rudist bivalves
rudist bivalves An extinct group of coraland horn-shaped bivalves (Bivalvia, subclass Heterodonta). They have a variable morphology and many species are not easily seen to be bivalves. They are adapted to a sedentary mode of life. Some forms have a larger lower left valve and an upper right valve that forms a flat lid; other forms have a larger lower right valve. The lower valve is often very thick and may have a complex wall structure. There is a tendency to develop a cylindrical and coral-like form. Rudist bivalves are found in Cretaceous rocks, sometimes forming extensive mounds.
More From encyclopedia.com
Paleotaxus Rediviva , Palaeotaxus rediviva The earliest recorded species of the Taxales (yew) family. Found in the Lower Jurassic of Europe, it is distinguished by the for… tenrec , Tenrecidae (otter shrew, tenrec; suborder Lipotyphla, superfamily Soricoidea) A family of insectivores in which a cloaca is present, and in which the… Form , FORM
From the Latin forma, a term signifying figure or shape or "that which is seen" (Gr. ε[symbol omitted]δος) and having many derived meanings, suc… Mammutidae , Mammutidae (Mastodontidae; order Proboscidea, suborder Mammutoidea) An extinct, monospecific family (Mammut or Mastodon) of mastodons, comprising ele… cisterna , cisterna (pl. cisternae) Any of the membrane-bound sacs that form the branches of the endoplasmic reticulum (ER) and Golgi apparatus. The cisternae o… Tectosilicates , Tectosilicates
The most abundant rock-forming minerals in the crust of Earth are the silicates. They are formed primarily of silicon and oxygen , tog…
You Might Also Like
NEARBY TERMS
rudist bivalves