About 230 results for ‘Bivalvia’
-
Bivalvia
Bivalvia, commonly called the bivalves, is a taxonomic class of marine and freshwater molluscs that have a laterally compressed body enclosed by a shell in two hinged parts. This class includes the clams, oysters, mussels, scallops and numerous other families. The majority are filter feeders and have no head or radula. The gills have been modified into ctenidia, specialised organs for feeding and breathing. The majority of bivalves are infaunal and bury themselves in sediment on the seabed. Others are epifaunal and attach themselves to hard surfaces. A few bore into wood, clay or rock and live inside these substances. Some bivalves, such as the scallops, can swim. The shell of a bivalve is composed of calcium carbonate and consists of two rounded halves called valves, which in most species are more or less mirror images of each other. The valves are joined together at one edge by a flexible ligament which, in conjunction with nearby interlocking "teeth" on the two valves, are known collectively as the hinge. This arrangement allows the shell to be opened and closed without the two halves becoming disarticulated. The shell is typically bilaterally symmetrical, with the hinge lying in the sagittal plane. The adult maximum shell size of extant species ranges from 0.52 millimetres (0.020 in) in Condylonucula maya (a nut clam) to a length of 1,532 millimetres (60.3 in) in Kuphus polythalamia, a kind of shipworm. However, the species generally regarded as the largest living bivalve is the giant clam Tridacna gigas, which can weigh more than 200 kilograms (441 lbs). The largest extinct bivalve known is a species of Platyceramus, whose fossils measure 2 to 3 metres (6 ft 7 in to 9 ft 10 in) in length. Bivalves have been a traditional part of the diet of maritime nations over the years. Oysters were cultured in ponds by the Romans and mariculture has more recently become an important source of bivalves for food. Modern understanding of molluscan reproductive cycles has led to the development of hatcheries and new culture techniques over the last few decades. There is now a better understanding of the hazards of eating raw and undercooked shellfish. Bivalves have also been used in the biocontrol of pollution, in making jewellery, sea silk and buttons and are the source of pearls and mother-of-pearl. The total number of living bivalve species is approximately 9,200. These species are placed within 1,260 genera and 106 families. Marine bivalves represent about 8,000 species, combined in 4 subclasses and 99 families with 1,100 genera. The largest recent marine families are Veneridae with more than 680 species and the Tellinidae and Lucinidae, each with over 500 species. The freshwater bivalves include 7 families, the largest of which is the Unionidae with about 700 species.
-
Netsuké en ivoire représentant un haricot et des coquilla...
-
- Portrayed subject:
- Bivalvia
- Phaseolus vulgaris
-
- Date:
- 18th century
-
JUPITER...JUNON (titre inscrit)
-
- Field(s):
- Ethnology
-
- Portrayed subject:
- Ancient Rome
- Apollo
- Arrow
- Beard
- Bivalvia
- Bow and arrow
- …
-
- Date:
- 19th century
-
-
SANTO / ANTONIO / DE PADUA (titre inscrit)
-
- Field(s):
- Ethnology
-
- Portrayed subject:
- Altar
- Anthony of Padua
- Beatific vision
- Bivalvia
- Child Jesus
- Cloud
- …
-
- Date:
- 18th century
-
-
60 MARSEILLE - MARCHANDS DE COQUILLAGE
-
- Field(s):
- Ethnology
- Photography
-
- Portrayed subject:
- Bivalvia
- Bowler hat
- Cap
- Child
- Crustacean
- Man
- …
-
- Date:
- 20th century
-
-
LA VIERGE FIDELE - VIERGE DE LA GROTTE
-
- Field(s):
- Ethnology
- Photography
-
- Portrayed subject:
- Bivalvia
- Cave
- Douvres-la-Délivrande
- Leaf
- Statue
-
- Date:
- 20th century
-
-
-
Les quatre parties du monde : L'Afrique, projet de décor ...
-
- Field(s):
- Drawing
-
- Portrayed subject:
- Bird
- Bivalvia
- Eurasian Jay
- Guineafowl
- Sky
- Symbol
-
- Date:
- 19th century
-
-
-
- Artist(s):
- Auguste Rodin
DIVERS CROQUIS DONT DEUX LEDA AU CYGNE ET UNE FEMME TENAN...
-
- Field(s):
- Drawing
-
- Portrayed subject:
- Bivalvia
- Leda (mythology)
- Swan
- Woman
-
- Date:
- 19th century
-
-
-
- Artist(s):
- Auguste Rodin
- Michelangelo
FEUILLE DE CROQUIS AU RECTO ; FEUILLE D'ETUDES AU VERSO
-
- Field(s):
- Drawing
-
- Date:
- 19th century
-
-
Les moules sur le récif [titre attribué]
-
- Field(s):
- Drawing
-
- Portrayed subject:
- Bivalvia
- Landscape
- Littoral zone
-
- Date:
- 20th century
-
-
Culture de bigorneaux près de Saint Servan [titre attribué]
-
- Field(s):
- Drawing
-
- Portrayed subject:
- Animal husbandry
- Bivalvia
- Estuary
- Hill
- Landscape
- Littoral zone
-
- Date:
- 20th century
-
-
Le crabe et trois-mâts (projet) [titre attribué]
-
- Field(s):
- Drawing
-
- Portrayed subject:
- Bird
- Bivalvia
- Sailing ship
- Wind wave
-
- Date:
- 20th century
-
-
La frégate La Fée (titre inscrit)
-
- Field(s):
- Drawing
-
- Portrayed subject:
- Bivalvia
- Dolphin
- Music
- Sailing ship
- Sea
-
- Date:
- 20th century
-
-
Décor de faune marine (étude) [titre attribué]
-
- Field(s):
- Drawing
-
- Portrayed subject:
- Bivalvia
-
- Date:
- 20th century
-
-
-
-
-
- Artist(s):
- Antoine Berjon
Bouquet de lis et de roses dans une corbeille posée sur u...
-
- Field(s):
- Painting
-
- Portrayed subject:
- Basket weaving
- Bivalvia
- Flower bouquet
- Lilium
- Rose
- Still life
-
- Date:
- 19th century
-
-
CINQ COQUILLAGES SUR UNE TRANCHE DE PIERRE
-
- Field(s):
- Painting
-
- Portrayed subject:
- Bivalvia
- Still life
-
- Date:
- 17th century
-
-
SIX COQUILLAGES SUR UNE TRANCHE DE PIERRE
-
- Field(s):
- Painting
-
- Portrayed subject:
- Bivalvia
- Still life
-
- Date:
- 17th century
-
