another genus of snail, and ''opsis'' = aspect of. Description Generic characters of the genus ''Pyrgulopsis'' are: the shell is minute, conically turreted, somewhat elongated, imperforate and unicarinate. The apex is acute. The aperture is ovate. The edge of the aperture, called the peritreme, is continuous. The operculum is ovate, thin, corneous and spiral, with polar point well forward and approximating the columella. The jaw is thin and membranaceous. The radula is odontophore, with teeth are arranged in transverse rows, according to the formula 3 + 1 + 3. Formula for denticles of rhachidian: . Distribution The distribution of the genus ''Pyrgulopsis'' includes Western and South-western United States. Snails of species in the genus ''Pyrgulopsis'' occur in fresh water ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pyrgulopsis Amargosae
The Amargosa springsnail (''Pyrgulopsis amargosae'') is a snail in the family Hydrobiidae. It is endemic to the Amargosa River drainage of the southwestern United States. The small (1.5–2.7 mm high) snail is known to occur in several near-brackish springs, including the type locality of Saratoga Springs in Death Valley Death Valley is a desert valley in Eastern California, in the northern Mojave Desert, bordering the Great Basin Desert. During summer, it is the Highest temperature recorded on Earth, hottest place on Earth. Death Valley's Badwater Basin is the .... References Pyrgulopsis Molluscs of the United States Endemic fauna of California Freshwater animals of North America Death Valley Gastropods described in 1989 {{Hydrobiidae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Duckwater Pyrg
The Duckwater pyrg, scientific name ''Pyrgulopsis aloba'', is a species of freshwater snail in the family Hydrobiidae. It is endemic to the United States and only known from two springs in the Duckwater Reservation, Nye County, Nevada Nye County is a county in the U.S. state of Nevada. As of the 2020 census, the population was 51,591. Its county seat is Tonopah. At , Nye is Nevada's largest county by area and the third-largest county in the contiguous United States, behi .... It is a small ''Pyrgulopsis'' with a shell height of and shell width of . References Pyrgulopsis Molluscs of the United States Endemic fauna of Nevada Freshwater animals of North America Gastropods described in 1998 Taxonomy articles created by Polbot {{Hydrobiidae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pyrgulopsis Aloba
The Duckwater pyrg, scientific name ''Pyrgulopsis aloba'', is a species of freshwater snail in the family Hydrobiidae. It is endemic to the United States and only known from two springs in the Duckwater Reservation, Nye County, Nevada Nye County is a county in the U.S. state of Nevada. As of the 2020 census, the population was 51,591. Its county seat is Tonopah. At , Nye is Nevada's largest county by area and the third-largest county in the contiguous United States, behi .... It is a small ''Pyrgulopsis'' with a shell height of and shell width of . References Pyrgulopsis Molluscs of the United States Endemic fauna of Nevada Freshwater animals of North America Gastropods described in 1998 Taxonomy articles created by Polbot {{Hydrobiidae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pyrgulopsis Aardahli
''Pyrgulopsis aardahli'', commonly known as the Benton Valley springsnail, is a species of freshwater snails in the family Hydrobiidae. This species' natural habitat is springs. It is endemic to a spring on the Bramlette Ranch, Mono County, California, United States The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 states, a federal district, five major unincorporated territorie .... Description ''Pyrgulopsis aardahli'' is a small snail that has a height of and ovate to conical shell. Its differentiated from other ''Pyrgulopsis'' in that its penis has a very small lobe and short filament with the penial ornament consisting of a small, circular terminal gland and a stalked ventral gland. References aardahli Molluscs of the United States Endemic fauna of California Freshwater animals of North America Gastropods described in 1989 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Freshwater Gastropod
Freshwater snails are gastropod mollusks which live in fresh water. There are many different families. They are found throughout the world in various habitats, ranging from ephemeral pools to the largest lakes, and from small seeps and springs to major rivers. The great majority of freshwater gastropods have a shell, with very few exceptions. Some groups of snails that live in freshwater respire using gills, whereas other groups need to reach the surface to breathe air. In addition, some are amphibious and have both gills and a lung (e.g. ''Ampullariidae''). Most feed on algae, but many are detritivores and some are filter feeders. According to a 2008 review of the taxonomy, there are about 4,000 species of freshwater gastropods (3,795–3,972). At least 33–38 independent lineages of gastropods have successfully colonized freshwater environments. It is not possible to quantify the exact number of these lineages yet, because they have yet to be clarified within the Cerithi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
