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Heterodonta
Heteroconchia is a Taxonomy (biology), taxonomic infraclass of diverse bivalve molluscs, belonging to the subclass Autobranchia. This infraclass includes the cockle (bivalve), cockles, Venus clams, the Unionida, freshwater mussels, Palaeoheterodonta, brooch clams, as well as Heterodonta and Archiheterodonta. Description These bivalves are distinguished by having the two halves of the Bivalve shell, shell equally sized (i.e, they are ''equivalved'') and having a few hinge teeth, cardinal teeth separated from a number of long hinge teeth, lateral teeth. Their shells lack a nacreous layer, and the gills are lamellibranch in form. Most species have a siphon (mollusc), siphon. Orders and families The following tree is their info which has been updated with the latest information from the World Register of Marine Species: Infraclass: Heteroconchia *Unclassified family: †Lipanellidae *Subterclass: Archiheterodonta **Order: †Actinodontida ***Superfamily: †Amnigenioidea ****Fam ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lamellibranch
Bivalvia () or bivalves, in previous centuries referred to as the Lamellibranchiata and Pelecypoda, is a class (biology), class of aquatic animal, aquatic molluscs (marine and freshwater) that have laterally compressed soft bodies enclosed by a calcified exoskeleton consisting of a hinged pair of half-bivalve shell, shells known as valve (mollusc), valves. As a group, bivalves have no head and lack some typical molluscan organs such as the radula and the odontophore. Their gills have evolved into ctenidium (mollusc), ctenidia, specialised organs for feeding and breathing. Common bivalves include clams, oysters, Cockle (bivalve), cockles, mussels, scallops, and numerous other family (biology), families that live in saltwater, as well as a number of families that live in freshwater. Majority of the class are benthic filter feeders that bury themselves in sediment, where they are relatively safe from predation. Others lie on the sea floor or attach themselves to rocks or other h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Palaeoheterodonta
Palaeoheterodonta is a subterclass of bivalve molluscs. It contains the extant orders Unionida (freshwater mussels) and Trigoniida. They are distinguished by having the two halves of the shell be of equal size and shape, but by having the hinge teeth be in a single row, rather than separated into two groups, as they are in the clams and cockles. 2010 Taxonomy of the Palaeoheterodonta In 2010 a new proposed classification system for the Bivalvia was published in by Bieler, Carter & Coan revising the classification of the Bivalvia, including the subclass Paleoheterodonta.Bieler, R., Carter, J.G. & Coan, E.V. (2010) ''Classification of Bivalve families''. Pp. 113-133, in: Bouchet, P. & Rocroi, J.P. (2010), ''Nomenclator of Bivalve Families. Malacologia'' 52(2): 1-184 Superfamilies and families as listed by Bieler ''et al''. Use of † indicate families and superfamilies that are extinct. Subterclass: Palaeoheterodonta Order: Trigoniida Source: *† Beichuanioidea Liu & Gu, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Veneridae
The Veneridae or venerids, common name: Venus (mythology), Venus clams, are a very large family of minute to large, saltwater clams, marine bivalve molluscs. Over 500 living species of venerid bivalves are known, most of which are edible, and many of which are exploited as food sources. Many of the most important edible species are commonly known (in the USA) simply as "clams". Venerids make up a significant proportion of the world fishery of edible bivalves. The family includes some species that are important commercially, such as (in the USA) the hard clam or quahog, ''Mercenaria mercenaria''. Taxonomy The classification within the family Veneridae has been controversial at least since the 1930s. Molecular approaches show that much of this traditional classification is unnatural. Some common species have been moved between genera (including genera in different subfamilies) because of repeated attempts to bring a more valid organization to the classification or Taxonomy (biol ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Actinodontidae (bivalve)
Actinodontidae is an extinct family of temnospondyls that lived during the Permian period. The family is a sister taxon to Archegosauridae, under the superfamily Archegosauroidea Archegosauroidea is an extinct superfamily of Permian temnospondyls. The superfamily is assigned to the clade Stereospondylomorpha and is the sister taxon to the suborder Stereospondyli. It includes the families Actinodontidae and Archegosauri ....Though air-breathing via lungs, they would have been more physiologically similar to fishes than present amphibians or tetrapods; living primarily in brackish or freshwater environments. References Sources * Permian temnospondyls Permian extinctions Temnospondyl families Stereospondylomorpha {{temnospondyli-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
