Bivalvia , in previous centuries referred to as the Lamellibranchiata and Pelecypoda, is a class of marine and freshwater molluscs that have laterally compressed bodies enclosed by a shell consisting of two hinged parts. As a group, bivalves have no head and they lack some usual molluscan organs, like … See more The taxonomic term Bivalvia was first used by Linnaeus in the 10th edition of his Systema Naturae in 1758 to refer to animals having shells composed of two valves. More recently, the class was known as … See more The Cambrian explosion took place around 540 to 520 million years ago (Mya). In this geologically brief period, all the major animal See more The adult maximum size of living species of bivalve ranges from 0.52 mm (0.02 in) in Condylonucula maya, a nut clam, to a length of 1,532 millimetres (60.3 in) in Kuphus polythalamia, an elongated, burrowing shipworm. However, the species generally … See more Bivalves have bilaterally symmetrical and laterally flattened bodies, with a blade-shaped foot, vestigial head and no radula. At the dorsal or … See more Brachiopods are shelled marine organisms that superficially resembled bivalves in that they are of similar size and have a hinged shell in two parts. However, brachiopods evolved from a very different ancestral line, and the resemblance to bivalves only arose because they … See more The bivalves are a highly successful class of invertebrates found in aquatic habitats throughout the world. Most are infaunal and live buried in … See more Most bivalves adopt a sedentary or even sessile lifestyle, often spending their whole lives in the area in which they first settled as juveniles. The … See more WebThe name bivalve comes from Latin as most biological classifications do. 'Bi' means two and 'valve' is really 'valvae', which means 'leaves of a door'. 'Bi' means two and 'valve' is really 'valvae ...
Bivalves Fossil Focus Time Discovering Geology British ...
Webbi· valve ˈbī-ˌvalv : being or having a shell composed of two valves bivalve 2 of 2 noun : any of a class (Bivalvia synonym Pelecypoda) of typically marine mollusks (such as clams, … Web26 Aug 2024 · Bivalves are a common group of animals. They occur in all aquatic habitats, however by far the majority of species are marine. Bivalves are known by a variety of … toifl bau
Bivalvia - Wiktionary
WebDictionary entry overview: What does bivalve mean? • BIVALVE (noun) The noun BIVALVE has 1 sense:. 1. marine or freshwater mollusks having a soft body with platelike gills enclosed within two shells hinged together Familiarity information: BIVALVE used as a noun is very rare. • BIVALVE (adjective) The adjective BIVALVE has 1 sense:. 1. used of … Webproblematic on etymological grounds because the original Latin root later-, refers to the sides (sideways or flanks) that is, to the ... Thus, lateral, when applied to bivalve morphology has a twofold meaning. I therefore recommend that, at least for poorly known bivalves ... in most bivalves); 2) prososdetic (Gk., anterior the beaks); 3) or Webbivalve, (class Bivalvia), any of more than 15,000 species of clams, oysters, mussels, scallops, and other members of the phylum Mollusca characterized by a shell that is divided from front to back into left and right valves. The valves are connected to one another at a hinge. Primitive bivalves ingest sediment; however, in most species the respiratory gills … peoplesoft commitment accounting