Unionidae
Presence of a unique male-specific extension of C-terminus to the cytochrome c oxidase subunit II protein coded by the male-transmitted mitochondrial genome of Venustaconcha ellipsiformis (Bivalvia: Unionoidea). (1/10)
Analyses of unionoidean bivalve male-transmitted (M) mtDNA genomes revealed an approximately 555 bp 3' coding extension to cox2. An antibody was generated against this predicted C-terminus extension to determine if the unique cox2 protein is expressed. Western blot and immunohistochemistry analyses demonstrated that the protein was predominantly expressed in testes. Weak expression was detected in other male tissues but the protein was not detected in female tissues. This is the first report documenting the expression of a cox2 protein with a long C-terminus in animals. Its universal presence in unionoidean bivalve testes suggests a functional significance for the protein. (+info)Encapsulation of attached ectoparasitic glochidia larvae of freshwater mussels by epithelial tissue on fins of naive and resistant host fish. (2/10)
To metamorphose into juveniles and subsequently mature into adults, the glochidia larvae of freshwater mussels in the order Unionoida must temporarily parasitize the gills, fins, or other external structures of fish. Once attached to the fish, the glochidium is encapsulated by host fish epithelial tissue. The migration of epithelial cells of the bluegill sunfish Lepomis macrochirus over glochidia of Utterbackia imbecillis was examined by time-lapse video microscopy, and the morphology was examined by scanning electron microscopy. Initially, the leading edge epithelial cells migrating over the larvae became rounded and the cells moved as a sheet until the attached glochidium was completely covered. Cyst formation on host fish that had been repeatedly exposed to mussel larvae was significantly delayed and morphologically irregular compared to that on naive fish. Cyst formation on other species of fish that are less successful as hosts was examined. In general, it took longer for glochidia to become encapsulated on these less suitable potential hosts. The delay and irregularities in cyst formation on resistant fish and nonhost fish species may result in increased mortality and reduced success of metamorphosis of glochidia. (+info)Reproductive function for a C-terminus extended, male-transmitted cytochrome c oxidase subunit II protein expressed in both spermatozoa and eggs. (3/10)
Our previous study documented expression of a male-transmitted cytochrome c oxidase subunit II protein (MCOX2), with a C-terminus extension (MCOX2e), in unionoidean bivalve testes and sperm mitochondria. Here, we present evidence demonstrating that MCOX2 is seasonally expressed in testis, with a peak shortly before fertilization that is independent of sperm density. MCOX2 is localized to the inner and outer sperm mitochondrial membranes and the MCOX2 antibody's epitope is conserved across >65 million years of evolution. We also demonstrate the presence of male-transmitted mtDNA and season-specific MCOX2 spatial variation in ovaries. We hypothesize that MCOX2 plays a role in reproduction through gamete maturation, fertilization and/or embryogenesis. (+info)Transcriptomic responses to heat stress in invasive and native blue mussels (genus Mytilus): molecular correlates of invasive success. (4/10)
(+info)Novel protein genes in animal mtDNA: a new sex determination system in freshwater mussels (Bivalvia: Unionoida)? (5/10)
(+info)Influence of cortisol on the attachment and metamorphosis of larval Utterbackia imbecillis on bluegill sunfish (Lepomis macrochirus). (6/10)
The larvae of unionid freshwater mussels (i.e., glochidia) undergo a parasitic stage requiring their attachment to the external epithelia of fish hosts, where they metamorphose into free-living juveniles. We describe the physiological effects in bluegill sunfish (Lepomis macrochirus) of infection with glochidia from the paper pondshell (Utterbackia imbecillis). Glochidia accumulation on bluegill increased dramatically at concentrations of 2000 glochidia liter(-1) and above, reaching a maximum attachment density of about 30 glochidia g(-1) fish at 4000 glochidia liter(-1). Plasma cortisol was the most sensitive indicator of biological effect to glochidial exposure, increasing significantly in hosts exposed to 2000 glochidia liter(-1) or greater. Glochidia were 31% more likely to undergo successful juvenile metamorphosis when attached to bluegill with elevated plasma cortisol, largely due to the enhanced survivorship of these larvae during the first 48 h after infection. We tested the hypothesis that glochidial attachment and juvenile metamorphosis were stimulated directly by plasma cortisol in fish hosts. Bluegill were given an intraperitoneal injection of cortisol, then infected with 1000 glochidia liter(-1) at 48 h after hormone supplementation. Cortisol-injected fish had a 42% increase in the number of attached glochidia g(-1) fish and a 28% increase in larval metamorphosis compared to sham-injected and control fish. We provide evidence that cortisol enhances glochidial metamorphosis on hosts by improving the retention of attached glochidia. This study gives insights into the influence of host physiology on glochidial attachment and juvenile mussel transformation. (+info)Depletion of Cryptosporidium parvum oocysts from contaminated sewage by using freshwater benthic pearl clams (Hyriopsis schlegeli). (7/10)
