The origin and diversification of molluscs through geologic time
See also: Evolution of cephalopods
Anatomical diagram of a hypothetical ancestral mollusc
The evolution of the molluscs is the way in which the Mollusca, one of the largest groups of invertebrate animals, evolved. This phylum includes gastropods, bivalves, scaphopods, cephalopods, and several other groups.
The fossil record of mollusks is relatively complete, and they are well represented in most fossil-bearing marine strata. Very early organisms which have dubiously[further explanation needed] been compared to molluscs include Kimberella and Odontogriphus.
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The evolutionof the molluscs is the way in which the Mollusca, one of the largest groups of invertebrate animals, evolved. This phylum includes gastropods...
characteristic ofmolluscs is they are unsegmented and bilaterally symmetrical. The following are present in all modern molluscs: The dorsal part of the body...
Evolution is the change in the heritable characteristics of biological populations over successive generations. It occurs when evolutionary processes...
dispute as to whether these shell-bearing molluscs form a monophyletic group (conchifera) or whether shell-less molluscs are interleaved into their family tree...
of vertebrates, while scallops have up to 100 simple eyes. There are between seven and eleven distinct eye types in molluscs. Molluscs have eyes of all...
diversification of butterflies through geologic time Peppered moth evolution – Significance of the peppered moth in evolutionary biology Evolutionofmolluscs – The...
The evolutionof mammals has passed through many stages since the first appearance of their synapsid ancestors in the Pennsylvanian sub-period of the...
scientists and philosophers of science have described evolution as fact and theory, a phrase which was used as the title of an article by paleontologist...
The evolutionof cetaceans is thought to have begun in the Indian subcontinent from even-toed ungulates (Artiodactyla) 50 million years ago (mya) and to...
includes the molluscs, annelids, brachiopods, nemerteans, bryozoa and entoprocts. The molluscs, the second-largest animal phylum by number of described species...
Many scientists have found the evolutionof the eye attractive to study because the eye distinctively exemplifies an analogous organ found in many animal...
of insulin that is more similar to fish insulin protein sequences than to insulin from more closely related molluscs, suggesting convergent evolution...
timeline of human evolution outlines the major events in the evolutionary lineage of the modern human species, Homo sapiens, throughout the history of life...
that they have diverged through the process ofevolution from a common ancestor. The earliest clear evidence of life comes from biogenic carbon signatures...
mainly fossils. In biology, evolution is any change across successive generations in the heritable characteristics of biological populations. Evolutionary...
Darwinian evolution have been proposed by scholars investigating biology to explain signs ofevolution and the relatedness of different groups of living...
form of the species and, like their mainland counterparts, ranges from small mammals, insects and invertebrates through to crustaceans and molluscs. Family...
the largest shell of any living gastropod Molluscs usually have eyes. Bordering the edge of the mantle of a scallop, a bivalve mollusc, can be over 100...
diverse forms; the evolutionof plants; the evolutionof fish, arthropods and molluscs; the terrestrial colonization and evolutionof insects, chelicerates...
The evolutionof fishes took place over a timeline which spans the Cambrian to the Cenozoic, including during that time in particular the Devonian, which...
cephalopods. However, because chambered shells are found in a range ofmolluscs – monoplacophorans and gastropods as well as cephalopods – a siphuncle...
ancestor. This forms an important part of the evidence on which evolutionary theory rests, demonstrates that evolution does occur, and illustrates the processes...
The evolutionof the wolf occurred over a geologic time scale of at least 300 thousand years. The grey wolf Canis lupus is a highly adaptable species that...
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...
The evolutionof photosynthesis refers to the origin and subsequent evolutionof photosynthesis, the process by which light energy is used to assemble...
or parts of organisms. Further, only the parts of organisms that were already mineralised are usually preserved, such as the shells ofmolluscs. Since most...
understanding ofevolution. Only the parts of organisms that were already mineralised are usually preserved, such as the shells ofmolluscs. It helps that...
reverse is typically true of its sister clade, Deuterostomia. Well known examples of protostomes are arthropods, molluscs, annelids, flatworms and nematodes...
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