| Medionidus | |
|---|---|
 | |
| Medionidus conradicus | |
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Bivalvia |
| Order: | Unionida |
| Family: | Unionidae |
| Tribe: | Lampsilini |
| Genus: | Medionidus Simpson, 1900 |
Medionidus is a genus of freshwater mussels, aquatic bivalve mollusks in the family Unionidae.
 | This Unionidae-related article is a stub. You can help Wikipedia by expanding it. |
In paleontology, a Lazarus taxon is a taxon that disappears for one or more periods from the fossil record, only to appear again later. Likewise in conservation biology and ecology, it can refer to species or populations that were thought to be extinct, and are rediscovered. The term Lazarus taxon was coined by Karl W. Flessa and David Jablonski in 1983 and was then expanded by Jablonski in 1986. Paul Wignall and Michael Benton defined Lazarus taxa as, "At times of biotic crisis many taxa go extinct, but others only temporarily disappeared from the fossil record, often for intervals measured in millions of years, before reappearing unchanged". Earlier work also supports the concept though without using the name Lazarus taxon, like work by Christopher R. C. Paul.
The Ochlockonee River is a fast running river, except where it has been dammed to form Lake Talquin in Florida, originating in Georgia and flowing for 206 miles (332 km) before terminating in Florida.
Parvulus is a Latin adjective meaning small. It may refer to:
The Chipola slabshell is a part of the phylum Mollusca and the class Bivalvia. This species has suffered a large decrease with upwards of 75% of habitat lost. It is now confined to only a few remnant sites in small drainages within the Chipola River. The federal Endangered Species Act protects it as a designated threatened species by Florida's Endangered and Threatened Species Rule.
Medionidus acutissimus, the Alabama moccasinshell, is a species of freshwater mussel in the family Unionidae, the river mussels. It is native to Alabama, Mississippi, Georgia, Tennessee, and possibly Florida. It is a federally listed threatened species of the United States.
Medionidus conradicus is a species of freshwater mussel, an aquatic bivalve mollusk in the family Unionidae, the river mussels.
The Ochlockonee moccasinshell is a species of freshwater mussel, an aquatic bivalve mollusk in the family Unionidae, the river mussels.
Medionidus walkeri is a species of freshwater mussel, an aquatic bivalve mollusk in the family Unionidae, the river mussels.
On 19 August 2018, the IUCN Red List of Threatened Species identified 4584 endangered species, subspecies, stocks and subpopulations.
Bryant Walker (1856–1936) was an American malacologist who specialized in the non-marine Mollusca. He mainly studied the freshwater mollusks of the USA, in particular those of Michigan. He published many papers on the Unionida, an order of freshwater mussels.
Ambleminae is a subfamily of freshwater mussel in the family Unionidae. They are found throughout much of eastern North America south to Central America, although fossils are also known from Siberia. Some species have also been introduced to East Asia. They are the most speciose radiation of the Unionidae, with more than 300 species.