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Paleobiogeographic patterns in Late Mississippian trilobites of the United States with new species from Montana

Annals of Carnegie Museum

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Abstract

Two new species of trilobites, Weberides chamberlaini new species and Weberides samwaysi new species, are described from the Heath Formation (Serpukhovian, Mississippian) of Montana. Based upon phylogenetic analysis, the assignment of these species to the genus Weberides represents the first recognition of this genus in North America. Brooks Parsimony Analysis of the single phylogenetic tree suggests that the northern Cordillera acted as an ancestral area for the typically European genus Weberides. Thus, the North American vicariants of Weberides share a common ancestral area with the genus Paladin. Vicariance patterns suggest that interchange with the type Weberides areas of Europe was through the northern Cordilleran region rather than through the Rheic Ocean, as others have suggested.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Paleobiogeographic patterns in Late Mississippian trilobites of the United States with new species from Montana
Series title:
Annals of Carnegie Museum
Volume
74
Issue:
2
Year Published:
2005
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
First page:
77
Last page:
89
Number of Pages:
13