Information about Chippewaella
Chippewaella patellitheca is a very primitive snail-like mollusc from the Late Cambrian. According to Wagner 1999 it is the most basal gastropod.
External links
References
- Wagner, P. J. (1999). Phylogenetics of the earliest anisostrophically coiled gastropods. Smithsonian Contributions to Paleobiology 88: 1 - 132.
[no date]. Systematic Paleontology of the Earliest Gastropods (Including Family and Genus Level Stratigraphic Ranges and Synonyms
Mollusca
Linnaeus, 1758
Classes
Caudofoveata
Aplacophora
Polyplacophora
Monoplacophora
Bivalvia
Scaphopoda
Gastropoda
Cephalopoda
† Rostroconchia
† Helcionelloida
† ?Bellerophontida
The molluscs
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Linnaeus, 1758
Classes
Caudofoveata
Aplacophora
Polyplacophora
Monoplacophora
Bivalvia
Scaphopoda
Gastropoda
Cephalopoda
† Rostroconchia
† Helcionelloida
† ?Bellerophontida
The molluscs
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The Furongian (which represented approximately the old notions of Late Cambrian, Merioneth, Croixian, or Potsdamian) is the third and final geological epoch of the Cambrian Period. It spans the time between 501 ± 2 Ma and 488.3 ± 1.
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In phylogenetics, basal members of a group diverged earlier than a subgroup of others (or vice versa). It is often used in opposition to the word derived. The following are example usages of the term basal:....
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Gastropoda
Cuvier, 1797
Subclasses
Eogastropoda (True Limpets and relatives)
Orthogastropoda
The gastropods, also previously known as gasteropods, or univalves
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Cuvier, 1797
Subclasses
Eogastropoda (True Limpets and relatives)
Orthogastropoda
The gastropods, also previously known as gasteropods, or univalves
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Peter J. Wagner (born 27 September 1964) is a paleontologist and curator at the Smithsonian Institution. He received his Ph.D. in Geophysical Sciences from The University of Chicago in 1995, conducted postdoctoral research at the Smithsonian Institution, and served as a curator at
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