Two significant fusulinid genera from Word Formation (Permian), Texas

The new genus Skinnerina, type species S. typicalis, n. sp., (Schwagerininae) in the lower part of the Word Formation, Glass Mountains, Texas, has a thickly fusiform test, two or more irregular tunnels in later volutions, and thick secondary deposits on the septal folds. Phylogenetic relations with Parafusulina (its apparent ancestor), and Polydiexodina are charted and discussed. Rausella erratica Dunbar (Ozawainellinae), reported for the first time from the lower Word Ford Formation, Glass Mountains, extends the range of this distinct but rare genus nearly to the base of the Guadalupian in West Texas.

This record provided courtesy of AGI/GeoRef.

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				G. P. Nestell and M. K. Nestell Middle Permian (Late Guadalupian) foraminifers from Dark Canyon, Guadalupe Mountains, New Mexico Micropaleontology, March 1, 2006; 52(1): 1 - 50. [Abstract] [Full Text] [PDF]