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Phreatodrobia
''Phreatodrobia'' is a genus of very small or minute freshwater snails with a gill and an operculum, aquatic gastropod mollusks in the family Lithoglyphidae.Hershler R. & Thompson F. G. (1990). "''Antrorbis breweri'', a new genus and species of hydrobiid cavesnail (Gastropoda) from Coosa River Basin, northeastern Alabama". ''Proceedings of the Biological Society of Washington'' 103(l): 197-204PDF The generic name ''Phreatodrobia'' is derived from the Greek word " phreatos" which means ground water, as in phreatic, and from the suffix ''-drobia'' based on family name Hydrobiidae (where it was originally classified), which means "living in water". Species Species within the genus ''Phreatodrobia'' include: * '' Phreatodrobia conica'' Hershler & Longley, 1986 * '' Phreatodrobia coronae'' Hershler, 1987Hershler & Longley (1987). "Phreatodrobia coronae, a New Species of Cave Snail from Southwestern Texas". '' The Nautilus'' 101(3)133139. * '' Phreatodrobia imitata'' Hershler & Lon ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mimic Cavesnail
The mimic cavesnail, scientific name ''Phreatodrobia imitata'', is a species of very small or minute freshwater snail with a gill and an operculum, an aquatic gastropod mollusk in the family Hydrobiidae.Hershler R. & Thompson F. G. (1990). "''Antrorbis breweri'', a new genus and species of hydrobiid cavesnail (Gastropoda) from Coosa River Basin, northeastern Alabama". '' Proceedings of the Biological Society of Washington'' 103(l): 197-204PDF Distribution This species is endemic to the United States. Type locality is Verstraeten Well, Bexar County, Texas Bexar County ( or ; es, Béxar ) is a county in the U.S. state of Texas. It is in South Texas and its county seat is San Antonio. As of the 2020 census, the population was 2,009,324. Bexar County is included in the San Antonio–New Bra .... Description The shell has 3.3-3.5 whorls. The average height of the shell is 1.01-1.03 mm. References Lithoglyphidae Gastropods described in 1986 Taxonomy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phreatodrobia Imitata
The mimic cavesnail, scientific name ''Phreatodrobia imitata'', is a species of very small or minute freshwater snail with a gill and an operculum, an aquatic gastropod mollusk in the family Hydrobiidae.Hershler R. & Thompson F. G. (1990). "''Antrorbis breweri'', a new genus and species of hydrobiid cavesnail (Gastropoda) from Coosa River Basin, northeastern Alabama". ''Proceedings of the Biological Society of Washington'' 103(l): 197-204PDF Distribution This species is endemic to the United States. Type locality is Verstraeten Well, Bexar County, Texas. Description The shell has 3.3-3.5 whorls A whorl ( or ) is an individual circle, oval, volution or equivalent in a whorled pattern, which consists of a spiral or multiple concentric objects (including circles, ovals and arcs). Whorls in nature File:Photograph and axial plane floral d .... The average height of the shell is 1.01-1.03 mm. References Lithoglyphidae Gastropods described in 1986 Taxonomy article ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lithoglyphidae
Lithoglyphidae is a family of small freshwater snails with gills and an operculum, aquatic gastropod mollusks. This family is in the superfamily Truncatelloidea and in the clade Littorinimorpha (according to the taxonomy of the Gastropoda by Bouchet & Rocroi, 2005). Taxonomy Taylor (1966), Ponder & Warén (1988) and Kabat & Hershler (1993)Kabat A. R. & Hershler R. (1993). "The prosobranch snail family Hydrobiidae (Gastropoda: Rissooidea): review of classification and supraspecific taxa". ''Smithsonian Contributions to Zoology'' 547: 1-94PDF considered this taxon as a subfamily Lithoglyphinae within Hydrobiidae. Radoman (1983) considered Lithoglyphidae as a separate family. Bernasconi (1992) considered this taxon as a tribe Lithoglyphini in the Hydrobiinae within Hydrobiidae. 2005 taxonomy The family Lithoglyphidae consists of 2 subfamilies according to the taxonomy of the Gastropoda by Bouchet & Rocroi, 2005. It follows Wilke et al. (2001), Hausdorf et al. (2003) and includ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Proceedings Of The Biological Society Of Washington
In academia and librarianship, conference proceedings is a collection of academic papers published in the context of an academic conference or workshop. Conference proceedings typically contain the contributions made by researchers at the conference. They are the written record of the work that is presented to fellow researchers. In many fields, they are published as supplements to academic journals; in some, they are considered the main dissemination route; in others they may be considered grey literature. They are usually distributed in printed or electronic volumes, either before the conference opens or after it has closed. A less common, broader meaning of proceedings are the acts and happenings of an academic field, a learned society. For example, the title of the ''Acta Crystallographica'' journals is New Latin for "Proceedings in Crystallography"; the ''Proceedings of the National Academy of Sciences of the United States of America'' is the main journal of that academy. S ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The Nautilus (journal)
''The Nautilus'' is a peer-reviewed scientific journal covering research in malacology. Hence its scope includes all aspects of the biology, ecology, and systematics of mollusks."THE NAUTILUS A Quarterly Devoted to Malacology" . accessed 19 April 2011. The first two volumes were published by shell trader (1853-1928) under the name ''The Conchologists’ Exchange''.Leal J. H. (2006). "Celebrating a long life: The Nautilus turns 120!". ''The Nautilus'' 120(1): 1-7 From 1958 to 1972, the subtitle of ''The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hydrobiidae
Hydrobiidae, commonly known as mud snails, is a large cosmopolitan family of very small freshwater and brackish water snails with an operculum; they are in the order Littorinimorpha. Distribution Hydrobiidae are found in much of the world, inhabiting all continents except Antarctica. In Australia alone there are over 260 species in the family. Description These are very small or minute snails, with a shell height of less than 8 mm. The dextrally-coiled shells are smooth (except for growth lines conforming to the shape of the outer lip) and are usually rather nondescript. The shell offers very few robust characteristics to the systematist who is attempting to classify the species within this family. This difficulty is compounded by a high degree of intraspecific variation. Descriptions often have to be based on the characteristics of the operculum, radula and penis. The shell of species within this family varies from planispiral to needle-shaped. The shell may ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phreatic
''Phreatic'' is a term used in hydrology to refer to aquifers, in speleology to refer to cave passages, and in volcanology to refer to a type of volcanic eruption. Hydrology The term phreatic (the word originates from the Greek , meaning "well" or "spring") is used in hydrology and the earth sciences to refer to matters relating to ground water (an aquifer) below the water table. The term 'phreatic surface' indicates the location where the pore water pressure is under atmospheric conditions (i.e. the pressure head is zero). This surface normally coincides with the water table. The slope of the phreatic surface is assumed to indicate the direction of ground water movement in an unconfined aquifer. The phreatic zone, below the phreatic surface where rock and soil is saturated with water, is the counterpart of the vadose zone, or unsaturated zone, above. Unconfined aquifers are also referred to as phreatic aquifers because their upper boundary is provided by the phreatic surf ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
