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Microcondylaea Compressa
''Microcondylaea compressa'' is a species of freshwater mussel in the family Unionidae 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. The range of distribution for this family is world-wide. It is at its most diverse ..., the river mussels. Distribution This species is present in southern Europe (Albania, Croatia, Italy, Macedonia and Slovenia). Habitat This species prefers weakly flowing waters, lakes and stagnant waters with fine sandy substrate with some amount of clay. It does not tolerate large excursions of the environmental parameters. Description ''Microcondylaea compressa'' can reach a length of about and a width of . Shells are quite elongated and laterally compressed. The external surface is light brown to brown with living mussels (empty shells are often coloured dark brown to black) and shows shallow concentric striae of growth. Typical for this s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Valve (mollusc)
A valve is each articulating part of the shell of a mollusc or another multi-shelled animal such as brachiopods and some crustaceans. Each part is known as a valve or in the case of chitons, a "plate". Members of two classes of molluscs, the Bivalvia (clams) and the Polyplacophora (chitons), have valves. Species within one family of very unusual small sea snails, marine opisthobranch gastropods in the family Juliidae, also have two articulating shells or valves, which resemble those of a bivalve. This exceptional family is commonly known as the bivalved gastropods. Gastropods in general are sometimes called "univalves", because in those that have a shell, the shell is usually in one part. Chitons The valves of chitons are eight dorsal, articulated shell plates, which are frequently coloured and sculpted. After death the girdle that holds the plates together disintegrates and the plates separate. Thus individual plates can be found washed up in beach drift, as shown in the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Karl Theodor Menke
Karl Theodor Menke (13 September 1791 – 1861) was a German malacologist and balneologist who was a native of Bremen. He is remembered for his research on snails. Menke studied medicine at the University of Göttingen (with Promotion in 1814), and worked as a physician at the spa in Bad Pyrmont. In 1831 he was elected a member of the Academy of Sciences Leopoldina. In 1844 he founded the journal ''Zeitschrift für Malakozoologie'' (from 1854 titled ''Malakozoologische Blätter''). With Ludwig Karl Georg Pfeiffer (1805—1877), he was editor of the magazine. During his lifetime, Menke amassed a large collection of snail shells, which were purchased by dealer M.J. Landauer of Frankfurt after his death. The sea snail species; '' Cerithium menkei'' and '' Natica menkeana'' are named in honor of Menke. Also in 1843, '' Menkea'' a genus of flowering plants from Australia, belonging to the family Brassicaceae was published and named in his honour. Bibliography * Karl Theodor Menke ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Freshwater Bivalve
Freshwater bivalves are one kind of freshwater mollusc, along with freshwater snails. They are bivalves that live in fresh water as opposed to salt water, which is the main habitat type for bivalves. The majority of species of bivalve molluscs live in the sea, but in addition, a number of different families live in fresh water (and in some cases, also in brackish water). These families belong to two different evolutionary lineages (freshwater mussels and freshwater clams), and the two groups are not closely related. Freshwater bivalves have a simple morphology that varies among taxa, and are distributed around most regions of the world. Species in the two groups vary greatly in size. Some pea clams (''Pisidium'' species) have an adult size of only 3 mm. In contrast, one of the largest species of freshwater bivalves is the swan mussel, in the family Unionidae; it can grow to a length of 20 cm, and usually lives in lakes or slow rivers. Freshwater pearl mussels are econo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mussel
Mussel () is the common name used for members of several families of bivalve molluscs, from saltwater and Freshwater bivalve, freshwater habitats. These groups have in common a shell whose outline is elongated and asymmetrical compared with other edible clams, which are often more or less rounded or oval. The word "mussel" is frequently used to mean the bivalves of the marine family Mytilidae, most of which live on exposed shores in the intertidal zone, attached by means of their strong Byssus, byssal threads ("beard") to a firm substrate. A few species (in the genus ''Bathymodiolus'') have colonised hydrothermal vents associated with deep ocean ridges. In most marine mussels the shell is longer than it is wide, being wedge-shaped or asymmetrical. The external colour of the shell is often dark blue, blackish, or brown, while the interior is silvery and somewhat nacreous. The common name "mussel" is also used for many freshwater bivalves, including the freshwater pearl mussels. F ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Unionidae
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. The range of distribution for this family is world-wide. It is at its most diverse in North America, with about 297 recognised taxa, but China and Southeast Asia also support very diverse faunas. Freshwater mussels occupy a wide range of habitats, but most often occupy lotic waters, i.e. flowing water such as rivers, streams and creeks. Origin and early diversification 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). Life history Unionidae burrow into the substrate, with their posterior margins exposed. They pump water through the incurrent aperture, obtaining oxygen and food. They remove ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Microcondylaea Bonellii A MRKVICKA
''Microcondylaea'' is a genus of freshwater mussels in the family Unionidae, the river mussels. Species * ''Microcondylaea compressa ''Microcondylaea compressa'' is a species of freshwater mussel in the family Unionidae 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 uni ...'' (Menke, 1828) References Unionidae Bivalve genera {{Unionidae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
