New Gymnosperms From Triassic Chinle Formation

Contributions to the Upper Triassic Chinle flora in the American southwest

Authors:

Ash

Abstract:

This article summarises an investigation of three selected species of fossil gymnosperms collected from the Upper Triassic Chinle Formation of the American southwest. Included here is an emended diagnosis of Lindleycladus arizonicus (Daugherty) comb. nov., a description of Elatocladus puercoensis sp. nov., and a redescription, based on new material, of the contentious plant fossil Dechellyia gormanii Ash. Also, the evidence (excisions and galls) of insect predation found on some of the leaves of the new specimens of D. gormanii is described and compared with that reported earlier on other fossil leaves in the Chinle Formation.