The freshwater benthic pearl clam, Hyriopsis schlegeli, was experimentally exposed to Cryptosporidium parvum oocysts, and it was verified that the oocysts were eliminated predominantly via the fecal route, retaining their ability to infect cultured cells (HCT-8). The total fecal oocyst elimination rate was more than 90% within 5 days after exposure to the oocysts. H. schlegeli was able to survive in the final settling pond of a sewage plant for long periods, as confirmed by its pearl production. In the light of these findings, the clam was placed in the final settling pond in a trial to test its long-term efficacy in depleting oocysts contaminating the pond water. The number of clams placed was set to ensure a theoretical oocyst removal rate of around 50%, and the turbidity and the density of feed microbes in the overflow trough water of the pond were about 35% and 40 to 60% lower, respectively, than in the control water throughout the year. It was found that the clam feces containing oocysts were sufficiently heavy for them to settle to the bottom of the pond, despite the upward water flow. From these results, we concluded that efficient depletion of oocysts in the sewage water of small or midscale sewage treatment plants can be achieved by appropriate placement of H. schlegeli clams. (+info)Variations on the larval incubation of Anodontites trapesialis (Unionoida, Mycetopodidae): Synergetic effect of the environmental factors and host availability. (8/10)
(+info)Unionidae is not a medical term, but a taxonomic category in the field of biology. It refers to a family of freshwater mussels that are primarily found in North America and Eurasia. These mussels have a unique reproductive strategy where they use fish as hosts for their larvae (glochidia) to develop and grow before settling in the riverbed as juveniles.
While Unionidae may not have a direct connection to medical terminology, it is worth noting that freshwater mussels, including those in Unionidae, play an essential role in maintaining water quality and providing habitat for many aquatic organisms. They can also serve as bioindicators of the health of aquatic ecosystems, which can have implications for public health. For instance, poor water quality can lead to the proliferation of harmful algal blooms or the spread of waterborne diseases, posing risks to human health.
Bivalvia is a class of mollusks, also known as "pelecypods," that have a laterally compressed body and two shells or valves. These valves are hinged together on one side and can be opened and closed to allow the animal to feed or withdraw into its shell for protection.
Bivalves include clams, oysters, mussels, scallops, and numerous other species. They are characterized by their simple body structure, which consists of a muscular foot used for burrowing or anchoring, a soft mantle that secretes the shell, and gills that serve both as respiratory organs and feeding structures.
Bivalves play an important role in aquatic ecosystems as filter feeders, helping to maintain water quality by removing particles and organic matter from the water column. They are also commercially important as a source of food for humans and other animals, and their shells have been used historically for various purposes such as tools, jewelry, and building materials.
Unionidae
Microcondylaea compressa
Charles Torrey Simpson
Sagittunio subrostratus
Amblema neislerii
Baini Prashad
Sculptured pigtoe
Fusconaia cuneolus
Shiny pigtoe
Rotundaria houstonensis
Rotundaria refulgens
Quadrula
Hyriopsis
Bryant Walker
Reginaia
Unio mancus
Obovaria retusa
Round ebonyshell
Megalonaias
Rotundaria couchiana
Rotundaria tuberculata
Rotundaria aurea
Cyclonaias pustulosa
Alabama orb
Rotundaria succissa
Pseudodon
Pleuronaia
Pilsbryoconcha
Mississippi
Jules René Bourguignat
Unionidae - Wikipedia
Data | Free Full-Text | Novel Molecular Resources to Facilitate Future Genetics Research on Freshwater Mussels (Bivalvia:...
Freshwater mussel shells (Unionidae) chronicle changes in a North American river over the past 1000years
"Freshwater bivalves (Unionidae), disequilibrium isotopic fractionation" by D. E. Fastovsky, M. A. Arthur et al.
Genus Unionoida Unionidae Elliptio
Reproductive ecology of Lampsilis bracteata (Bivalvia: Unionidae)
Indonaia rectangularis (Tapparone-Canefri, 1889), comb. nov., a forgotten freshwater mussel species from Myanmar (Bivalvia,...
Bivalve mollusk fauna and ecological groups of Unionidae and Corbiculidae families in natural and artificial reservoirs of...
ПОШИРЕННЯ ТА ЕКОЛОГІЯМОЛЮСКІВ РОДУ UNIO (МОLLUSCA: ВІVALVIA: UNIONIDAE) НА ТЕРИТОРІЇ УКРАЇНИ - Zhytomyr State University...
James River Spinymussel | Encyclopedia.com
Appalachian Monkeyface | Encyclopedia.com
Phylogeny of the most species-rich freshwater bivalve family (Bivalvia: Unionida: Unionidae): Defining modern subfamilies and...
Browse subject: Anatidae -- United States -- Identification | The Online Books Page
Long-term monitoring of growth in the Eastern Elliptio, Elliptio complanata (Bivalvia: Unionidae), in Rhode Island: a...
Localització d'una població viable d'Unio aleroni (Unionidae, Bivalvia) a la conca del Fluvià i estat del coneixement de les...
2016, Thesis, Signature of Postglacial Colonization on Contemporary Genetic Structure and Diversity of Quadrula quadrula ...
Site-specific attachment of Anodonta anatina (Bivalvia: Unionidae) glochidia on two new fish hosts translocated in Lake...
2016, Thesis, Signature of Postglacial Colonization on Contemporary Genetic Structure and Diversity of Quadrula quadrula ...
SciELO - Brazil - Freshwater mussels from South America: state of the art of Unionida, specially Rhipidodontini Freshwater...
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Volume 114 Issue 4 | Transactions of the Kansas Academy of Science
Publications and Research Notes
Freshwater samples in MZNA-INV-FRW: Macroinvertebrate samples from the water quality monitoring network along the Ebro Basin
Check lists of the shells of North America : Smithsonian Institution : Free Download, Borrow, and Streaming : Internet Archive
The EPA National Library Catalog | EPA National Library Network | US EPA
Paksukojaline jõekarp - Vikipeedia
ITIS - Report: Cyclonaias
ITIS - Report: Coelatura choziensis
Bivalvia5
- David H. Kesler , Teresa J. Newton , and Linda Green "Long-term monitoring of growth in the Eastern Elliptio, Elliptio complanata (Bivalvia: Unionidae), in Rhode Island: a transplant experiment," Journal of the North American Benthological Society 26(1), 123-133, (1 March 2007). (bioone.org)
- 2016, Thesis, Signature of Postglacial Colonization on Contemporary Genetic Structure and Diversity of Quadrula quadrula (Bivalvia: Unionidae). (cmich.edu)
- Indicators of physiological condition in juveniles of Utterbackia imbecillis (Bivalvia: Unionidae): a comparison of rearing techniques. (unco.edu)
- Morphological and biochemical changes during metamorphosis in Utterbackia imbecillis (Bivalvia: Unionidae).Journal of Molluscan Studies 68: 159-164. (unco.edu)
- Ultrastructure of the mushroom body: digestion during metamorphosis of Utterbackia imbecillis (Bivalvia: Unionidae). (unco.edu)
Mussels5
- The Unionidae are a family of freshwater mussels, the largest in the order Unionida, the bivalve molluscs sometimes known as river mussels, or simply as unionids. (wikipedia.org)
- Some of the species in the Unionidae, commonly known as pocketbook mussels, have evolved a remarkable reproductive strategy. (wikipedia.org)
- A Survey of the Mussels (Unionidae) of the Upper Tennessee River, 1978. (encyclopedia.com)
- All five mussels belong to the Unionidae family. (animallaw.info)
- Freshwater mussels of the family Unionidae, sometimes called clams, pass through a parasitic larval state, living on the fins, gills, and bodies of fishes. (infoplease.com)
Freshwater mussel1
- The use of environmental DNA (eDNA) to assess aquatic biodiversity is a growing field with great potential for monitoring and managing threatened species, like freshwater mussel (Unionidae) populations. (bvsalud.org)
Mollusca1
- The distribution of Unioniods (Mollusca: Unionidae) in Kentucky. (ky.gov)
Family2
- This study presents the most comprehensive phylogeny to date of the larger Unionida family, i.e., the Unionidae. (iste.edu.tr)
- There are saltwater and freshwater (family Unionidae) varieties, and they come in a variety of sizes. (fact-index.com)
Freshwater1
- The data records represent species from the families of Unionidae and Margaritiferidae and have been added to the Smithsonian's preliminary inventory of U.S. freshwater mussel collections. (lsus.edu)
Unionoida1
- Unionoidea er en overfamilie av større ferskvannsmuslinger (Unionoida) som inkluderer fire familier , hvorav to er utdødd . (wikipedia.org)
Taxonomy1
- This study outlines the taxonomy of the Unionidae from these communities, and all taxa are described and illustrated in detail. (casp.org.uk)
Sphaeriidae1
- Including subspecies and forms, 121 taxa are discussed: 47 Gastropoda, 39 Unionidae, and 35 Sphaeriidae. (epa.gov)
Bivalves1
- In this case there are two types of mtDNA, i.e. the female-transmitted (F-type) and the male-transmitted (M-type), the latter being present only in the male gonads of Unionidae bivalves. (ingentaconnect.com)
Substrate1
- Unionidae burrow into the substrate, with their posterior margins exposed. (wikipedia.org)
Lifecycle1
- Unionidae are distinguished by a unique and complex lifecycle. (wikipedia.org)
Study1
- The recent phylogenetic study reveals that the Unionidae most likely originated in Southeast and East Asia in the Jurassic, with the earliest expansions into North America and Africa (since the mid-Cretaceous) followed by the colonization of Europe and India (since the Paleocene). (wikipedia.org)